Open-sourcing Representation Manager

Representation Manager (RMS) serves as a centralized embedding management system, providing SimClusters or other embeddings as facade of the underlying storage or services.
2024-12-22 18:21:51 +01:00 · 2023-04-18 13:04:42 -07:00 · 2023-04-18 13:04:42 -07:00 · 43cdcf2ed6
commit 43cdcf2ed6
parent 197bf2c563
42 changed files with 3439 additions and 0 deletions
--- a/representation-manager/BUILD.bazel
+++ b/representation-manager/BUILD.bazel
@ -0,0 +1 @@
+# This prevents SQ query from grabbing //:all since it traverses up once to find a BUILD
--- a/representation-manager/README.md
+++ b/representation-manager/README.md
@ -0,0 +1,4 @@
+# Representation Manager #
+
+**Representation Manager** (RMS) serves as a centralized embedding management system, providing SimClusters or other embeddings as facade of the underlying storage or services. 
+
--- a/representation-manager/bin/deploy.sh
+++ b/representation-manager/bin/deploy.sh
@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+JOB=representation-manager bazel run --ui_event_filters=-info,-stdout,-stderr --noshow_progress \
+	//relevance-platform/src/main/python/deploy -- "$@"
--- a/representation-manager/client/src/main/scala/com/twitter/representation_manager/BUILD
+++ b/representation-manager/client/src/main/scala/com/twitter/representation_manager/BUILD
@ -0,0 +1,17 @@
+scala_library(
+    compiler_option_sets = ["fatal_warnings"],
+    platform = "java8",
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "finatra/inject/inject-thrift-client",
+        "frigate/frigate-common/src/main/scala/com/twitter/frigate/common/store/strato",
+        "hermit/hermit-core/src/main/scala/com/twitter/hermit/store/common",
+        "relevance-platform/src/main/scala/com/twitter/relevance_platform/common/readablestore",
+        "representation-manager/client/src/main/scala/com/twitter/representation_manager/config",
+        "representation-manager/server/src/main/thrift:thrift-scala",
+        "src/scala/com/twitter/simclusters_v2/common",
+        "src/thrift/com/twitter/simclusters_v2:simclusters_v2-thrift-scala",
+        "stitch/stitch-storehaus",
+        "strato/src/main/scala/com/twitter/strato/client",
+    ],
+)
--- a/representation-manager/client/src/main/scala/com/twitter/representation_manager/StoreBuilder.scala
+++ b/representation-manager/client/src/main/scala/com/twitter/representation_manager/StoreBuilder.scala
@ -0,0 +1,208 @@
+package com.twitter.representation_manager
+
+import com.twitter.finagle.memcached.{Client => MemcachedClient}
+import com.twitter.finagle.stats.StatsReceiver
+import com.twitter.frigate.common.store.strato.StratoFetchableStore
+import com.twitter.hermit.store.common.ObservedCachedReadableStore
+import com.twitter.hermit.store.common.ObservedReadableStore
+import com.twitter.representation_manager.config.ClientConfig
+import com.twitter.representation_manager.config.DisabledInMemoryCacheParams
+import com.twitter.representation_manager.config.EnabledInMemoryCacheParams
+import com.twitter.representation_manager.thriftscala.SimClustersEmbeddingView
+import com.twitter.simclusters_v2.common.SimClustersEmbedding
+import com.twitter.simclusters_v2.thriftscala.InternalId
+import com.twitter.simclusters_v2.thriftscala.LocaleEntityId
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbeddingId
+import com.twitter.simclusters_v2.thriftscala.TopicId
+import com.twitter.simclusters_v2.thriftscala.{SimClustersEmbedding => ThriftSimClustersEmbedding}
+import com.twitter.storehaus.ReadableStore
+import com.twitter.strato.client.{Client => StratoClient}
+import com.twitter.strato.thrift.ScroogeConvImplicits._
+
+/**
+ * This is the class that offers features to build readable stores for a given
+ * SimClustersEmbeddingView (i.e. embeddingType and modelVersion). It applies ClientConfig
+ * for a particular service and build ReadableStores which implement that config.
+ */
+class StoreBuilder(
+  clientConfig: ClientConfig,
+  stratoClient: StratoClient,
+  memCachedClient: MemcachedClient,
+  globalStats: StatsReceiver,
+) {
+  private val stats =
+    globalStats.scope("representation_manager_client").scope(this.getClass.getSimpleName)
+
+  // Column consts
+  private val ColPathPrefix = "recommendations/representation_manager/"
+  private val SimclustersTweetColPath = ColPathPrefix + "simClustersEmbedding.Tweet"
+  private val SimclustersUserColPath = ColPathPrefix + "simClustersEmbedding.User"
+  private val SimclustersTopicIdColPath = ColPathPrefix + "simClustersEmbedding.TopicId"
+  private val SimclustersLocaleEntityIdColPath =
+    ColPathPrefix + "simClustersEmbedding.LocaleEntityId"
+
+  def buildSimclustersTweetEmbeddingStore(
+    embeddingColumnView: SimClustersEmbeddingView
+  ): ReadableStore[Long, SimClustersEmbedding] = {
+    val rawStore = StratoFetchableStore
+      .withView[Long, SimClustersEmbeddingView, ThriftSimClustersEmbedding](
+        stratoClient,
+        SimclustersTweetColPath,
+        embeddingColumnView)
+      .mapValues(SimClustersEmbedding(_))
+
+    addCacheLayer(rawStore, embeddingColumnView)
+  }
+
+  def buildSimclustersUserEmbeddingStore(
+    embeddingColumnView: SimClustersEmbeddingView
+  ): ReadableStore[Long, SimClustersEmbedding] = {
+    val rawStore = StratoFetchableStore
+      .withView[Long, SimClustersEmbeddingView, ThriftSimClustersEmbedding](
+        stratoClient,
+        SimclustersUserColPath,
+        embeddingColumnView)
+      .mapValues(SimClustersEmbedding(_))
+
+    addCacheLayer(rawStore, embeddingColumnView)
+  }
+
+  def buildSimclustersTopicIdEmbeddingStore(
+    embeddingColumnView: SimClustersEmbeddingView
+  ): ReadableStore[TopicId, SimClustersEmbedding] = {
+    val rawStore = StratoFetchableStore
+      .withView[TopicId, SimClustersEmbeddingView, ThriftSimClustersEmbedding](
+        stratoClient,
+        SimclustersTopicIdColPath,
+        embeddingColumnView)
+      .mapValues(SimClustersEmbedding(_))
+
+    addCacheLayer(rawStore, embeddingColumnView)
+  }
+
+  def buildSimclustersLocaleEntityIdEmbeddingStore(
+    embeddingColumnView: SimClustersEmbeddingView
+  ): ReadableStore[LocaleEntityId, SimClustersEmbedding] = {
+    val rawStore = StratoFetchableStore
+      .withView[LocaleEntityId, SimClustersEmbeddingView, ThriftSimClustersEmbedding](
+        stratoClient,
+        SimclustersLocaleEntityIdColPath,
+        embeddingColumnView)
+      .mapValues(SimClustersEmbedding(_))
+
+    addCacheLayer(rawStore, embeddingColumnView)
+  }
+
+  def buildSimclustersTweetEmbeddingStoreWithEmbeddingIdAsKey(
+    embeddingColumnView: SimClustersEmbeddingView
+  ): ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+    val rawStore = StratoFetchableStore
+      .withView[Long, SimClustersEmbeddingView, ThriftSimClustersEmbedding](
+        stratoClient,
+        SimclustersTweetColPath,
+        embeddingColumnView)
+      .mapValues(SimClustersEmbedding(_))
+    val embeddingIdAsKeyStore = rawStore.composeKeyMapping[SimClustersEmbeddingId] {
+      case SimClustersEmbeddingId(_, _, InternalId.TweetId(tweetId)) =>
+        tweetId
+    }
+
+    addCacheLayer(embeddingIdAsKeyStore, embeddingColumnView)
+  }
+
+  def buildSimclustersUserEmbeddingStoreWithEmbeddingIdAsKey(
+    embeddingColumnView: SimClustersEmbeddingView
+  ): ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+    val rawStore = StratoFetchableStore
+      .withView[Long, SimClustersEmbeddingView, ThriftSimClustersEmbedding](
+        stratoClient,
+        SimclustersUserColPath,
+        embeddingColumnView)
+      .mapValues(SimClustersEmbedding(_))
+    val embeddingIdAsKeyStore = rawStore.composeKeyMapping[SimClustersEmbeddingId] {
+      case SimClustersEmbeddingId(_, _, InternalId.UserId(userId)) =>
+        userId
+    }
+
+    addCacheLayer(embeddingIdAsKeyStore, embeddingColumnView)
+  }
+
+  def buildSimclustersTopicEmbeddingStoreWithEmbeddingIdAsKey(
+    embeddingColumnView: SimClustersEmbeddingView
+  ): ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+    val rawStore = StratoFetchableStore
+      .withView[TopicId, SimClustersEmbeddingView, ThriftSimClustersEmbedding](
+        stratoClient,
+        SimclustersTopicIdColPath,
+        embeddingColumnView)
+      .mapValues(SimClustersEmbedding(_))
+    val embeddingIdAsKeyStore = rawStore.composeKeyMapping[SimClustersEmbeddingId] {
+      case SimClustersEmbeddingId(_, _, InternalId.TopicId(topicId)) =>
+        topicId
+    }
+
+    addCacheLayer(embeddingIdAsKeyStore, embeddingColumnView)
+  }
+
+  def buildSimclustersTopicIdEmbeddingStoreWithEmbeddingIdAsKey(
+    embeddingColumnView: SimClustersEmbeddingView
+  ): ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+    val rawStore = StratoFetchableStore
+      .withView[TopicId, SimClustersEmbeddingView, ThriftSimClustersEmbedding](
+        stratoClient,
+        SimclustersTopicIdColPath,
+        embeddingColumnView)
+      .mapValues(SimClustersEmbedding(_))
+    val embeddingIdAsKeyStore = rawStore.composeKeyMapping[SimClustersEmbeddingId] {
+      case SimClustersEmbeddingId(_, _, InternalId.TopicId(topicId)) =>
+        topicId
+    }
+
+    addCacheLayer(embeddingIdAsKeyStore, embeddingColumnView)
+  }
+
+  def buildSimclustersLocaleEntityIdEmbeddingStoreWithEmbeddingIdAsKey(
+    embeddingColumnView: SimClustersEmbeddingView
+  ): ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+    val rawStore = StratoFetchableStore
+      .withView[LocaleEntityId, SimClustersEmbeddingView, ThriftSimClustersEmbedding](
+        stratoClient,
+        SimclustersLocaleEntityIdColPath,
+        embeddingColumnView)
+      .mapValues(SimClustersEmbedding(_))
+    val embeddingIdAsKeyStore = rawStore.composeKeyMapping[SimClustersEmbeddingId] {
+      case SimClustersEmbeddingId(_, _, InternalId.LocaleEntityId(localeEntityId)) =>
+        localeEntityId
+    }
+
+    addCacheLayer(embeddingIdAsKeyStore, embeddingColumnView)
+  }
+
+  private def addCacheLayer[K](
+    rawStore: ReadableStore[K, SimClustersEmbedding],
+    embeddingColumnView: SimClustersEmbeddingView,
+  ): ReadableStore[K, SimClustersEmbedding] = {
+    // Add in-memory caching based on ClientConfig
+    val inMemCacheParams = clientConfig.inMemoryCacheConfig
+      .getCacheSetup(embeddingColumnView.embeddingType, embeddingColumnView.modelVersion)
+
+    val statsPerStore = stats
+      .scope(embeddingColumnView.embeddingType.name).scope(embeddingColumnView.modelVersion.name)
+
+    inMemCacheParams match {
+      case DisabledInMemoryCacheParams =>
+        ObservedReadableStore(
+          store = rawStore
+        )(statsPerStore)
+      case EnabledInMemoryCacheParams(ttl, maxKeys, cacheName) =>
+        ObservedCachedReadableStore.from[K, SimClustersEmbedding](
+          rawStore,
+          ttl = ttl,
+          maxKeys = maxKeys,
+          cacheName = cacheName,
+          windowSize = 10000L
+        )(statsPerStore)
+    }
+  }
+
+}
--- a/representation-manager/client/src/main/scala/com/twitter/representation_manager/config/BUILD
+++ b/representation-manager/client/src/main/scala/com/twitter/representation_manager/config/BUILD
@ -0,0 +1,12 @@
+scala_library(
+    compiler_option_sets = ["fatal_warnings"],
+    platform = "java8",
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "finatra/inject/inject-thrift-client",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/common",
+        "representation-manager/server/src/main/thrift:thrift-scala",
+        "src/thrift/com/twitter/simclusters_v2:simclusters_v2-thrift-scala",
+        "strato/src/main/scala/com/twitter/strato/client",
+    ],
+)
--- a/representation-manager/client/src/main/scala/com/twitter/representation_manager/config/ClientConfig.scala
+++ b/representation-manager/client/src/main/scala/com/twitter/representation_manager/config/ClientConfig.scala
@ -0,0 +1,25 @@
+package com.twitter.representation_manager.config
+
+import com.twitter.simclusters_v2.thriftscala.EmbeddingType
+import com.twitter.simclusters_v2.thriftscala.ModelVersion
+
+/*
+ * This is RMS client config class.
+ * We only support setting up in memory cache params for now, but we expect to enable other
+ * customisations in the near future e.g. request timeout
+ *
+ * --------------------------------------------
+ * PLEASE NOTE:
+ * Having in-memory cache is not necessarily a free performance win, anyone considering it should
+ * investigate rather than blindly enabling it
+ * */
+class ClientConfig(inMemCacheParamsOverrides: Map[
+  (EmbeddingType, ModelVersion),
+  InMemoryCacheParams
+] = Map.empty) {
+  // In memory cache config per embedding
+  val inMemCacheParams = DefaultInMemoryCacheConfig.cacheParamsMap ++ inMemCacheParamsOverrides
+  val inMemoryCacheConfig = new InMemoryCacheConfig(inMemCacheParams)
+}
+
+object DefaultClientConfig extends ClientConfig
--- a/representation-manager/client/src/main/scala/com/twitter/representation_manager/config/InMemoryCacheConfig.scala
+++ b/representation-manager/client/src/main/scala/com/twitter/representation_manager/config/InMemoryCacheConfig.scala
@ -0,0 +1,53 @@
+package com.twitter.representation_manager.config
+
+import com.twitter.simclusters_v2.thriftscala.EmbeddingType
+import com.twitter.simclusters_v2.thriftscala.ModelVersion
+import com.twitter.util.Duration
+
+/*
+ * --------------------------------------------
+ * PLEASE NOTE:
+ * Having in-memory cache is not necessarily a free performance win, anyone considering it should
+ * investigate rather than blindly enabling it
+ * --------------------------------------------
+ * */
+
+sealed trait InMemoryCacheParams
+
+/*
+ * This holds params that is required to set up a in-mem cache for a single embedding store
+ */
+case class EnabledInMemoryCacheParams(
+  ttl: Duration,
+  maxKeys: Int,
+  cacheName: String)
+  extends InMemoryCacheParams
+object DisabledInMemoryCacheParams extends InMemoryCacheParams
+
+/*
+ * This is the class for the in-memory cache config. Client could pass in their own cacheParamsMap to
+ * create a new InMemoryCacheConfig instead of using the DefaultInMemoryCacheConfig object below
+ * */
+class InMemoryCacheConfig(
+  cacheParamsMap: Map[
+    (EmbeddingType, ModelVersion),
+    InMemoryCacheParams
+  ] = Map.empty) {
+
+  def getCacheSetup(
+    embeddingType: EmbeddingType,
+    modelVersion: ModelVersion
+  ): InMemoryCacheParams = {
+    // When requested embedding type doesn't exist, we return DisabledInMemoryCacheParams
+    cacheParamsMap.getOrElse((embeddingType, modelVersion), DisabledInMemoryCacheParams)
+  }
+}
+
+/*
+ * Default config for the in-memory cache
+ * Clients can directly import and use this one if they don't want to set up a customised config
+ * */
+object DefaultInMemoryCacheConfig extends InMemoryCacheConfig {
+  // set default to no in-memory caching
+  val cacheParamsMap = Map.empty
+}
--- a/representation-manager/server/BUILD
+++ b/representation-manager/server/BUILD
@ -0,0 +1,21 @@
+jvm_binary(
+    name = "bin",
+    basename = "representation-manager",
+    main = "com.twitter.representation_manager.RepresentationManagerFedServerMain",
+    platform = "java8",
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "finatra/inject/inject-logback/src/main/scala",
+        "loglens/loglens-logback/src/main/scala/com/twitter/loglens/logback",
+        "representation-manager/server/src/main/resources",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager",
+        "twitter-server/logback-classic/src/main/scala",
+    ],
+)
+
+#  Aurora Workflows build phase convention requires a jvm_app named with ${project-name}-app
+jvm_app(
+    name = "representation-manager-app",
+    archive = "zip",
+    binary = ":bin",
+)
--- a/representation-manager/server/src/main/resources/BUILD
+++ b/representation-manager/server/src/main/resources/BUILD
@ -0,0 +1,7 @@
+resources(
+    sources = [
+        "*.xml",
+        "config/*.yml",
+    ],
+    tags = ["bazel-compatible"],
+)
--- a/representation-manager/server/src/main/resources/config/decider.yml
+++ b/representation-manager/server/src/main/resources/config/decider.yml
@ -0,0 +1,219 @@
+# ---------- traffic percentage by embedding type and model version ----------
+# Decider strings are build dynamically following the rule in there
+# i.e. s"enable_${embeddingType.name}_${modelVersion.name}"
+# Hence this should be updated accordingly if usage is changed in the embedding stores
+
+# Tweet embeddings
+"enable_LogFavBasedTweet_Model20m145k2020":
+  comment: "Enable x% read traffic (0<=x<=10000, e.g. 1000=10%) for LogFavBasedTweet - Model20m145k2020. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_LogFavBasedTweet_Model20m145kUpdated":
+  comment: "Enable x% read traffic (0<=x<=10000, e.g. 1000=10%) for LogFavBasedTweet - Model20m145kUpdated. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_LogFavLongestL2EmbeddingTweet_Model20m145k2020":
+  comment: "Enable x% read traffic (0<=x<=10000, e.g. 1000=10%) for LogFavLongestL2EmbeddingTweet - Model20m145k2020. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_LogFavLongestL2EmbeddingTweet_Model20m145kUpdated":
+  comment: "Enable x% read traffic (0<=x<=10000, e.g. 1000=10%) for LogFavLongestL2EmbeddingTweet - Model20m145kUpdated. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+# Topic embeddings
+"enable_FavTfgTopic_Model20m145k2020":
+  comment: "Enable the read traffic to FavTfgTopic - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_LogFavBasedKgoApeTopic_Model20m145k2020":
+  comment: "Enable the read traffic to LogFavBasedKgoApeTopic - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+# User embeddings - KnownFor
+"enable_FavBasedProducer_Model20m145kUpdated":
+  comment: "Enable the read traffic to FavBasedProducer - Model20m145kUpdated from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_FavBasedProducer_Model20m145k2020":
+  comment: "Enable the read traffic to FavBasedProducer - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_FollowBasedProducer_Model20m145k2020":
+  comment: "Enable the read traffic to FollowBasedProducer - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_AggregatableFavBasedProducer_Model20m145kUpdated":
+  comment: "Enable the read traffic to AggregatableFavBasedProducer - Model20m145kUpdated from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_AggregatableFavBasedProducer_Model20m145k2020":
+  comment: "Enable the read traffic to AggregatableFavBasedProducer - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_AggregatableLogFavBasedProducer_Model20m145kUpdated":
+  comment: "Enable the read traffic to AggregatableLogFavBasedProducer - Model20m145kUpdated from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_AggregatableLogFavBasedProducer_Model20m145k2020":
+  comment: "Enable the read traffic to AggregatableLogFavBasedProducer - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+enable_RelaxedAggregatableLogFavBasedProducer_Model20m145kUpdated:
+  comment: "Enable the read traffic to RelaxedAggregatableLogFavBasedProducer - Model20m145kUpdated from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+enable_RelaxedAggregatableLogFavBasedProducer_Model20m145k2020:
+  comment: "Enable the read traffic to RelaxedAggregatableLogFavBasedProducer - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+# User embeddings - InterestedIn
+"enable_LogFavBasedUserInterestedInFromAPE_Model20m145k2020":
+  comment: "Enable the read traffic to LogFavBasedUserInterestedInFromAPE - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_FollowBasedUserInterestedInFromAPE_Model20m145k2020":
+  comment: "Enable the read traffic to FollowBasedUserInterestedInFromAPE - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_FavBasedUserInterestedIn_Model20m145kUpdated":
+  comment: "Enable the read traffic to FavBasedUserInterestedIn - Model20m145kUpdated from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_FavBasedUserInterestedIn_Model20m145k2020":
+  comment: "Enable the read traffic to FavBasedUserInterestedIn - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_FollowBasedUserInterestedIn_Model20m145k2020":
+  comment: "Enable the read traffic to FollowBasedUserInterestedIn - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_LogFavBasedUserInterestedIn_Model20m145k2020":
+  comment: "Enable the read traffic to LogFavBasedUserInterestedIn - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_FavBasedUserInterestedInFromPE_Model20m145kUpdated":
+  comment: "Enable the read traffic to FavBasedUserInterestedInFromPE - Model20m145kUpdated from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_FilteredUserInterestedIn_Model20m145kUpdated":
+  comment: "Enable the read traffic to FilteredUserInterestedIn - Model20m145kUpdated from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_FilteredUserInterestedIn_Model20m145k2020":
+  comment: "Enable the read traffic to FilteredUserInterestedIn - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_FilteredUserInterestedInFromPE_Model20m145kUpdated":
+  comment: "Enable the read traffic to FilteredUserInterestedInFromPE - Model20m145kUpdated from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_UnfilteredUserInterestedIn_Model20m145kUpdated":
+  comment: "Enable the read traffic to UnfilteredUserInterestedIn - Model20m145kUpdated from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_UnfilteredUserInterestedIn_Model20m145k2020":
+  comment: "Enable the read traffic to UnfilteredUserInterestedIn - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_UserNextInterestedIn_Model20m145k2020":
+  comment: "Enable the read traffic to UserNextInterestedIn - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_LogFavBasedUserInterestedMaxpoolingAddressBookFromIIAPE_Model20m145k2020":
+  comment: "Enable the read traffic to LogFavBasedUserInterestedMaxpoolingAddressBookFromIIAPE - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_LogFavBasedUserInterestedAverageAddressBookFromIIAPE_Model20m145k2020":
+  comment: "Enable the read traffic to LogFavBasedUserInterestedAverageAddressBookFromIIAPE - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_LogFavBasedUserInterestedBooktypeMaxpoolingAddressBookFromIIAPE_Model20m145k2020":
+  comment: "Enable the read traffic to LogFavBasedUserInterestedMaxpoolingAddressBookFromIIAPE - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_LogFavBasedUserInterestedLargestDimMaxpoolingAddressBookFromIIAPE_Model20m145k2020":
+  comment: "Enable the read traffic to LogFavBasedUserInterestedAverageAddressBookFromIIAPE - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_LogFavBasedUserInterestedLouvainMaxpoolingAddressBookFromIIAPE_Model20m145k2020":
+  comment: "Enable the read traffic to LogFavBasedUserInterestedMaxpoolingAddressBookFromIIAPE - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+"enable_LogFavBasedUserInterestedConnectedMaxpoolingAddressBookFromIIAPE_Model20m145k2020":
+  comment: "Enable the read traffic to LogFavBasedUserInterestedAverageAddressBookFromIIAPE - Model20m145k2020 from 0% to 100%. 0 means return EMPTY for all requests."
+  default_availability: 10000
+
+# ---------- load shedding by caller id ----------
+# To create a new decider, add here with the same format and caller's details :
+# "representation-manager_load_shed_by_caller_id_twtr:{{role}}:{{name}}:{{environment}}:{{cluster}}"
+# All the deciders below are generated by this script:
+# ./strato/bin/fed deciders representation-manager --service-role=representation-manager --service-name=representation-manager
+# If you need to run the script and paste the output, add ONLY the prod deciders here.
+"representation-manager_load_shed_by_caller_id_all":
+  comment: "Reject all traffic from caller id: all"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:cr-mixer:cr-mixer:prod:atla":
+  comment: "Reject all traffic from caller id: twtr:svc:cr-mixer:cr-mixer:prod:atla"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:cr-mixer:cr-mixer:prod:pdxa":
+  comment: "Reject all traffic from caller id: twtr:svc:cr-mixer:cr-mixer:prod:pdxa"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:simclusters-ann:simclusters-ann-1:prod:atla":
+  comment: "Reject all traffic from caller id: twtr:svc:simclusters-ann:simclusters-ann-1:prod:atla"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:simclusters-ann:simclusters-ann-1:prod:pdxa":
+  comment: "Reject all traffic from caller id: twtr:svc:simclusters-ann:simclusters-ann-1:prod:pdxa"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:simclusters-ann:simclusters-ann-3:prod:atla":
+  comment: "Reject all traffic from caller id: twtr:svc:simclusters-ann:simclusters-ann-3:prod:atla"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:simclusters-ann:simclusters-ann-3:prod:pdxa":
+  comment: "Reject all traffic from caller id: twtr:svc:simclusters-ann:simclusters-ann-3:prod:pdxa"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:simclusters-ann:simclusters-ann-4:prod:atla":
+  comment: "Reject all traffic from caller id: twtr:svc:simclusters-ann:simclusters-ann-4:prod:atla"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:simclusters-ann:simclusters-ann-4:prod:pdxa":
+  comment: "Reject all traffic from caller id: twtr:svc:simclusters-ann:simclusters-ann-4:prod:pdxa"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:simclusters-ann:simclusters-ann-experimental:prod:atla":
+  comment: "Reject all traffic from caller id: twtr:svc:simclusters-ann:simclusters-ann-experimental:prod:atla"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:simclusters-ann:simclusters-ann-experimental:prod:pdxa":
+  comment: "Reject all traffic from caller id: twtr:svc:simclusters-ann:simclusters-ann-experimental:prod:pdxa"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:simclusters-ann:simclusters-ann:prod:atla":
+  comment: "Reject all traffic from caller id: twtr:svc:simclusters-ann:simclusters-ann:prod:atla"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:simclusters-ann:simclusters-ann:prod:pdxa":
+  comment: "Reject all traffic from caller id: twtr:svc:simclusters-ann:simclusters-ann:prod:pdxa"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:stratostore:stratoapi:prod:atla":
+  comment: "Reject all traffic from caller id: twtr:svc:stratostore:stratoapi:prod:atla"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:stratostore:stratoserver:prod:atla":
+  comment: "Reject all traffic from caller id: twtr:svc:stratostore:stratoserver:prod:atla"
+  default_availability: 0
+
+"representation-manager_load_shed_by_caller_id_twtr:svc:stratostore:stratoserver:prod:pdxa":
+  comment: "Reject all traffic from caller id: twtr:svc:stratostore:stratoserver:prod:pdxa"
+  default_availability: 0
+
+# ---------- Dark Traffic Proxy ----------
+representation-manager_forward_dark_traffic:
+  comment: "Defines the percentage of traffic to forward to diffy-proxy. Set to 0 to disable dark traffic forwarding"
+  default_availability: 0
--- a/representation-manager/server/src/main/resources/logback.xml
+++ b/representation-manager/server/src/main/resources/logback.xml
@ -0,0 +1,165 @@
+<configuration>
+    <shutdownHook class="ch.qos.logback.core.hook.DelayingShutdownHook"/>
+
+    <!-- ===================================================== -->
+    <!-- Service Config -->
+    <!-- ===================================================== -->
+    <property name="DEFAULT_SERVICE_PATTERN"
+              value="%-16X{traceId} %-12X{clientId:--} %-16X{method} %-25logger{0} %msg"/>
+
+    <property name="DEFAULT_ACCESS_PATTERN"
+              value="%msg"/>
+
+    <!-- ===================================================== -->
+    <!-- Common Config -->
+    <!-- ===================================================== -->
+
+    <!-- JUL/JDK14 to Logback bridge -->
+    <contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator">
+        <resetJUL>true</resetJUL>
+    </contextListener>
+
+    <!-- ====================================================================================== -->
+    <!-- NOTE: The following appenders use a simple TimeBasedRollingPolicy configuration.       -->
+    <!--       You may want to consider using a more advanced SizeAndTimeBasedRollingPolicy.    -->
+    <!--       See: https://logback.qos.ch/manual/appenders.html#SizeAndTimeBasedRollingPolicy  -->
+    <!-- ====================================================================================== -->
+
+    <!-- Service Log (rollover daily, keep maximum of 21 days of gzip compressed logs) -->
+    <appender name="SERVICE" class="ch.qos.logback.core.rolling.RollingFileAppender">
+        <file>${log.service.output}</file>
+        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
+            <!-- daily rollover -->
+            <fileNamePattern>${log.service.output}.%d.gz</fileNamePattern>
+            <!-- the maximum total size of all the log files -->
+            <totalSizeCap>3GB</totalSizeCap>
+            <!-- keep maximum 21 days' worth of history -->
+            <maxHistory>21</maxHistory>
+            <cleanHistoryOnStart>true</cleanHistoryOnStart>
+        </rollingPolicy>
+        <encoder>
+            <pattern>%date %.-3level ${DEFAULT_SERVICE_PATTERN}%n</pattern>
+        </encoder>
+    </appender>
+
+    <!-- Access Log (rollover daily, keep maximum of 21 days of gzip compressed logs) -->
+    <appender name="ACCESS" class="ch.qos.logback.core.rolling.RollingFileAppender">
+        <file>${log.access.output}</file>
+        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
+            <!-- daily rollover -->
+            <fileNamePattern>${log.access.output}.%d.gz</fileNamePattern>
+            <!-- the maximum total size of all the log files -->
+            <totalSizeCap>100MB</totalSizeCap>
+            <!-- keep maximum 7 days' worth of history -->
+            <maxHistory>7</maxHistory>
+            <cleanHistoryOnStart>true</cleanHistoryOnStart>
+        </rollingPolicy>
+        <encoder>
+            <pattern>${DEFAULT_ACCESS_PATTERN}%n</pattern>
+        </encoder>
+    </appender>
+
+    <!--LogLens -->
+    <appender name="LOGLENS" class="com.twitter.loglens.logback.LoglensAppender">
+        <mdcAdditionalContext>true</mdcAdditionalContext>
+        <category>${log.lens.category}</category>
+        <index>${log.lens.index}</index>
+        <tag>${log.lens.tag}/service</tag>
+        <encoder>
+            <pattern>%msg</pattern>
+        </encoder>
+    </appender>
+
+    <!-- LogLens Access -->
+    <appender name="LOGLENS-ACCESS" class="com.twitter.loglens.logback.LoglensAppender">
+        <mdcAdditionalContext>true</mdcAdditionalContext>
+        <category>${log.lens.category}</category>
+        <index>${log.lens.index}</index>
+        <tag>${log.lens.tag}/access</tag>
+        <encoder>
+            <pattern>%msg</pattern>
+        </encoder>
+    </appender>
+
+    <!-- Pipeline Execution Logs -->
+    <appender name="ALLOW-LISTED-PIPELINE-EXECUTIONS" class="ch.qos.logback.core.rolling.RollingFileAppender">
+        <file>allow_listed_pipeline_executions.log</file>
+        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
+            <!-- daily rollover -->
+            <fileNamePattern>allow_listed_pipeline_executions.log.%d.gz</fileNamePattern>
+             <!-- the maximum total size of all the log files -->
+            <totalSizeCap>100MB</totalSizeCap>
+            <!-- keep maximum 7 days' worth of history -->
+            <maxHistory>7</maxHistory>
+            <cleanHistoryOnStart>true</cleanHistoryOnStart>
+        </rollingPolicy>
+        <encoder>
+            <pattern>%date %.-3level ${DEFAULT_SERVICE_PATTERN}%n</pattern>
+        </encoder>
+    </appender>
+
+    <!-- ===================================================== -->
+    <!-- Primary Async Appenders -->
+    <!-- ===================================================== -->
+
+    <property name="async_queue_size" value="${queue.size:-50000}"/>
+    <property name="async_max_flush_time" value="${max.flush.time:-0}"/>
+
+    <appender name="ASYNC-SERVICE" class="com.twitter.inject.logback.AsyncAppender">
+        <queueSize>${async_queue_size}</queueSize>
+        <maxFlushTime>${async_max_flush_time}</maxFlushTime>
+        <appender-ref ref="SERVICE"/>
+    </appender>
+
+    <appender name="ASYNC-ACCESS" class="com.twitter.inject.logback.AsyncAppender">
+        <queueSize>${async_queue_size}</queueSize>
+        <maxFlushTime>${async_max_flush_time}</maxFlushTime>
+        <appender-ref ref="ACCESS"/>
+    </appender>
+
+    <appender name="ASYNC-ALLOW-LISTED-PIPELINE-EXECUTIONS" class="com.twitter.inject.logback.AsyncAppender">
+        <queueSize>${async_queue_size}</queueSize>
+        <maxFlushTime>${async_max_flush_time}</maxFlushTime>
+        <appender-ref ref="ALLOW-LISTED-PIPELINE-EXECUTIONS"/>
+    </appender>
+
+    <appender name="ASYNC-LOGLENS" class="com.twitter.inject.logback.AsyncAppender">
+        <queueSize>${async_queue_size}</queueSize>
+        <maxFlushTime>${async_max_flush_time}</maxFlushTime>
+        <appender-ref ref="LOGLENS"/>
+    </appender>
+
+    <appender name="ASYNC-LOGLENS-ACCESS" class="com.twitter.inject.logback.AsyncAppender">
+        <queueSize>${async_queue_size}</queueSize>
+        <maxFlushTime>${async_max_flush_time}</maxFlushTime>
+        <appender-ref ref="LOGLENS-ACCESS"/>
+    </appender>
+
+    <!-- ===================================================== -->
+    <!-- Package Config -->
+    <!-- ===================================================== -->
+
+    <!-- Per-Package Config -->
+    <logger name="com.twitter" level="INHERITED"/>
+    <logger name="com.twitter.wilyns" level="INHERITED"/>
+    <logger name="com.twitter.configbus.client.file" level="INHERITED"/>
+    <logger name="com.twitter.finagle.mux" level="INHERITED"/>
+    <logger name="com.twitter.finagle.serverset2" level="INHERITED"/>
+    <logger name="com.twitter.logging.ScribeHandler" level="INHERITED"/>
+    <logger name="com.twitter.zookeeper.client.internal" level="INHERITED"/>
+
+    <!-- Root Config -->
+    <!-- For all logs except access logs, disable logging below log_level level by default. This can be overriden in the per-package loggers, and dynamically in the admin panel of individual instances. -->
+    <root level="${log_level:-INFO}">
+        <appender-ref ref="ASYNC-SERVICE"/>
+        <appender-ref ref="ASYNC-LOGLENS"/>
+    </root>
+
+    <!-- Access Logging -->
+    <!-- Access logs are turned off by default -->
+    <logger name="com.twitter.finatra.thrift.filters.AccessLoggingFilter" level="OFF" additivity="false">
+        <appender-ref ref="ASYNC-ACCESS"/>
+        <appender-ref ref="ASYNC-LOGLENS-ACCESS"/>
+    </logger>
+
+</configuration>
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/BUILD
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/BUILD
@ -0,0 +1,13 @@
+scala_library(
+    compiler_option_sets = ["fatal_warnings"],
+    platform = "java8",
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "finatra/inject/inject-thrift-client",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/topic",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/tweet",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/user",
+        "strato/src/main/scala/com/twitter/strato/fed",
+        "strato/src/main/scala/com/twitter/strato/fed/server",
+    ],
+)
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/RepresentationManagerFedServer.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/RepresentationManagerFedServer.scala
@ -0,0 +1,40 @@
+package com.twitter.representation_manager
+
+import com.google.inject.Module
+import com.twitter.inject.thrift.modules.ThriftClientIdModule
+import com.twitter.representation_manager.columns.topic.LocaleEntityIdSimClustersEmbeddingCol
+import com.twitter.representation_manager.columns.topic.TopicIdSimClustersEmbeddingCol
+import com.twitter.representation_manager.columns.tweet.TweetSimClustersEmbeddingCol
+import com.twitter.representation_manager.columns.user.UserSimClustersEmbeddingCol
+import com.twitter.representation_manager.modules.CacheModule
+import com.twitter.representation_manager.modules.InterestsThriftClientModule
+import com.twitter.representation_manager.modules.LegacyRMSConfigModule
+import com.twitter.representation_manager.modules.StoreModule
+import com.twitter.representation_manager.modules.TimerModule
+import com.twitter.representation_manager.modules.UttClientModule
+import com.twitter.strato.fed._
+import com.twitter.strato.fed.server._
+
+object RepresentationManagerFedServerMain extends RepresentationManagerFedServer
+
+trait RepresentationManagerFedServer extends StratoFedServer {
+  override def dest: String = "/s/representation-manager/representation-manager"
+  override val modules: Seq[Module] =
+    Seq(
+      CacheModule,
+      InterestsThriftClientModule,
+      LegacyRMSConfigModule,
+      StoreModule,
+      ThriftClientIdModule,
+      TimerModule,
+      UttClientModule
+    )
+
+  override def columns: Seq[Class[_ <: StratoFed.Column]] =
+    Seq(
+      classOf[TweetSimClustersEmbeddingCol],
+      classOf[UserSimClustersEmbeddingCol],
+      classOf[TopicIdSimClustersEmbeddingCol],
+      classOf[LocaleEntityIdSimClustersEmbeddingCol]
+    )
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/BUILD
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/BUILD
@ -0,0 +1,9 @@
+scala_library(
+    compiler_option_sets = ["fatal_warnings"],
+    platform = "java8",
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "strato/src/main/scala/com/twitter/strato/fed",
+        "strato/src/main/scala/com/twitter/strato/fed/server",
+    ],
+)
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/ColumnConfigBase.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/ColumnConfigBase.scala
@ -0,0 +1,26 @@
+package com.twitter.representation_manager.columns
+
+import com.twitter.strato.access.Access.LdapGroup
+import com.twitter.strato.config.ContactInfo
+import com.twitter.strato.config.FromColumns
+import com.twitter.strato.config.Has
+import com.twitter.strato.config.Prefix
+import com.twitter.strato.config.ServiceIdentifierPattern
+
+object ColumnConfigBase {
+
+  /****************** Internal permissions *******************/
+  val recosPermissions: Seq[com.twitter.strato.config.Policy] = Seq()
+
+  /****************** External permissions *******************/
+  // This is used to grant limited access to members outside of RP team.
+  val externalPermissions: Seq[com.twitter.strato.config.Policy] = Seq()
+
+  val contactInfo: ContactInfo = ContactInfo(
+    description = "Please contact Relevance Platform for more details",
+    contactEmail = "no-reply@twitter.com",
+    ldapGroup = "ldap",
+    jiraProject = "JIRA",
+    links = Seq("http://go/rms-runbook")
+  )
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/topic/BUILD
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/topic/BUILD
@ -0,0 +1,14 @@
+scala_library(
+    compiler_option_sets = ["fatal_warnings"],
+    platform = "java8",
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "finatra/inject/inject-core/src/main/scala",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/columns",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/modules",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/store",
+        "representation-manager/server/src/main/thrift:thrift-scala",
+        "strato/src/main/scala/com/twitter/strato/fed",
+        "strato/src/main/scala/com/twitter/strato/fed/server",
+    ],
+)
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/topic/LocaleEntityIdSimClustersEmbeddingCol.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/topic/LocaleEntityIdSimClustersEmbeddingCol.scala
@ -0,0 +1,77 @@
+package com.twitter.representation_manager.columns.topic
+
+import com.twitter.representation_manager.columns.ColumnConfigBase
+import com.twitter.representation_manager.store.TopicSimClustersEmbeddingStore
+import com.twitter.representation_manager.thriftscala.SimClustersEmbeddingView
+import com.twitter.simclusters_v2.thriftscala.InternalId
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbedding
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbeddingId
+import com.twitter.simclusters_v2.thriftscala.LocaleEntityId
+import com.twitter.stitch
+import com.twitter.stitch.Stitch
+import com.twitter.stitch.storehaus.StitchOfReadableStore
+import com.twitter.strato.catalog.OpMetadata
+import com.twitter.strato.config.AnyOf
+import com.twitter.strato.config.ContactInfo
+import com.twitter.strato.config.FromColumns
+import com.twitter.strato.config.Policy
+import com.twitter.strato.config.Prefix
+import com.twitter.strato.data.Conv
+import com.twitter.strato.data.Description.PlainText
+import com.twitter.strato.data.Lifecycle
+import com.twitter.strato.fed._
+import com.twitter.strato.thrift.ScroogeConv
+import javax.inject.Inject
+
+class LocaleEntityIdSimClustersEmbeddingCol @Inject() (
+  embeddingStore: TopicSimClustersEmbeddingStore)
+    extends StratoFed.Column(
+      "recommendations/representation_manager/simClustersEmbedding.LocaleEntityId")
+    with StratoFed.Fetch.Stitch {
+
+  private val storeStitch: SimClustersEmbeddingId => Stitch[SimClustersEmbedding] =
+    StitchOfReadableStore(embeddingStore.topicSimClustersEmbeddingStore.mapValues(_.toThrift))
+
+  val colPermissions: Seq[com.twitter.strato.config.Policy] =
+    ColumnConfigBase.recosPermissions ++ ColumnConfigBase.externalPermissions :+ FromColumns(
+      Set(
+        Prefix("ml/featureStore/simClusters"),
+      ))
+
+  override val policy: Policy = AnyOf({
+    colPermissions
+  })
+
+  override type Key = LocaleEntityId
+  override type View = SimClustersEmbeddingView
+  override type Value = SimClustersEmbedding
+
+  override val keyConv: Conv[Key] = ScroogeConv.fromStruct[LocaleEntityId]
+  override val viewConv: Conv[View] = ScroogeConv.fromStruct[SimClustersEmbeddingView]
+  override val valueConv: Conv[Value] = ScroogeConv.fromStruct[SimClustersEmbedding]
+
+  override val contactInfo: ContactInfo = ColumnConfigBase.contactInfo
+
+  override val metadata: OpMetadata = OpMetadata(
+    lifecycle = Some(Lifecycle.Production),
+    description = Some(
+      PlainText(
+        "The Topic SimClusters Embedding Endpoint in Representation Management Service with LocaleEntityId." +
+          " TDD: http://go/rms-tdd"))
+  )
+
+  override def fetch(key: Key, view: View): Stitch[Result[Value]] = {
+    val embeddingId = SimClustersEmbeddingId(
+      view.embeddingType,
+      view.modelVersion,
+      InternalId.LocaleEntityId(key)
+    )
+
+    storeStitch(embeddingId)
+      .map(embedding => found(embedding))
+      .handle {
+        case stitch.NotFound => missing
+      }
+  }
+
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/topic/TopicIdSimClustersEmbeddingCol.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/topic/TopicIdSimClustersEmbeddingCol.scala
@ -0,0 +1,74 @@
+package com.twitter.representation_manager.columns.topic
+
+import com.twitter.representation_manager.columns.ColumnConfigBase
+import com.twitter.representation_manager.store.TopicSimClustersEmbeddingStore
+import com.twitter.representation_manager.thriftscala.SimClustersEmbeddingView
+import com.twitter.simclusters_v2.thriftscala.InternalId
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbedding
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbeddingId
+import com.twitter.simclusters_v2.thriftscala.TopicId
+import com.twitter.stitch
+import com.twitter.stitch.Stitch
+import com.twitter.stitch.storehaus.StitchOfReadableStore
+import com.twitter.strato.catalog.OpMetadata
+import com.twitter.strato.config.AnyOf
+import com.twitter.strato.config.ContactInfo
+import com.twitter.strato.config.FromColumns
+import com.twitter.strato.config.Policy
+import com.twitter.strato.config.Prefix
+import com.twitter.strato.data.Conv
+import com.twitter.strato.data.Description.PlainText
+import com.twitter.strato.data.Lifecycle
+import com.twitter.strato.fed._
+import com.twitter.strato.thrift.ScroogeConv
+import javax.inject.Inject
+
+class TopicIdSimClustersEmbeddingCol @Inject() (embeddingStore: TopicSimClustersEmbeddingStore)
+    extends StratoFed.Column("recommendations/representation_manager/simClustersEmbedding.TopicId")
+    with StratoFed.Fetch.Stitch {
+
+  private val storeStitch: SimClustersEmbeddingId => Stitch[SimClustersEmbedding] =
+    StitchOfReadableStore(embeddingStore.topicSimClustersEmbeddingStore.mapValues(_.toThrift))
+
+  val colPermissions: Seq[com.twitter.strato.config.Policy] =
+    ColumnConfigBase.recosPermissions ++ ColumnConfigBase.externalPermissions :+ FromColumns(
+      Set(
+        Prefix("ml/featureStore/simClusters"),
+      ))
+
+  override val policy: Policy = AnyOf({
+    colPermissions
+  })
+
+  override type Key = TopicId
+  override type View = SimClustersEmbeddingView
+  override type Value = SimClustersEmbedding
+
+  override val keyConv: Conv[Key] = ScroogeConv.fromStruct[TopicId]
+  override val viewConv: Conv[View] = ScroogeConv.fromStruct[SimClustersEmbeddingView]
+  override val valueConv: Conv[Value] = ScroogeConv.fromStruct[SimClustersEmbedding]
+
+  override val contactInfo: ContactInfo = ColumnConfigBase.contactInfo
+
+  override val metadata: OpMetadata = OpMetadata(
+    lifecycle = Some(Lifecycle.Production),
+    description = Some(PlainText(
+      "The Topic SimClusters Embedding Endpoint in Representation Management Service with TopicId." +
+        " TDD: http://go/rms-tdd"))
+  )
+
+  override def fetch(key: Key, view: View): Stitch[Result[Value]] = {
+    val embeddingId = SimClustersEmbeddingId(
+      view.embeddingType,
+      view.modelVersion,
+      InternalId.TopicId(key)
+    )
+
+    storeStitch(embeddingId)
+      .map(embedding => found(embedding))
+      .handle {
+        case stitch.NotFound => missing
+      }
+  }
+
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/tweet/BUILD
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/tweet/BUILD
@ -0,0 +1,14 @@
+scala_library(
+    compiler_option_sets = ["fatal_warnings"],
+    platform = "java8",
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "finatra/inject/inject-core/src/main/scala",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/columns",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/modules",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/store",
+        "representation-manager/server/src/main/thrift:thrift-scala",
+        "strato/src/main/scala/com/twitter/strato/fed",
+        "strato/src/main/scala/com/twitter/strato/fed/server",
+    ],
+)
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/tweet/TweetSimClustersEmbeddingCol.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/tweet/TweetSimClustersEmbeddingCol.scala
@ -0,0 +1,73 @@
+package com.twitter.representation_manager.columns.tweet
+
+import com.twitter.representation_manager.columns.ColumnConfigBase
+import com.twitter.representation_manager.store.TweetSimClustersEmbeddingStore
+import com.twitter.representation_manager.thriftscala.SimClustersEmbeddingView
+import com.twitter.simclusters_v2.thriftscala.InternalId
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbedding
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbeddingId
+import com.twitter.stitch
+import com.twitter.stitch.Stitch
+import com.twitter.stitch.storehaus.StitchOfReadableStore
+import com.twitter.strato.catalog.OpMetadata
+import com.twitter.strato.config.AnyOf
+import com.twitter.strato.config.ContactInfo
+import com.twitter.strato.config.FromColumns
+import com.twitter.strato.config.Policy
+import com.twitter.strato.config.Prefix
+import com.twitter.strato.data.Conv
+import com.twitter.strato.data.Description.PlainText
+import com.twitter.strato.data.Lifecycle
+import com.twitter.strato.fed._
+import com.twitter.strato.thrift.ScroogeConv
+import javax.inject.Inject
+
+class TweetSimClustersEmbeddingCol @Inject() (embeddingStore: TweetSimClustersEmbeddingStore)
+    extends StratoFed.Column("recommendations/representation_manager/simClustersEmbedding.Tweet")
+    with StratoFed.Fetch.Stitch {
+
+  private val storeStitch: SimClustersEmbeddingId => Stitch[SimClustersEmbedding] =
+    StitchOfReadableStore(embeddingStore.tweetSimClustersEmbeddingStore.mapValues(_.toThrift))
+
+  val colPermissions: Seq[com.twitter.strato.config.Policy] =
+    ColumnConfigBase.recosPermissions ++ ColumnConfigBase.externalPermissions :+ FromColumns(
+      Set(
+        Prefix("ml/featureStore/simClusters"),
+      ))
+
+  override val policy: Policy = AnyOf({
+    colPermissions
+  })
+
+  override type Key = Long // TweetId
+  override type View = SimClustersEmbeddingView
+  override type Value = SimClustersEmbedding
+
+  override val keyConv: Conv[Key] = Conv.long
+  override val viewConv: Conv[View] = ScroogeConv.fromStruct[SimClustersEmbeddingView]
+  override val valueConv: Conv[Value] = ScroogeConv.fromStruct[SimClustersEmbedding]
+
+  override val contactInfo: ContactInfo = ColumnConfigBase.contactInfo
+
+  override val metadata: OpMetadata = OpMetadata(
+    lifecycle = Some(Lifecycle.Production),
+    description = Some(
+      PlainText("The Tweet SimClusters Embedding Endpoint in Representation Management Service." +
+        " TDD: http://go/rms-tdd"))
+  )
+
+  override def fetch(key: Key, view: View): Stitch[Result[Value]] = {
+    val embeddingId = SimClustersEmbeddingId(
+      view.embeddingType,
+      view.modelVersion,
+      InternalId.TweetId(key)
+    )
+
+    storeStitch(embeddingId)
+      .map(embedding => found(embedding))
+      .handle {
+        case stitch.NotFound => missing
+      }
+  }
+
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/user/BUILD
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/user/BUILD
@ -0,0 +1,14 @@
+scala_library(
+    compiler_option_sets = ["fatal_warnings"],
+    platform = "java8",
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "finatra/inject/inject-core/src/main/scala",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/columns",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/modules",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/store",
+        "representation-manager/server/src/main/thrift:thrift-scala",
+        "strato/src/main/scala/com/twitter/strato/fed",
+        "strato/src/main/scala/com/twitter/strato/fed/server",
+    ],
+)
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/user/UserSimClustersEmbeddingCol.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/columns/user/UserSimClustersEmbeddingCol.scala
@ -0,0 +1,73 @@
+package com.twitter.representation_manager.columns.user
+
+import com.twitter.representation_manager.columns.ColumnConfigBase
+import com.twitter.representation_manager.store.UserSimClustersEmbeddingStore
+import com.twitter.representation_manager.thriftscala.SimClustersEmbeddingView
+import com.twitter.simclusters_v2.thriftscala.InternalId
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbedding
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbeddingId
+import com.twitter.stitch
+import com.twitter.stitch.Stitch
+import com.twitter.stitch.storehaus.StitchOfReadableStore
+import com.twitter.strato.catalog.OpMetadata
+import com.twitter.strato.config.AnyOf
+import com.twitter.strato.config.ContactInfo
+import com.twitter.strato.config.FromColumns
+import com.twitter.strato.config.Policy
+import com.twitter.strato.config.Prefix
+import com.twitter.strato.data.Conv
+import com.twitter.strato.data.Description.PlainText
+import com.twitter.strato.data.Lifecycle
+import com.twitter.strato.fed._
+import com.twitter.strato.thrift.ScroogeConv
+import javax.inject.Inject
+
+class UserSimClustersEmbeddingCol @Inject() (embeddingStore: UserSimClustersEmbeddingStore)
+    extends StratoFed.Column("recommendations/representation_manager/simClustersEmbedding.User")
+    with StratoFed.Fetch.Stitch {
+
+  private val storeStitch: SimClustersEmbeddingId => Stitch[SimClustersEmbedding] =
+    StitchOfReadableStore(embeddingStore.userSimClustersEmbeddingStore.mapValues(_.toThrift))
+
+  val colPermissions: Seq[com.twitter.strato.config.Policy] =
+    ColumnConfigBase.recosPermissions ++ ColumnConfigBase.externalPermissions :+ FromColumns(
+      Set(
+        Prefix("ml/featureStore/simClusters"),
+      ))
+
+  override val policy: Policy = AnyOf({
+    colPermissions
+  })
+
+  override type Key = Long // UserId
+  override type View = SimClustersEmbeddingView
+  override type Value = SimClustersEmbedding
+
+  override val keyConv: Conv[Key] = Conv.long
+  override val viewConv: Conv[View] = ScroogeConv.fromStruct[SimClustersEmbeddingView]
+  override val valueConv: Conv[Value] = ScroogeConv.fromStruct[SimClustersEmbedding]
+
+  override val contactInfo: ContactInfo = ColumnConfigBase.contactInfo
+
+  override val metadata: OpMetadata = OpMetadata(
+    lifecycle = Some(Lifecycle.Production),
+    description = Some(
+      PlainText("The User SimClusters Embedding Endpoint in Representation Management Service." +
+        " TDD: http://go/rms-tdd"))
+  )
+
+  override def fetch(key: Key, view: View): Stitch[Result[Value]] = {
+    val embeddingId = SimClustersEmbeddingId(
+      view.embeddingType,
+      view.modelVersion,
+      InternalId.UserId(key)
+    )
+
+    storeStitch(embeddingId)
+      .map(embedding => found(embedding))
+      .handle {
+        case stitch.NotFound => missing
+      }
+  }
+
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/common/BUILD
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/common/BUILD
@ -0,0 +1,13 @@
+scala_library(
+    compiler_option_sets = ["fatal_warnings"],
+    platform = "java8",
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "decider/src/main/scala",
+        "finagle/finagle-memcached",
+        "hermit/hermit-core/src/main/scala/com/twitter/hermit/store/common",
+        "relevance-platform/src/main/scala/com/twitter/relevance_platform/common/injection",
+        "src/scala/com/twitter/simclusters_v2/common",
+        "src/thrift/com/twitter/simclusters_v2:simclusters_v2-thrift-scala",
+    ],
+)
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/common/MemCacheConfig.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/common/MemCacheConfig.scala
@ -0,0 +1,153 @@
+package com.twitter.representation_manager.common
+
+import com.twitter.bijection.scrooge.BinaryScalaCodec
+import com.twitter.conversions.DurationOps._
+import com.twitter.finagle.memcached.Client
+import com.twitter.finagle.stats.StatsReceiver
+import com.twitter.hashing.KeyHasher
+import com.twitter.hermit.store.common.ObservedMemcachedReadableStore
+import com.twitter.relevance_platform.common.injection.LZ4Injection
+import com.twitter.simclusters_v2.common.SimClustersEmbedding
+import com.twitter.simclusters_v2.common.SimClustersEmbeddingIdCacheKeyBuilder
+import com.twitter.simclusters_v2.thriftscala.EmbeddingType
+import com.twitter.simclusters_v2.thriftscala.EmbeddingType._
+import com.twitter.simclusters_v2.thriftscala.ModelVersion
+import com.twitter.simclusters_v2.thriftscala.ModelVersion._
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbeddingId
+import com.twitter.simclusters_v2.thriftscala.{SimClustersEmbedding => ThriftSimClustersEmbedding}
+import com.twitter.storehaus.ReadableStore
+import com.twitter.util.Duration
+
+/*
+ * NOTE - ALL the cache configs here are just placeholders, NONE of them is used anyweher in RMS yet
+ * */
+sealed trait MemCacheParams
+sealed trait MemCacheConfig
+
+/*
+ * This holds params that is required to set up a memcache cache for a single embedding store
+ * */
+case class EnabledMemCacheParams(ttl: Duration) extends MemCacheParams
+object DisabledMemCacheParams extends MemCacheParams
+
+/*
+ * We use this MemcacheConfig as the single source to set up the memcache for all RMS use cases
+ * NO OVERRIDE FROM CLIENT
+ * */
+object MemCacheConfig {
+  val keyHasher: KeyHasher = KeyHasher.FNV1A_64
+  val hashKeyPrefix: String = "RMS"
+  val simclustersEmbeddingCacheKeyBuilder =
+    SimClustersEmbeddingIdCacheKeyBuilder(keyHasher.hashKey, hashKeyPrefix)
+
+  val cacheParamsMap: Map[
+    (EmbeddingType, ModelVersion),
+    MemCacheParams
+  ] = Map(
+    // Tweet Embeddings
+    (LogFavBasedTweet, Model20m145kUpdated) -> EnabledMemCacheParams(ttl = 10.minutes),
+    (LogFavBasedTweet, Model20m145k2020) -> EnabledMemCacheParams(ttl = 10.minutes),
+    (LogFavLongestL2EmbeddingTweet, Model20m145kUpdated) -> EnabledMemCacheParams(ttl = 10.minutes),
+    (LogFavLongestL2EmbeddingTweet, Model20m145k2020) -> EnabledMemCacheParams(ttl = 10.minutes),
+    // User - KnownFor Embeddings
+    (FavBasedProducer, Model20m145kUpdated) -> EnabledMemCacheParams(ttl = 12.hours),
+    (FavBasedProducer, Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (FollowBasedProducer, Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (AggregatableLogFavBasedProducer, Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (RelaxedAggregatableLogFavBasedProducer, Model20m145kUpdated) -> EnabledMemCacheParams(ttl =
+      12.hours),
+    (RelaxedAggregatableLogFavBasedProducer, Model20m145k2020) -> EnabledMemCacheParams(ttl =
+      12.hours),
+    // User - InterestedIn Embeddings
+    (LogFavBasedUserInterestedInFromAPE, Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (FollowBasedUserInterestedInFromAPE, Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (FavBasedUserInterestedIn, Model20m145kUpdated) -> EnabledMemCacheParams(ttl = 12.hours),
+    (FavBasedUserInterestedIn, Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (FollowBasedUserInterestedIn, Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (LogFavBasedUserInterestedIn, Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (FavBasedUserInterestedInFromPE, Model20m145kUpdated) -> EnabledMemCacheParams(ttl = 12.hours),
+    (FilteredUserInterestedIn, Model20m145kUpdated) -> EnabledMemCacheParams(ttl = 12.hours),
+    (FilteredUserInterestedIn, Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (FilteredUserInterestedInFromPE, Model20m145kUpdated) -> EnabledMemCacheParams(ttl = 12.hours),
+    (UnfilteredUserInterestedIn, Model20m145kUpdated) -> EnabledMemCacheParams(ttl = 12.hours),
+    (UnfilteredUserInterestedIn, Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (UserNextInterestedIn, Model20m145k2020) -> EnabledMemCacheParams(ttl =
+      30.minutes), //embedding is updated every 2 hours, keeping it lower to avoid staleness
+    (
+      LogFavBasedUserInterestedMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (
+      LogFavBasedUserInterestedAverageAddressBookFromIIAPE,
+      Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (
+      LogFavBasedUserInterestedBooktypeMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (
+      LogFavBasedUserInterestedLargestDimMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (
+      LogFavBasedUserInterestedLouvainMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (
+      LogFavBasedUserInterestedConnectedMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    // Topic Embeddings
+    (FavTfgTopic, Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+    (LogFavBasedKgoApeTopic, Model20m145k2020) -> EnabledMemCacheParams(ttl = 12.hours),
+  )
+
+  def getCacheSetup(
+    embeddingType: EmbeddingType,
+    modelVersion: ModelVersion
+  ): MemCacheParams = {
+    // When requested (embeddingType, modelVersion) doesn't exist, we return DisabledMemCacheParams
+    cacheParamsMap.getOrElse((embeddingType, modelVersion), DisabledMemCacheParams)
+  }
+
+  def getCacheKeyPrefix(embeddingType: EmbeddingType, modelVersion: ModelVersion) =
+    s"${embeddingType.value}_${modelVersion.value}_"
+
+  def getStatsName(embeddingType: EmbeddingType, modelVersion: ModelVersion) =
+    s"${embeddingType.name}_${modelVersion.name}_mem_cache"
+
+  /**
+   * Build a ReadableStore based on MemCacheConfig.
+   *
+   * If memcache is disabled, it will return a normal readable store wrapper of the rawStore,
+   * with SimClustersEmbedding as value;
+   * If memcache is enabled, it will return a ObservedMemcachedReadableStore wrapper of the rawStore,
+   * with memcache set up according to the EnabledMemCacheParams
+   * */
+  def buildMemCacheStoreForSimClustersEmbedding(
+    rawStore: ReadableStore[SimClustersEmbeddingId, ThriftSimClustersEmbedding],
+    cacheClient: Client,
+    embeddingType: EmbeddingType,
+    modelVersion: ModelVersion,
+    stats: StatsReceiver
+  ): ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+    val cacheParams = getCacheSetup(embeddingType, modelVersion)
+    val store = cacheParams match {
+      case DisabledMemCacheParams => rawStore
+      case EnabledMemCacheParams(ttl) =>
+        val memCacheKeyPrefix = MemCacheConfig.getCacheKeyPrefix(
+          embeddingType,
+          modelVersion
+        )
+        val statsName = MemCacheConfig.getStatsName(
+          embeddingType,
+          modelVersion
+        )
+        ObservedMemcachedReadableStore.fromCacheClient(
+          backingStore = rawStore,
+          cacheClient = cacheClient,
+          ttl = ttl
+        )(
+          valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+          statsReceiver = stats.scope(statsName),
+          keyToString = { k => memCacheKeyPrefix + k.toString }
+        )
+    }
+    store.mapValues(SimClustersEmbedding(_))
+  }
+
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/common/RepresentationManagerDecider.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/common/RepresentationManagerDecider.scala
@ -0,0 +1,25 @@
+package com.twitter.representation_manager.common
+
+import com.twitter.decider.Decider
+import com.twitter.decider.RandomRecipient
+import com.twitter.decider.Recipient
+import com.twitter.simclusters_v2.common.DeciderGateBuilderWithIdHashing
+import javax.inject.Inject
+
+case class RepresentationManagerDecider @Inject() (decider: Decider) {
+
+  val deciderGateBuilder = new DeciderGateBuilderWithIdHashing(decider)
+
+  def isAvailable(feature: String, recipient: Option[Recipient]): Boolean = {
+    decider.isAvailable(feature, recipient)
+  }
+
+  /**
+   * When useRandomRecipient is set to false, the decider is either completely on or off.
+   * When useRandomRecipient is set to true, the decider is on for the specified % of traffic.
+   */
+  def isAvailable(feature: String, useRandomRecipient: Boolean = true): Boolean = {
+    if (useRandomRecipient) isAvailable(feature, Some(RandomRecipient))
+    else isAvailable(feature, None)
+  }
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/migration/BUILD
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/migration/BUILD
@ -0,0 +1,25 @@
+scala_library(
+    compiler_option_sets = ["fatal_warnings"],
+    platform = "java8",
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "content-recommender/server/src/main/scala/com/twitter/contentrecommender:representation-manager-deps",
+        "frigate/frigate-common/src/main/scala/com/twitter/frigate/common/store/strato",
+        "frigate/frigate-common/src/main/scala/com/twitter/frigate/common/util",
+        "hermit/hermit-core/src/main/scala/com/twitter/hermit/store/common",
+        "relevance-platform/src/main/scala/com/twitter/relevance_platform/common/injection",
+        "relevance-platform/src/main/scala/com/twitter/relevance_platform/common/readablestore",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/common",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/store",
+        "src/scala/com/twitter/ml/api/embedding",
+        "src/scala/com/twitter/simclusters_v2/common",
+        "src/scala/com/twitter/simclusters_v2/score",
+        "src/scala/com/twitter/simclusters_v2/summingbird/stores",
+        "src/scala/com/twitter/storehaus_internal/manhattan",
+        "src/scala/com/twitter/storehaus_internal/util",
+        "src/thrift/com/twitter/simclusters_v2:simclusters_v2-thrift-scala",
+        "src/thrift/com/twitter/socialgraph:thrift-scala",
+        "storage/clients/manhattan/client/src/main/scala",
+        "tweetypie/src/scala/com/twitter/tweetypie/util",
+    ],
+)
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/migration/LegacyRMS.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/migration/LegacyRMS.scala
@ -0,0 +1,846 @@
+package com.twitter.representation_manager.migration
+
+import com.twitter.bijection.Injection
+import com.twitter.bijection.scrooge.BinaryScalaCodec
+import com.twitter.contentrecommender.store.ApeEntityEmbeddingStore
+import com.twitter.contentrecommender.store.InterestsOptOutStore
+import com.twitter.contentrecommender.store.SemanticCoreTopicSeedStore
+import com.twitter.contentrecommender.twistly
+import com.twitter.conversions.DurationOps._
+import com.twitter.decider.Decider
+import com.twitter.escherbird.util.uttclient.CacheConfigV2
+import com.twitter.escherbird.util.uttclient.CachedUttClientV2
+import com.twitter.escherbird.util.uttclient.UttClientCacheConfigsV2
+import com.twitter.escherbird.utt.strato.thriftscala.Environment
+import com.twitter.finagle.ThriftMux
+import com.twitter.finagle.memcached.Client
+import com.twitter.finagle.mtls.authentication.ServiceIdentifier
+import com.twitter.finagle.mtls.client.MtlsStackClient.MtlsThriftMuxClientSyntax
+import com.twitter.finagle.mux.ClientDiscardedRequestException
+import com.twitter.finagle.service.ReqRep
+import com.twitter.finagle.service.ResponseClass
+import com.twitter.finagle.stats.StatsReceiver
+import com.twitter.finagle.thrift.ClientId
+import com.twitter.frigate.common.store.strato.StratoFetchableStore
+import com.twitter.frigate.common.util.SeqLongInjection
+import com.twitter.hashing.KeyHasher
+import com.twitter.hermit.store.common.DeciderableReadableStore
+import com.twitter.hermit.store.common.ObservedCachedReadableStore
+import com.twitter.hermit.store.common.ObservedMemcachedReadableStore
+import com.twitter.hermit.store.common.ObservedReadableStore
+import com.twitter.interests.thriftscala.InterestsThriftService
+import com.twitter.relevance_platform.common.injection.LZ4Injection
+import com.twitter.relevance_platform.common.readablestore.ReadableStoreWithTimeout
+import com.twitter.representation_manager.common.RepresentationManagerDecider
+import com.twitter.representation_manager.store.DeciderConstants
+import com.twitter.representation_manager.store.DeciderKey
+import com.twitter.simclusters_v2.common.ModelVersions
+import com.twitter.simclusters_v2.common.SimClustersEmbedding
+import com.twitter.simclusters_v2.common.SimClustersEmbeddingIdCacheKeyBuilder
+import com.twitter.simclusters_v2.stores.SimClustersEmbeddingStore
+import com.twitter.simclusters_v2.summingbird.stores.PersistentTweetEmbeddingStore
+import com.twitter.simclusters_v2.summingbird.stores.ProducerClusterEmbeddingReadableStores
+import com.twitter.simclusters_v2.summingbird.stores.UserInterestedInReadableStore
+import com.twitter.simclusters_v2.thriftscala.ClustersUserIsInterestedIn
+import com.twitter.simclusters_v2.thriftscala.EmbeddingType
+import com.twitter.simclusters_v2.thriftscala.EmbeddingType._
+import com.twitter.simclusters_v2.thriftscala.InternalId
+import com.twitter.simclusters_v2.thriftscala.ModelVersion
+import com.twitter.simclusters_v2.thriftscala.ModelVersion.Model20m145k2020
+import com.twitter.simclusters_v2.thriftscala.ModelVersion.Model20m145kUpdated
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbeddingId
+import com.twitter.simclusters_v2.thriftscala.SimClustersMultiEmbedding
+import com.twitter.simclusters_v2.thriftscala.SimClustersMultiEmbeddingId
+import com.twitter.simclusters_v2.thriftscala.{SimClustersEmbedding => ThriftSimClustersEmbedding}
+import com.twitter.storage.client.manhattan.kv.ManhattanKVClientMtlsParams
+import com.twitter.storehaus.ReadableStore
+import com.twitter.storehaus_internal.manhattan.Athena
+import com.twitter.storehaus_internal.manhattan.ManhattanRO
+import com.twitter.storehaus_internal.manhattan.ManhattanROConfig
+import com.twitter.storehaus_internal.util.ApplicationID
+import com.twitter.storehaus_internal.util.DatasetName
+import com.twitter.storehaus_internal.util.HDFSPath
+import com.twitter.strato.client.Strato
+import com.twitter.strato.client.{Client => StratoClient}
+import com.twitter.strato.thrift.ScroogeConvImplicits._
+import com.twitter.tweetypie.util.UserId
+import com.twitter.util.Duration
+import com.twitter.util.Future
+import com.twitter.util.Throw
+import com.twitter.util.Timer
+import javax.inject.Inject
+import javax.inject.Named
+import scala.reflect.ClassTag
+
+class LegacyRMS @Inject() (
+  serviceIdentifier: ServiceIdentifier,
+  cacheClient: Client,
+  stats: StatsReceiver,
+  decider: Decider,
+  clientId: ClientId,
+  timer: Timer,
+  @Named("cacheHashKeyPrefix") val cacheHashKeyPrefix: String = "RMS",
+  @Named("useContentRecommenderConfiguration") val useContentRecommenderConfiguration: Boolean =
+    false) {
+
+  private val mhMtlsParams: ManhattanKVClientMtlsParams = ManhattanKVClientMtlsParams(
+    serviceIdentifier)
+  private val rmsDecider = RepresentationManagerDecider(decider)
+  val keyHasher: KeyHasher = KeyHasher.FNV1A_64
+
+  private val embeddingCacheKeyBuilder =
+    SimClustersEmbeddingIdCacheKeyBuilder(keyHasher.hashKey, cacheHashKeyPrefix)
+  private val statsReceiver = stats.scope("representation_management")
+
+  // Strato client, default timeout = 280ms
+  val stratoClient: StratoClient =
+    Strato.client
+      .withMutualTls(serviceIdentifier)
+      .build()
+
+  // Builds ThriftMux client builder for Content-Recommender service
+  private def makeThriftClientBuilder(
+    requestTimeout: Duration
+  ): ThriftMux.Client = {
+    ThriftMux.client
+      .withClientId(clientId)
+      .withMutualTls(serviceIdentifier)
+      .withRequestTimeout(requestTimeout)
+      .withStatsReceiver(statsReceiver.scope("clnt"))
+      .withResponseClassifier {
+        case ReqRep(_, Throw(_: ClientDiscardedRequestException)) => ResponseClass.Ignorable
+      }
+  }
+
+  private def makeThriftClient[ThriftServiceType: ClassTag](
+    dest: String,
+    label: String,
+    requestTimeout: Duration = 450.milliseconds
+  ): ThriftServiceType = {
+    makeThriftClientBuilder(requestTimeout)
+      .build[ThriftServiceType](dest, label)
+  }
+
+  /** *** SimCluster Embedding Stores ******/
+  implicit val simClustersEmbeddingIdInjection: Injection[SimClustersEmbeddingId, Array[Byte]] =
+    BinaryScalaCodec(SimClustersEmbeddingId)
+  implicit val simClustersEmbeddingInjection: Injection[ThriftSimClustersEmbedding, Array[Byte]] =
+    BinaryScalaCodec(ThriftSimClustersEmbedding)
+  implicit val simClustersMultiEmbeddingInjection: Injection[SimClustersMultiEmbedding, Array[
+    Byte
+  ]] =
+    BinaryScalaCodec(SimClustersMultiEmbedding)
+  implicit val simClustersMultiEmbeddingIdInjection: Injection[SimClustersMultiEmbeddingId, Array[
+    Byte
+  ]] =
+    BinaryScalaCodec(SimClustersMultiEmbeddingId)
+
+  def getEmbeddingsDataset(
+    mhMtlsParams: ManhattanKVClientMtlsParams,
+    datasetName: String
+  ): ReadableStore[SimClustersEmbeddingId, ThriftSimClustersEmbedding] = {
+    ManhattanRO.getReadableStoreWithMtls[SimClustersEmbeddingId, ThriftSimClustersEmbedding](
+      ManhattanROConfig(
+        HDFSPath(""), // not needed
+        ApplicationID("content_recommender_athena"),
+        DatasetName(datasetName), // this should be correct
+        Athena
+      ),
+      mhMtlsParams
+    )
+  }
+
+  lazy val logFavBasedLongestL2Tweet20M145K2020EmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore =
+      PersistentTweetEmbeddingStore
+        .longestL2NormTweetEmbeddingStoreManhattan(
+          mhMtlsParams,
+          PersistentTweetEmbeddingStore.LogFavBased20m145k2020Dataset,
+          statsReceiver,
+          maxLength = 10,
+        ).mapValues(_.toThrift)
+
+    val memcachedStore = ObservedMemcachedReadableStore.fromCacheClient(
+      backingStore = rawStore,
+      cacheClient = cacheClient,
+      ttl = 15.minutes
+    )(
+      valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+      statsReceiver =
+        statsReceiver.scope("log_fav_based_longest_l2_tweet_embedding_20m145k2020_mem_cache"),
+      keyToString = { k =>
+        s"scez_l2:${LogFavBasedTweet}_${ModelVersions.Model20M145K2020}_$k"
+      }
+    )
+
+    val inMemoryCacheStore: ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] =
+      memcachedStore
+        .composeKeyMapping[SimClustersEmbeddingId] {
+          case SimClustersEmbeddingId(
+                LogFavLongestL2EmbeddingTweet,
+                Model20m145k2020,
+                InternalId.TweetId(tweetId)) =>
+            tweetId
+        }
+        .mapValues(SimClustersEmbedding(_))
+
+    ObservedCachedReadableStore.from[SimClustersEmbeddingId, SimClustersEmbedding](
+      inMemoryCacheStore,
+      ttl = 12.minute,
+      maxKeys = 1048575,
+      cacheName = "log_fav_based_longest_l2_tweet_embedding_20m145k2020_cache",
+      windowSize = 10000L
+    )(statsReceiver.scope("log_fav_based_longest_l2_tweet_embedding_20m145k2020_store"))
+  }
+
+  lazy val logFavBased20M145KUpdatedTweetEmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore =
+      PersistentTweetEmbeddingStore
+        .mostRecentTweetEmbeddingStoreManhattan(
+          mhMtlsParams,
+          PersistentTweetEmbeddingStore.LogFavBased20m145kUpdatedDataset,
+          statsReceiver
+        ).mapValues(_.toThrift)
+
+    val memcachedStore = ObservedMemcachedReadableStore.fromCacheClient(
+      backingStore = rawStore,
+      cacheClient = cacheClient,
+      ttl = 10.minutes
+    )(
+      valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+      statsReceiver = statsReceiver.scope("log_fav_based_tweet_embedding_mem_cache"),
+      keyToString = { k =>
+        // SimClusters_embedding_LZ4/embeddingType_modelVersion_tweetId
+        s"scez:${LogFavBasedTweet}_${ModelVersions.Model20M145KUpdated}_$k"
+      }
+    )
+
+    val inMemoryCacheStore: ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+      memcachedStore
+        .composeKeyMapping[SimClustersEmbeddingId] {
+          case SimClustersEmbeddingId(
+                LogFavBasedTweet,
+                Model20m145kUpdated,
+                InternalId.TweetId(tweetId)) =>
+            tweetId
+        }
+        .mapValues(SimClustersEmbedding(_))
+    }
+
+    ObservedCachedReadableStore.from[SimClustersEmbeddingId, SimClustersEmbedding](
+      inMemoryCacheStore,
+      ttl = 5.minute,
+      maxKeys = 1048575, // 200MB
+      cacheName = "log_fav_based_tweet_embedding_cache",
+      windowSize = 10000L
+    )(statsReceiver.scope("log_fav_based_tweet_embedding_store"))
+  }
+
+  lazy val logFavBased20M145K2020TweetEmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore =
+      PersistentTweetEmbeddingStore
+        .mostRecentTweetEmbeddingStoreManhattan(
+          mhMtlsParams,
+          PersistentTweetEmbeddingStore.LogFavBased20m145k2020Dataset,
+          statsReceiver,
+          maxLength = 10,
+        ).mapValues(_.toThrift)
+
+    val memcachedStore = ObservedMemcachedReadableStore.fromCacheClient(
+      backingStore = rawStore,
+      cacheClient = cacheClient,
+      ttl = 15.minutes
+    )(
+      valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+      statsReceiver = statsReceiver.scope("log_fav_based_tweet_embedding_20m145k2020_mem_cache"),
+      keyToString = { k =>
+        // SimClusters_embedding_LZ4/embeddingType_modelVersion_tweetId
+        s"scez:${LogFavBasedTweet}_${ModelVersions.Model20M145K2020}_$k"
+      }
+    )
+
+    val inMemoryCacheStore: ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] =
+      memcachedStore
+        .composeKeyMapping[SimClustersEmbeddingId] {
+          case SimClustersEmbeddingId(
+                LogFavBasedTweet,
+                Model20m145k2020,
+                InternalId.TweetId(tweetId)) =>
+            tweetId
+        }
+        .mapValues(SimClustersEmbedding(_))
+
+    ObservedCachedReadableStore.from[SimClustersEmbeddingId, SimClustersEmbedding](
+      inMemoryCacheStore,
+      ttl = 12.minute,
+      maxKeys = 16777215,
+      cacheName = "log_fav_based_tweet_embedding_20m145k2020_cache",
+      windowSize = 10000L
+    )(statsReceiver.scope("log_fav_based_tweet_embedding_20m145k2020_store"))
+  }
+
+  lazy val favBasedTfgTopicEmbedding2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val stratoStore =
+      StratoFetchableStore
+        .withUnitView[SimClustersEmbeddingId, ThriftSimClustersEmbedding](
+          stratoClient,
+          "recommendations/simclusters_v2/embeddings/favBasedTFGTopic20M145K2020")
+
+    val truncatedStore = stratoStore.mapValues { embedding =>
+      SimClustersEmbedding(embedding, truncate = 50)
+    }
+
+    ObservedCachedReadableStore.from(
+      ObservedReadableStore(truncatedStore)(
+        statsReceiver.scope("fav_tfg_topic_embedding_2020_cache_backing_store")),
+      ttl = 12.hours,
+      maxKeys = 262143, // 200MB
+      cacheName = "fav_tfg_topic_embedding_2020_cache",
+      windowSize = 10000L
+    )(statsReceiver.scope("fav_tfg_topic_embedding_2020_cache"))
+  }
+
+  lazy val logFavBasedApe20M145K2020EmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    ObservedReadableStore(
+      StratoFetchableStore
+        .withUnitView[SimClustersEmbeddingId, ThriftSimClustersEmbedding](
+          stratoClient,
+          "recommendations/simclusters_v2/embeddings/logFavBasedAPE20M145K2020")
+        .composeKeyMapping[SimClustersEmbeddingId] {
+          case SimClustersEmbeddingId(
+                AggregatableLogFavBasedProducer,
+                Model20m145k2020,
+                internalId) =>
+            SimClustersEmbeddingId(AggregatableLogFavBasedProducer, Model20m145k2020, internalId)
+        }
+        .mapValues(embedding => SimClustersEmbedding(embedding, 50))
+    )(statsReceiver.scope("aggregatable_producer_embeddings_by_logfav_score_2020"))
+  }
+
+  val interestService: InterestsThriftService.MethodPerEndpoint =
+    makeThriftClient[InterestsThriftService.MethodPerEndpoint](
+      "/s/interests-thrift-service/interests-thrift-service",
+      "interests_thrift_service"
+    )
+
+  val interestsOptOutStore: InterestsOptOutStore = InterestsOptOutStore(interestService)
+
+  // Save 2 ^ 18 UTTs. Promising 100% cache rate
+  lazy val defaultCacheConfigV2: CacheConfigV2 = CacheConfigV2(262143)
+  lazy val uttClientCacheConfigsV2: UttClientCacheConfigsV2 = UttClientCacheConfigsV2(
+    getTaxonomyConfig = defaultCacheConfigV2,
+    getUttTaxonomyConfig = defaultCacheConfigV2,
+    getLeafIds = defaultCacheConfigV2,
+    getLeafUttEntities = defaultCacheConfigV2
+  )
+
+  // CachedUttClient to use StratoClient
+  lazy val cachedUttClientV2: CachedUttClientV2 = new CachedUttClientV2(
+    stratoClient = stratoClient,
+    env = Environment.Prod,
+    cacheConfigs = uttClientCacheConfigsV2,
+    statsReceiver = statsReceiver.scope("cached_utt_client")
+  )
+
+  lazy val semanticCoreTopicSeedStore: ReadableStore[
+    SemanticCoreTopicSeedStore.Key,
+    Seq[UserId]
+  ] = {
+    /*
+      Up to 1000 Long seeds per topic/language = 62.5kb per topic/language (worst case)
+      Assume ~10k active topic/languages ~= 650MB (worst case)
+     */
+    val underlying = new SemanticCoreTopicSeedStore(cachedUttClientV2, interestsOptOutStore)(
+      statsReceiver.scope("semantic_core_topic_seed_store"))
+
+    val memcacheStore = ObservedMemcachedReadableStore.fromCacheClient(
+      backingStore = underlying,
+      cacheClient = cacheClient,
+      ttl = 12.hours
+    )(
+      valueInjection = SeqLongInjection,
+      statsReceiver = statsReceiver.scope("topic_producer_seed_store_mem_cache"),
+      keyToString = { k => s"tpss:${k.entityId}_${k.languageCode}" }
+    )
+
+    ObservedCachedReadableStore.from[SemanticCoreTopicSeedStore.Key, Seq[UserId]](
+      store = memcacheStore,
+      ttl = 6.hours,
+      maxKeys = 20e3.toInt,
+      cacheName = "topic_producer_seed_store_cache",
+      windowSize = 5000
+    )(statsReceiver.scope("topic_producer_seed_store_cache"))
+  }
+
+  lazy val logFavBasedApeEntity20M145K2020EmbeddingStore: ApeEntityEmbeddingStore = {
+    val apeStore = logFavBasedApe20M145K2020EmbeddingStore.composeKeyMapping[UserId]({ id =>
+      SimClustersEmbeddingId(
+        AggregatableLogFavBasedProducer,
+        Model20m145k2020,
+        InternalId.UserId(id))
+    })
+
+    new ApeEntityEmbeddingStore(
+      semanticCoreSeedStore = semanticCoreTopicSeedStore,
+      aggregatableProducerEmbeddingStore = apeStore,
+      statsReceiver = statsReceiver.scope("log_fav_based_ape_entity_2020_embedding_store"))
+  }
+
+  lazy val logFavBasedApeEntity20M145K2020EmbeddingCachedStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val truncatedStore =
+      logFavBasedApeEntity20M145K2020EmbeddingStore.mapValues(_.truncate(50).toThrift)
+
+    val memcachedStore = ObservedMemcachedReadableStore
+      .fromCacheClient(
+        backingStore = truncatedStore,
+        cacheClient = cacheClient,
+        ttl = 12.hours
+      )(
+        valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+        statsReceiver = statsReceiver.scope("log_fav_based_ape_entity_2020_embedding_mem_cache"),
+        keyToString = { k => embeddingCacheKeyBuilder.apply(k) }
+      ).mapValues(SimClustersEmbedding(_))
+
+    val inMemoryCachedStore =
+      ObservedCachedReadableStore.from[SimClustersEmbeddingId, SimClustersEmbedding](
+        memcachedStore,
+        ttl = 6.hours,
+        maxKeys = 262143,
+        cacheName = "log_fav_based_ape_entity_2020_embedding_cache",
+        windowSize = 10000L
+      )(statsReceiver.scope("log_fav_based_ape_entity_2020_embedding_cached_store"))
+
+    DeciderableReadableStore(
+      inMemoryCachedStore,
+      rmsDecider.deciderGateBuilder.idGateWithHashing[SimClustersEmbeddingId](
+        DeciderKey.enableLogFavBasedApeEntity20M145K2020EmbeddingCachedStore),
+      statsReceiver.scope("log_fav_based_ape_entity_2020_embedding_deciderable_store")
+    )
+  }
+
+  lazy val relaxedLogFavBasedApe20M145K2020EmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    ObservedReadableStore(
+      StratoFetchableStore
+        .withUnitView[SimClustersEmbeddingId, ThriftSimClustersEmbedding](
+          stratoClient,
+          "recommendations/simclusters_v2/embeddings/logFavBasedAPERelaxedFavEngagementThreshold20M145K2020")
+        .composeKeyMapping[SimClustersEmbeddingId] {
+          case SimClustersEmbeddingId(
+                RelaxedAggregatableLogFavBasedProducer,
+                Model20m145k2020,
+                internalId) =>
+            SimClustersEmbeddingId(
+              RelaxedAggregatableLogFavBasedProducer,
+              Model20m145k2020,
+              internalId)
+        }
+        .mapValues(embedding => SimClustersEmbedding(embedding).truncate(50))
+    )(statsReceiver.scope(
+      "aggregatable_producer_embeddings_by_logfav_score_relaxed_fav_engagement_threshold_2020"))
+  }
+
+  lazy val relaxedLogFavBasedApe20M145K2020EmbeddingCachedStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val truncatedStore =
+      relaxedLogFavBasedApe20M145K2020EmbeddingStore.mapValues(_.truncate(50).toThrift)
+
+    val memcachedStore = ObservedMemcachedReadableStore
+      .fromCacheClient(
+        backingStore = truncatedStore,
+        cacheClient = cacheClient,
+        ttl = 12.hours
+      )(
+        valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+        statsReceiver =
+          statsReceiver.scope("relaxed_log_fav_based_ape_entity_2020_embedding_mem_cache"),
+        keyToString = { k: SimClustersEmbeddingId => embeddingCacheKeyBuilder.apply(k) }
+      ).mapValues(SimClustersEmbedding(_))
+
+    ObservedCachedReadableStore.from[SimClustersEmbeddingId, SimClustersEmbedding](
+      memcachedStore,
+      ttl = 6.hours,
+      maxKeys = 262143,
+      cacheName = "relaxed_log_fav_based_ape_entity_2020_embedding_cache",
+      windowSize = 10000L
+    )(statsReceiver.scope("relaxed_log_fav_based_ape_entity_2020_embedding_cache_store"))
+  }
+
+  lazy val favBasedProducer20M145K2020EmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val underlyingStore = ProducerClusterEmbeddingReadableStores
+      .getProducerTopKSimClusters2020EmbeddingsStore(
+        mhMtlsParams
+      ).composeKeyMapping[SimClustersEmbeddingId] {
+        case SimClustersEmbeddingId(
+              FavBasedProducer,
+              Model20m145k2020,
+              InternalId.UserId(userId)) =>
+          userId
+      }.mapValues { topSimClustersWithScore =>
+        ThriftSimClustersEmbedding(topSimClustersWithScore.topClusters.take(10))
+      }
+
+    // same memcache config as for favBasedUserInterestedIn20M145K2020Store
+    val memcachedStore = ObservedMemcachedReadableStore
+      .fromCacheClient(
+        backingStore = underlyingStore,
+        cacheClient = cacheClient,
+        ttl = 24.hours
+      )(
+        valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+        statsReceiver = statsReceiver.scope("fav_based_producer_embedding_20M_145K_2020_mem_cache"),
+        keyToString = { k => embeddingCacheKeyBuilder.apply(k) }
+      ).mapValues(SimClustersEmbedding(_))
+
+    ObservedCachedReadableStore.from[SimClustersEmbeddingId, SimClustersEmbedding](
+      memcachedStore,
+      ttl = 12.hours,
+      maxKeys = 16777215,
+      cacheName = "fav_based_producer_embedding_20M_145K_2020_embedding_cache",
+      windowSize = 10000L
+    )(statsReceiver.scope("fav_based_producer_embedding_20M_145K_2020_embedding_store"))
+  }
+
+  // Production
+  lazy val interestedIn20M145KUpdatedStore: ReadableStore[UserId, ClustersUserIsInterestedIn] = {
+    UserInterestedInReadableStore.defaultStoreWithMtls(
+      mhMtlsParams,
+      modelVersion = ModelVersions.Model20M145KUpdated
+    )
+  }
+
+  // Production
+  lazy val interestedIn20M145K2020Store: ReadableStore[UserId, ClustersUserIsInterestedIn] = {
+    UserInterestedInReadableStore.defaultStoreWithMtls(
+      mhMtlsParams,
+      modelVersion = ModelVersions.Model20M145K2020
+    )
+  }
+
+  // Production
+  lazy val InterestedInFromPE20M145KUpdatedStore: ReadableStore[
+    UserId,
+    ClustersUserIsInterestedIn
+  ] = {
+    UserInterestedInReadableStore.defaultIIPEStoreWithMtls(
+      mhMtlsParams,
+      modelVersion = ModelVersions.Model20M145KUpdated)
+  }
+
+  lazy val simClustersInterestedInStore: ReadableStore[
+    (UserId, ModelVersion),
+    ClustersUserIsInterestedIn
+  ] = {
+    new ReadableStore[(UserId, ModelVersion), ClustersUserIsInterestedIn] {
+      override def get(k: (UserId, ModelVersion)): Future[Option[ClustersUserIsInterestedIn]] = {
+        k match {
+          case (userId, Model20m145kUpdated) =>
+            interestedIn20M145KUpdatedStore.get(userId)
+          case (userId, Model20m145k2020) =>
+            interestedIn20M145K2020Store.get(userId)
+          case _ =>
+            Future.None
+        }
+      }
+    }
+  }
+
+  lazy val simClustersInterestedInFromProducerEmbeddingsStore: ReadableStore[
+    (UserId, ModelVersion),
+    ClustersUserIsInterestedIn
+  ] = {
+    new ReadableStore[(UserId, ModelVersion), ClustersUserIsInterestedIn] {
+      override def get(k: (UserId, ModelVersion)): Future[Option[ClustersUserIsInterestedIn]] = {
+        k match {
+          case (userId, ModelVersion.Model20m145kUpdated) =>
+            InterestedInFromPE20M145KUpdatedStore.get(userId)
+          case _ =>
+            Future.None
+        }
+      }
+    }
+  }
+
+  lazy val userInterestedInStore =
+    new twistly.interestedin.EmbeddingStore(
+      interestedInStore = simClustersInterestedInStore,
+      interestedInFromProducerEmbeddingStore = simClustersInterestedInFromProducerEmbeddingsStore,
+      statsReceiver = statsReceiver
+    )
+
+  // Production
+  lazy val favBasedUserInterestedIn20M145KUpdatedStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val underlyingStore =
+      UserInterestedInReadableStore
+        .defaultSimClustersEmbeddingStoreWithMtls(
+          mhMtlsParams,
+          EmbeddingType.FavBasedUserInterestedIn,
+          ModelVersion.Model20m145kUpdated)
+        .mapValues(_.toThrift)
+
+    val memcachedStore = ObservedMemcachedReadableStore
+      .fromCacheClient(
+        backingStore = underlyingStore,
+        cacheClient = cacheClient,
+        ttl = 12.hours
+      )(
+        valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+        statsReceiver = statsReceiver.scope("fav_based_user_interested_in_mem_cache"),
+        keyToString = { k => embeddingCacheKeyBuilder.apply(k) }
+      ).mapValues(SimClustersEmbedding(_))
+
+    ObservedCachedReadableStore.from[SimClustersEmbeddingId, SimClustersEmbedding](
+      memcachedStore,
+      ttl = 6.hours,
+      maxKeys = 262143,
+      cacheName = "fav_based_user_interested_in_cache",
+      windowSize = 10000L
+    )(statsReceiver.scope("fav_based_user_interested_in_store"))
+  }
+
+  // Production
+  lazy val LogFavBasedInterestedInFromAPE20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val underlyingStore =
+      UserInterestedInReadableStore
+        .defaultIIAPESimClustersEmbeddingStoreWithMtls(
+          mhMtlsParams,
+          EmbeddingType.LogFavBasedUserInterestedInFromAPE,
+          ModelVersion.Model20m145k2020)
+        .mapValues(_.toThrift)
+
+    val memcachedStore = ObservedMemcachedReadableStore
+      .fromCacheClient(
+        backingStore = underlyingStore,
+        cacheClient = cacheClient,
+        ttl = 12.hours
+      )(
+        valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+        statsReceiver = statsReceiver.scope("log_fav_based_user_interested_in_from_ape_mem_cache"),
+        keyToString = { k => embeddingCacheKeyBuilder.apply(k) }
+      ).mapValues(SimClustersEmbedding(_))
+
+    ObservedCachedReadableStore.from[SimClustersEmbeddingId, SimClustersEmbedding](
+      memcachedStore,
+      ttl = 6.hours,
+      maxKeys = 262143,
+      cacheName = "log_fav_based_user_interested_in_from_ape_cache",
+      windowSize = 10000L
+    )(statsReceiver.scope("log_fav_based_user_interested_in_from_ape_store"))
+  }
+
+  // Production
+  lazy val FollowBasedInterestedInFromAPE20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val underlyingStore =
+      UserInterestedInReadableStore
+        .defaultIIAPESimClustersEmbeddingStoreWithMtls(
+          mhMtlsParams,
+          EmbeddingType.FollowBasedUserInterestedInFromAPE,
+          ModelVersion.Model20m145k2020)
+        .mapValues(_.toThrift)
+
+    val memcachedStore = ObservedMemcachedReadableStore
+      .fromCacheClient(
+        backingStore = underlyingStore,
+        cacheClient = cacheClient,
+        ttl = 12.hours
+      )(
+        valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+        statsReceiver = statsReceiver.scope("follow_based_user_interested_in_from_ape_mem_cache"),
+        keyToString = { k => embeddingCacheKeyBuilder.apply(k) }
+      ).mapValues(SimClustersEmbedding(_))
+
+    ObservedCachedReadableStore.from[SimClustersEmbeddingId, SimClustersEmbedding](
+      memcachedStore,
+      ttl = 6.hours,
+      maxKeys = 262143,
+      cacheName = "follow_based_user_interested_in_from_ape_cache",
+      windowSize = 10000L
+    )(statsReceiver.scope("follow_based_user_interested_in_from_ape_store"))
+  }
+
+  // production
+  lazy val favBasedUserInterestedIn20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val underlyingStore: ReadableStore[SimClustersEmbeddingId, ThriftSimClustersEmbedding] =
+      UserInterestedInReadableStore
+        .defaultSimClustersEmbeddingStoreWithMtls(
+          mhMtlsParams,
+          EmbeddingType.FavBasedUserInterestedIn,
+          ModelVersion.Model20m145k2020).mapValues(_.toThrift)
+
+    ObservedMemcachedReadableStore
+      .fromCacheClient(
+        backingStore = underlyingStore,
+        cacheClient = cacheClient,
+        ttl = 12.hours
+      )(
+        valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+        statsReceiver = statsReceiver.scope("fav_based_user_interested_in_2020_mem_cache"),
+        keyToString = { k => embeddingCacheKeyBuilder.apply(k) }
+      ).mapValues(SimClustersEmbedding(_))
+  }
+
+  // Production
+  lazy val logFavBasedUserInterestedIn20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val underlyingStore =
+      UserInterestedInReadableStore
+        .defaultSimClustersEmbeddingStoreWithMtls(
+          mhMtlsParams,
+          EmbeddingType.LogFavBasedUserInterestedIn,
+          ModelVersion.Model20m145k2020)
+
+    val memcachedStore = ObservedMemcachedReadableStore
+      .fromCacheClient(
+        backingStore = underlyingStore.mapValues(_.toThrift),
+        cacheClient = cacheClient,
+        ttl = 12.hours
+      )(
+        valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+        statsReceiver = statsReceiver.scope("log_fav_based_user_interested_in_2020_store"),
+        keyToString = { k => embeddingCacheKeyBuilder.apply(k) }
+      ).mapValues(SimClustersEmbedding(_))
+
+    ObservedCachedReadableStore.from[SimClustersEmbeddingId, SimClustersEmbedding](
+      memcachedStore,
+      ttl = 6.hours,
+      maxKeys = 262143,
+      cacheName = "log_fav_based_user_interested_in_2020_cache",
+      windowSize = 10000L
+    )(statsReceiver.scope("log_fav_based_user_interested_in_2020_store"))
+  }
+
+  // Production
+  lazy val favBasedUserInterestedInFromPE20M145KUpdatedStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val underlyingStore =
+      UserInterestedInReadableStore
+        .defaultIIPESimClustersEmbeddingStoreWithMtls(
+          mhMtlsParams,
+          EmbeddingType.FavBasedUserInterestedInFromPE,
+          ModelVersion.Model20m145kUpdated)
+        .mapValues(_.toThrift)
+
+    val memcachedStore = ObservedMemcachedReadableStore
+      .fromCacheClient(
+        backingStore = underlyingStore,
+        cacheClient = cacheClient,
+        ttl = 12.hours
+      )(
+        valueInjection = LZ4Injection.compose(BinaryScalaCodec(ThriftSimClustersEmbedding)),
+        statsReceiver = statsReceiver.scope("fav_based_user_interested_in_from_pe_mem_cache"),
+        keyToString = { k => embeddingCacheKeyBuilder.apply(k) }
+      ).mapValues(SimClustersEmbedding(_))
+
+    ObservedCachedReadableStore.from[SimClustersEmbeddingId, SimClustersEmbedding](
+      memcachedStore,
+      ttl = 6.hours,
+      maxKeys = 262143,
+      cacheName = "fav_based_user_interested_in_from_pe_cache",
+      windowSize = 10000L
+    )(statsReceiver.scope("fav_based_user_interested_in_from_pe_cache"))
+  }
+
+  private val underlyingStores: Map[
+    (EmbeddingType, ModelVersion),
+    ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding]
+  ] = Map(
+    // Tweet Embeddings
+    (LogFavBasedTweet, Model20m145kUpdated) -> logFavBased20M145KUpdatedTweetEmbeddingStore,
+    (LogFavBasedTweet, Model20m145k2020) -> logFavBased20M145K2020TweetEmbeddingStore,
+    (
+      LogFavLongestL2EmbeddingTweet,
+      Model20m145k2020) -> logFavBasedLongestL2Tweet20M145K2020EmbeddingStore,
+    // Entity Embeddings
+    (FavTfgTopic, Model20m145k2020) -> favBasedTfgTopicEmbedding2020Store,
+    (
+      LogFavBasedKgoApeTopic,
+      Model20m145k2020) -> logFavBasedApeEntity20M145K2020EmbeddingCachedStore,
+    // KnownFor Embeddings
+    (FavBasedProducer, Model20m145k2020) -> favBasedProducer20M145K2020EmbeddingStore,
+    (
+      RelaxedAggregatableLogFavBasedProducer,
+      Model20m145k2020) -> relaxedLogFavBasedApe20M145K2020EmbeddingCachedStore,
+    // InterestedIn Embeddings
+    (
+      LogFavBasedUserInterestedInFromAPE,
+      Model20m145k2020) -> LogFavBasedInterestedInFromAPE20M145K2020Store,
+    (
+      FollowBasedUserInterestedInFromAPE,
+      Model20m145k2020) -> FollowBasedInterestedInFromAPE20M145K2020Store,
+    (FavBasedUserInterestedIn, Model20m145kUpdated) -> favBasedUserInterestedIn20M145KUpdatedStore,
+    (FavBasedUserInterestedIn, Model20m145k2020) -> favBasedUserInterestedIn20M145K2020Store,
+    (LogFavBasedUserInterestedIn, Model20m145k2020) -> logFavBasedUserInterestedIn20M145K2020Store,
+    (
+      FavBasedUserInterestedInFromPE,
+      Model20m145kUpdated) -> favBasedUserInterestedInFromPE20M145KUpdatedStore,
+    (FilteredUserInterestedIn, Model20m145kUpdated) -> userInterestedInStore,
+    (FilteredUserInterestedIn, Model20m145k2020) -> userInterestedInStore,
+    (FilteredUserInterestedInFromPE, Model20m145kUpdated) -> userInterestedInStore,
+    (UnfilteredUserInterestedIn, Model20m145kUpdated) -> userInterestedInStore,
+    (UnfilteredUserInterestedIn, Model20m145k2020) -> userInterestedInStore,
+  )
+
+  val simClustersEmbeddingStore: ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+    val underlying: ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] =
+      SimClustersEmbeddingStore.buildWithDecider(
+        underlyingStores = underlyingStores,
+        decider = rmsDecider.decider,
+        statsReceiver = statsReceiver.scope("simClusters_embeddings_store_deciderable")
+      )
+
+    val underlyingWithTimeout: ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] =
+      new ReadableStoreWithTimeout(
+        rs = underlying,
+        decider = rmsDecider.decider,
+        enableTimeoutDeciderKey = DeciderConstants.enableSimClustersEmbeddingStoreTimeouts,
+        timeoutValueKey = DeciderConstants.simClustersEmbeddingStoreTimeoutValueMillis,
+        timer = timer,
+        statsReceiver = statsReceiver.scope("simClusters_embedding_store_timeouts")
+      )
+
+    ObservedReadableStore(
+      store = underlyingWithTimeout
+    )(statsReceiver.scope("simClusters_embeddings_store"))
+  }
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/BUILD
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/BUILD
@ -0,0 +1,18 @@
+scala_library(
+    compiler_option_sets = ["fatal_warnings"],
+    platform = "java8",
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "finagle-internal/mtls/src/main/scala/com/twitter/finagle/mtls/authentication",
+        "finagle/finagle-stats",
+        "finatra/inject/inject-core/src/main/scala",
+        "frigate/frigate-common/src/main/scala/com/twitter/frigate/common/util",
+        "interests-service/thrift/src/main/thrift:thrift-scala",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/common",
+        "servo/util",
+        "src/scala/com/twitter/storehaus_internal/manhattan",
+        "src/scala/com/twitter/storehaus_internal/memcache",
+        "src/scala/com/twitter/storehaus_internal/util",
+        "strato/src/main/scala/com/twitter/strato/client",
+    ],
+)
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/CacheModule.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/CacheModule.scala
@ -0,0 +1,34 @@
+package com.twitter.representation_manager.modules
+
+import com.google.inject.Provides
+import com.twitter.finagle.memcached.Client
+import javax.inject.Singleton
+import com.twitter.conversions.DurationOps._
+import com.twitter.inject.TwitterModule
+import com.twitter.finagle.mtls.authentication.ServiceIdentifier
+import com.twitter.finagle.stats.StatsReceiver
+import com.twitter.storehaus_internal.memcache.MemcacheStore
+import com.twitter.storehaus_internal.util.ClientName
+import com.twitter.storehaus_internal.util.ZkEndPoint
+
+object CacheModule extends TwitterModule {
+
+  private val cacheDest = flag[String]("cache_module.dest", "Path to memcache service")
+  private val timeout = flag[Int]("memcache.timeout", "Memcache client timeout")
+  private val retries = flag[Int]("memcache.retries", "Memcache timeout retries")
+
+  @Singleton
+  @Provides
+  def providesCache(
+    serviceIdentifier: ServiceIdentifier,
+    stats: StatsReceiver
+  ): Client =
+    MemcacheStore.memcachedClient(
+      name = ClientName("memcache_representation_manager"),
+      dest = ZkEndPoint(cacheDest()),
+      timeout = timeout().milliseconds,
+      retries = retries(),
+      statsReceiver = stats.scope("cache_client"),
+      serviceIdentifier = serviceIdentifier
+    )
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/InterestsThriftClientModule.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/InterestsThriftClientModule.scala
@ -0,0 +1,40 @@
+package com.twitter.representation_manager.modules
+
+import com.google.inject.Provides
+import com.twitter.conversions.DurationOps._
+import com.twitter.finagle.ThriftMux
+import com.twitter.finagle.mtls.authentication.ServiceIdentifier
+import com.twitter.finagle.mtls.client.MtlsStackClient.MtlsThriftMuxClientSyntax
+import com.twitter.finagle.mux.ClientDiscardedRequestException
+import com.twitter.finagle.service.ReqRep
+import com.twitter.finagle.service.ResponseClass
+import com.twitter.finagle.stats.StatsReceiver
+import com.twitter.finagle.thrift.ClientId
+import com.twitter.inject.TwitterModule
+import com.twitter.interests.thriftscala.InterestsThriftService
+import com.twitter.util.Throw
+import javax.inject.Singleton
+
+object InterestsThriftClientModule extends TwitterModule {
+
+  @Singleton
+  @Provides
+  def providesInterestsThriftClient(
+    clientId: ClientId,
+    serviceIdentifier: ServiceIdentifier,
+    statsReceiver: StatsReceiver
+  ): InterestsThriftService.MethodPerEndpoint = {
+    ThriftMux.client
+      .withClientId(clientId)
+      .withMutualTls(serviceIdentifier)
+      .withRequestTimeout(450.milliseconds)
+      .withStatsReceiver(statsReceiver.scope("InterestsThriftClient"))
+      .withResponseClassifier {
+        case ReqRep(_, Throw(_: ClientDiscardedRequestException)) => ResponseClass.Ignorable
+      }
+      .build[InterestsThriftService.MethodPerEndpoint](
+        dest = "/s/interests-thrift-service/interests-thrift-service",
+        label = "interests_thrift_service"
+      )
+  }
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/LegacyRMSConfigModule.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/LegacyRMSConfigModule.scala
@ -0,0 +1,18 @@
+package com.twitter.representation_manager.modules
+
+import com.google.inject.Provides
+import com.twitter.inject.TwitterModule
+import javax.inject.Named
+import javax.inject.Singleton
+
+object LegacyRMSConfigModule extends TwitterModule {
+  @Singleton
+  @Provides
+  @Named("cacheHashKeyPrefix")
+  def providesCacheHashKeyPrefix: String = "RMS"
+
+  @Singleton
+  @Provides
+  @Named("useContentRecommenderConfiguration")
+  def providesUseContentRecommenderConfiguration: Boolean = false
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/StoreModule.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/StoreModule.scala
@ -0,0 +1,24 @@
+package com.twitter.representation_manager.modules
+
+import com.google.inject.Provides
+import javax.inject.Singleton
+import com.twitter.inject.TwitterModule
+import com.twitter.decider.Decider
+import com.twitter.finagle.mtls.authentication.ServiceIdentifier
+import com.twitter.representation_manager.common.RepresentationManagerDecider
+import com.twitter.storage.client.manhattan.kv.ManhattanKVClientMtlsParams
+
+object StoreModule extends TwitterModule {
+  @Singleton
+  @Provides
+  def providesMhMtlsParams(
+    serviceIdentifier: ServiceIdentifier
+  ): ManhattanKVClientMtlsParams = ManhattanKVClientMtlsParams(serviceIdentifier)
+
+  @Singleton
+  @Provides
+  def providesRmsDecider(
+    decider: Decider
+  ): RepresentationManagerDecider = RepresentationManagerDecider(decider)
+
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/TimerModule.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/TimerModule.scala
@ -0,0 +1,13 @@
+package com.twitter.representation_manager.modules
+
+import com.google.inject.Provides
+import com.twitter.finagle.util.DefaultTimer
+import com.twitter.inject.TwitterModule
+import com.twitter.util.Timer
+import javax.inject.Singleton
+
+object TimerModule extends TwitterModule {
+  @Singleton
+  @Provides
+  def providesTimer: Timer = DefaultTimer
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/UttClientModule.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/modules/UttClientModule.scala
@ -0,0 +1,39 @@
+package com.twitter.representation_manager.modules
+
+import com.google.inject.Provides
+import com.twitter.escherbird.util.uttclient.CacheConfigV2
+import com.twitter.escherbird.util.uttclient.CachedUttClientV2
+import com.twitter.escherbird.util.uttclient.UttClientCacheConfigsV2
+import com.twitter.escherbird.utt.strato.thriftscala.Environment
+import com.twitter.finagle.stats.StatsReceiver
+import com.twitter.inject.TwitterModule
+import com.twitter.strato.client.{Client => StratoClient}
+import javax.inject.Singleton
+
+object UttClientModule extends TwitterModule {
+
+  @Singleton
+  @Provides
+  def providesUttClient(
+    stratoClient: StratoClient,
+    statsReceiver: StatsReceiver
+  ): CachedUttClientV2 = {
+    // Save 2 ^ 18 UTTs. Promising 100% cache rate
+    val defaultCacheConfigV2: CacheConfigV2 = CacheConfigV2(262143)
+
+    val uttClientCacheConfigsV2: UttClientCacheConfigsV2 = UttClientCacheConfigsV2(
+      getTaxonomyConfig = defaultCacheConfigV2,
+      getUttTaxonomyConfig = defaultCacheConfigV2,
+      getLeafIds = defaultCacheConfigV2,
+      getLeafUttEntities = defaultCacheConfigV2
+    )
+
+    // CachedUttClient to use StratoClient
+    new CachedUttClientV2(
+      stratoClient = stratoClient,
+      env = Environment.Prod,
+      cacheConfigs = uttClientCacheConfigsV2,
+      statsReceiver = statsReceiver.scope("cached_utt_client")
+    )
+  }
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/store/BUILD
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/store/BUILD
@ -0,0 +1,16 @@
+scala_library(
+    compiler_option_sets = ["fatal_warnings"],
+    platform = "java8",
+    tags = ["bazel-compatible"],
+    dependencies = [
+        "content-recommender/server/src/main/scala/com/twitter/contentrecommender:representation-manager-deps",
+        "frigate/frigate-common/src/main/scala/com/twitter/frigate/common/util",
+        "hermit/hermit-core/src/main/scala/com/twitter/hermit/store/common",
+        "representation-manager/server/src/main/scala/com/twitter/representation_manager/common",
+        "src/scala/com/twitter/simclusters_v2/stores",
+        "src/scala/com/twitter/simclusters_v2/summingbird/stores",
+        "src/thrift/com/twitter/simclusters_v2:simclusters_v2-thrift-scala",
+        "storage/clients/manhattan/client/src/main/scala",
+        "tweetypie/src/scala/com/twitter/tweetypie/util",
+    ],
+)
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/store/DeciderConstants.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/store/DeciderConstants.scala
@ -0,0 +1,39 @@
+package com.twitter.representation_manager.store
+
+import com.twitter.servo.decider.DeciderKeyEnum
+
+object DeciderConstants {
+  // Deciders inherited from CR and RSX and only used in LegacyRMS
+  // Their value are manipulated by CR and RSX's yml file and their decider dashboard
+  // We will remove them after migration completed
+  val enableLogFavBasedApeEntity20M145KUpdatedEmbeddingCachedStore =
+    "enableLogFavBasedApeEntity20M145KUpdatedEmbeddingCachedStore"
+
+  val enableLogFavBasedApeEntity20M145K2020EmbeddingCachedStore =
+    "enableLogFavBasedApeEntity20M145K2020EmbeddingCachedStore"
+
+  val enablelogFavBased20M145K2020TweetEmbeddingStoreTimeouts =
+    "enable_log_fav_based_tweet_embedding_20m145k2020_timeouts"
+  val logFavBased20M145K2020TweetEmbeddingStoreTimeoutValueMillis =
+    "log_fav_based_tweet_embedding_20m145k2020_timeout_value_millis"
+
+  val enablelogFavBased20M145KUpdatedTweetEmbeddingStoreTimeouts =
+    "enable_log_fav_based_tweet_embedding_20m145kUpdated_timeouts"
+  val logFavBased20M145KUpdatedTweetEmbeddingStoreTimeoutValueMillis =
+    "log_fav_based_tweet_embedding_20m145kUpdated_timeout_value_millis"
+
+  val enableSimClustersEmbeddingStoreTimeouts = "enable_sim_clusters_embedding_store_timeouts"
+  val simClustersEmbeddingStoreTimeoutValueMillis =
+    "sim_clusters_embedding_store_timeout_value_millis"
+}
+
+// Necessary for using servo Gates
+object DeciderKey extends DeciderKeyEnum {
+  val enableLogFavBasedApeEntity20M145KUpdatedEmbeddingCachedStore: Value = Value(
+    DeciderConstants.enableLogFavBasedApeEntity20M145KUpdatedEmbeddingCachedStore
+  )
+
+  val enableLogFavBasedApeEntity20M145K2020EmbeddingCachedStore: Value = Value(
+    DeciderConstants.enableLogFavBasedApeEntity20M145K2020EmbeddingCachedStore
+  )
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/store/TopicSimClustersEmbeddingStore.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/store/TopicSimClustersEmbeddingStore.scala
@ -0,0 +1,198 @@
+package com.twitter.representation_manager.store
+
+import com.twitter.contentrecommender.store.ApeEntityEmbeddingStore
+import com.twitter.contentrecommender.store.InterestsOptOutStore
+import com.twitter.contentrecommender.store.SemanticCoreTopicSeedStore
+import com.twitter.conversions.DurationOps._
+import com.twitter.escherbird.util.uttclient.CachedUttClientV2
+import com.twitter.finagle.memcached.Client
+import com.twitter.finagle.stats.StatsReceiver
+import com.twitter.frigate.common.store.strato.StratoFetchableStore
+import com.twitter.frigate.common.util.SeqLongInjection
+import com.twitter.hermit.store.common.ObservedCachedReadableStore
+import com.twitter.hermit.store.common.ObservedMemcachedReadableStore
+import com.twitter.hermit.store.common.ObservedReadableStore
+import com.twitter.interests.thriftscala.InterestsThriftService
+import com.twitter.representation_manager.common.MemCacheConfig
+import com.twitter.representation_manager.common.RepresentationManagerDecider
+import com.twitter.simclusters_v2.common.SimClustersEmbedding
+import com.twitter.simclusters_v2.stores.SimClustersEmbeddingStore
+import com.twitter.simclusters_v2.thriftscala.EmbeddingType
+import com.twitter.simclusters_v2.thriftscala.EmbeddingType._
+import com.twitter.simclusters_v2.thriftscala.InternalId
+import com.twitter.simclusters_v2.thriftscala.ModelVersion
+import com.twitter.simclusters_v2.thriftscala.ModelVersion._
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbeddingId
+import com.twitter.simclusters_v2.thriftscala.TopicId
+import com.twitter.simclusters_v2.thriftscala.LocaleEntityId
+import com.twitter.simclusters_v2.thriftscala.{SimClustersEmbedding => ThriftSimClustersEmbedding}
+import com.twitter.storage.client.manhattan.kv.ManhattanKVClientMtlsParams
+import com.twitter.storehaus.ReadableStore
+import com.twitter.strato.client.{Client => StratoClient}
+import com.twitter.tweetypie.util.UserId
+import javax.inject.Inject
+
+class TopicSimClustersEmbeddingStore @Inject() (
+  stratoClient: StratoClient,
+  cacheClient: Client,
+  globalStats: StatsReceiver,
+  mhMtlsParams: ManhattanKVClientMtlsParams,
+  rmsDecider: RepresentationManagerDecider,
+  interestService: InterestsThriftService.MethodPerEndpoint,
+  uttClient: CachedUttClientV2) {
+
+  private val stats = globalStats.scope(this.getClass.getSimpleName)
+  private val interestsOptOutStore = InterestsOptOutStore(interestService)
+
+  /**
+   * Note this is NOT an embedding store. It is a list of author account ids we use to represent
+   * topics
+   */
+  private val semanticCoreTopicSeedStore: ReadableStore[
+    SemanticCoreTopicSeedStore.Key,
+    Seq[UserId]
+  ] = {
+    /*
+      Up to 1000 Long seeds per topic/language = 62.5kb per topic/language (worst case)
+      Assume ~10k active topic/languages ~= 650MB (worst case)
+     */
+    val underlying = new SemanticCoreTopicSeedStore(uttClient, interestsOptOutStore)(
+      stats.scope("semantic_core_topic_seed_store"))
+
+    val memcacheStore = ObservedMemcachedReadableStore.fromCacheClient(
+      backingStore = underlying,
+      cacheClient = cacheClient,
+      ttl = 12.hours)(
+      valueInjection = SeqLongInjection,
+      statsReceiver = stats.scope("topic_producer_seed_store_mem_cache"),
+      keyToString = { k => s"tpss:${k.entityId}_${k.languageCode}" }
+    )
+
+    ObservedCachedReadableStore.from[SemanticCoreTopicSeedStore.Key, Seq[UserId]](
+      store = memcacheStore,
+      ttl = 6.hours,
+      maxKeys = 20e3.toInt,
+      cacheName = "topic_producer_seed_store_cache",
+      windowSize = 5000
+    )(stats.scope("topic_producer_seed_store_cache"))
+  }
+
+  private val favBasedTfgTopicEmbedding20m145k2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore =
+      StratoFetchableStore
+        .withUnitView[SimClustersEmbeddingId, ThriftSimClustersEmbedding](
+          stratoClient,
+          "recommendations/simclusters_v2/embeddings/favBasedTFGTopic20M145K2020").mapValues(
+          embedding => SimClustersEmbedding(embedding, truncate = 50).toThrift)
+        .composeKeyMapping[LocaleEntityId] { localeEntityId =>
+          SimClustersEmbeddingId(
+            FavTfgTopic,
+            Model20m145k2020,
+            InternalId.LocaleEntityId(localeEntityId))
+        }
+
+    buildLocaleEntityIdMemCacheStore(rawStore, FavTfgTopic, Model20m145k2020)
+  }
+
+  private val logFavBasedApeEntity20M145K2020EmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val apeStore = StratoFetchableStore
+      .withUnitView[SimClustersEmbeddingId, ThriftSimClustersEmbedding](
+        stratoClient,
+        "recommendations/simclusters_v2/embeddings/logFavBasedAPE20M145K2020")
+      .mapValues(embedding => SimClustersEmbedding(embedding, truncate = 50))
+      .composeKeyMapping[UserId]({ id =>
+        SimClustersEmbeddingId(
+          AggregatableLogFavBasedProducer,
+          Model20m145k2020,
+          InternalId.UserId(id))
+      })
+    val rawStore = new ApeEntityEmbeddingStore(
+      semanticCoreSeedStore = semanticCoreTopicSeedStore,
+      aggregatableProducerEmbeddingStore = apeStore,
+      statsReceiver = stats.scope("log_fav_based_ape_entity_2020_embedding_store"))
+      .mapValues(embedding => SimClustersEmbedding(embedding.toThrift, truncate = 50).toThrift)
+      .composeKeyMapping[TopicId] { topicId =>
+        SimClustersEmbeddingId(
+          LogFavBasedKgoApeTopic,
+          Model20m145k2020,
+          InternalId.TopicId(topicId))
+      }
+
+    buildTopicIdMemCacheStore(rawStore, LogFavBasedKgoApeTopic, Model20m145k2020)
+  }
+
+  private def buildTopicIdMemCacheStore(
+    rawStore: ReadableStore[TopicId, ThriftSimClustersEmbedding],
+    embeddingType: EmbeddingType,
+    modelVersion: ModelVersion
+  ): ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+    val observedStore: ObservedReadableStore[TopicId, ThriftSimClustersEmbedding] =
+      ObservedReadableStore(
+        store = rawStore
+      )(stats.scope(embeddingType.name).scope(modelVersion.name))
+
+    val storeWithKeyMapping = observedStore.composeKeyMapping[SimClustersEmbeddingId] {
+      case SimClustersEmbeddingId(_, _, InternalId.TopicId(topicId)) =>
+        topicId
+    }
+
+    MemCacheConfig.buildMemCacheStoreForSimClustersEmbedding(
+      storeWithKeyMapping,
+      cacheClient,
+      embeddingType,
+      modelVersion,
+      stats
+    )
+  }
+
+  private def buildLocaleEntityIdMemCacheStore(
+    rawStore: ReadableStore[LocaleEntityId, ThriftSimClustersEmbedding],
+    embeddingType: EmbeddingType,
+    modelVersion: ModelVersion
+  ): ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+    val observedStore: ObservedReadableStore[LocaleEntityId, ThriftSimClustersEmbedding] =
+      ObservedReadableStore(
+        store = rawStore
+      )(stats.scope(embeddingType.name).scope(modelVersion.name))
+
+    val storeWithKeyMapping = observedStore.composeKeyMapping[SimClustersEmbeddingId] {
+      case SimClustersEmbeddingId(_, _, InternalId.LocaleEntityId(localeEntityId)) =>
+        localeEntityId
+    }
+
+    MemCacheConfig.buildMemCacheStoreForSimClustersEmbedding(
+      storeWithKeyMapping,
+      cacheClient,
+      embeddingType,
+      modelVersion,
+      stats
+    )
+  }
+
+  private val underlyingStores: Map[
+    (EmbeddingType, ModelVersion),
+    ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding]
+  ] = Map(
+    // Topic Embeddings
+    (FavTfgTopic, Model20m145k2020) -> favBasedTfgTopicEmbedding20m145k2020Store,
+    (LogFavBasedKgoApeTopic, Model20m145k2020) -> logFavBasedApeEntity20M145K2020EmbeddingStore,
+  )
+
+  val topicSimClustersEmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    SimClustersEmbeddingStore.buildWithDecider(
+      underlyingStores = underlyingStores,
+      decider = rmsDecider.decider,
+      statsReceiver = stats
+    )
+  }
+
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/store/TweetSimClustersEmbeddingStore.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/store/TweetSimClustersEmbeddingStore.scala
@ -0,0 +1,141 @@
+package com.twitter.representation_manager.store
+
+import com.twitter.finagle.memcached.Client
+import com.twitter.finagle.stats.StatsReceiver
+import com.twitter.hermit.store.common.ObservedReadableStore
+import com.twitter.representation_manager.common.MemCacheConfig
+import com.twitter.representation_manager.common.RepresentationManagerDecider
+import com.twitter.simclusters_v2.common.SimClustersEmbedding
+import com.twitter.simclusters_v2.common.TweetId
+import com.twitter.simclusters_v2.stores.SimClustersEmbeddingStore
+import com.twitter.simclusters_v2.summingbird.stores.PersistentTweetEmbeddingStore
+import com.twitter.simclusters_v2.thriftscala.EmbeddingType
+import com.twitter.simclusters_v2.thriftscala.EmbeddingType._
+import com.twitter.simclusters_v2.thriftscala.InternalId
+import com.twitter.simclusters_v2.thriftscala.ModelVersion
+import com.twitter.simclusters_v2.thriftscala.ModelVersion._
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbeddingId
+import com.twitter.simclusters_v2.thriftscala.{SimClustersEmbedding => ThriftSimClustersEmbedding}
+import com.twitter.storage.client.manhattan.kv.ManhattanKVClientMtlsParams
+import com.twitter.storehaus.ReadableStore
+import javax.inject.Inject
+
+class TweetSimClustersEmbeddingStore @Inject() (
+  cacheClient: Client,
+  globalStats: StatsReceiver,
+  mhMtlsParams: ManhattanKVClientMtlsParams,
+  rmsDecider: RepresentationManagerDecider) {
+
+  private val stats = globalStats.scope(this.getClass.getSimpleName)
+
+  val logFavBasedLongestL2Tweet20M145KUpdatedEmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore =
+      PersistentTweetEmbeddingStore
+        .longestL2NormTweetEmbeddingStoreManhattan(
+          mhMtlsParams,
+          PersistentTweetEmbeddingStore.LogFavBased20m145kUpdatedDataset,
+          stats
+        ).mapValues(_.toThrift)
+
+    buildMemCacheStore(rawStore, LogFavLongestL2EmbeddingTweet, Model20m145kUpdated)
+  }
+
+  val logFavBasedLongestL2Tweet20M145K2020EmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore =
+      PersistentTweetEmbeddingStore
+        .longestL2NormTweetEmbeddingStoreManhattan(
+          mhMtlsParams,
+          PersistentTweetEmbeddingStore.LogFavBased20m145k2020Dataset,
+          stats
+        ).mapValues(_.toThrift)
+
+    buildMemCacheStore(rawStore, LogFavLongestL2EmbeddingTweet, Model20m145k2020)
+  }
+
+  val logFavBased20M145KUpdatedTweetEmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore =
+      PersistentTweetEmbeddingStore
+        .mostRecentTweetEmbeddingStoreManhattan(
+          mhMtlsParams,
+          PersistentTweetEmbeddingStore.LogFavBased20m145kUpdatedDataset,
+          stats
+        ).mapValues(_.toThrift)
+
+    buildMemCacheStore(rawStore, LogFavBasedTweet, Model20m145kUpdated)
+  }
+
+  val logFavBased20M145K2020TweetEmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore =
+      PersistentTweetEmbeddingStore
+        .mostRecentTweetEmbeddingStoreManhattan(
+          mhMtlsParams,
+          PersistentTweetEmbeddingStore.LogFavBased20m145k2020Dataset,
+          stats
+        ).mapValues(_.toThrift)
+
+    buildMemCacheStore(rawStore, LogFavBasedTweet, Model20m145k2020)
+  }
+
+  private def buildMemCacheStore(
+    rawStore: ReadableStore[TweetId, ThriftSimClustersEmbedding],
+    embeddingType: EmbeddingType,
+    modelVersion: ModelVersion
+  ): ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+    val observedStore: ObservedReadableStore[TweetId, ThriftSimClustersEmbedding] =
+      ObservedReadableStore(
+        store = rawStore
+      )(stats.scope(embeddingType.name).scope(modelVersion.name))
+
+    val storeWithKeyMapping = observedStore.composeKeyMapping[SimClustersEmbeddingId] {
+      case SimClustersEmbeddingId(_, _, InternalId.TweetId(tweetId)) =>
+        tweetId
+    }
+
+    MemCacheConfig.buildMemCacheStoreForSimClustersEmbedding(
+      storeWithKeyMapping,
+      cacheClient,
+      embeddingType,
+      modelVersion,
+      stats
+    )
+  }
+
+  private val underlyingStores: Map[
+    (EmbeddingType, ModelVersion),
+    ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding]
+  ] = Map(
+    // Tweet Embeddings
+    (LogFavBasedTweet, Model20m145kUpdated) -> logFavBased20M145KUpdatedTweetEmbeddingStore,
+    (LogFavBasedTweet, Model20m145k2020) -> logFavBased20M145K2020TweetEmbeddingStore,
+    (
+      LogFavLongestL2EmbeddingTweet,
+      Model20m145kUpdated) -> logFavBasedLongestL2Tweet20M145KUpdatedEmbeddingStore,
+    (
+      LogFavLongestL2EmbeddingTweet,
+      Model20m145k2020) -> logFavBasedLongestL2Tweet20M145K2020EmbeddingStore,
+  )
+
+  val tweetSimClustersEmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    SimClustersEmbeddingStore.buildWithDecider(
+      underlyingStores = underlyingStores,
+      decider = rmsDecider.decider,
+      statsReceiver = stats
+    )
+  }
+
+}
--- a/representation-manager/server/src/main/scala/com/twitter/representation_manager/store/UserSimClustersEmbeddingStore.scala
+++ b/representation-manager/server/src/main/scala/com/twitter/representation_manager/store/UserSimClustersEmbeddingStore.scala
@ -0,0 +1,602 @@
+package com.twitter.representation_manager.store
+
+import com.twitter.contentrecommender.twistly
+import com.twitter.finagle.memcached.Client
+import com.twitter.finagle.stats.StatsReceiver
+import com.twitter.frigate.common.store.strato.StratoFetchableStore
+import com.twitter.hermit.store.common.ObservedReadableStore
+import com.twitter.representation_manager.common.MemCacheConfig
+import com.twitter.representation_manager.common.RepresentationManagerDecider
+import com.twitter.simclusters_v2.common.ModelVersions
+import com.twitter.simclusters_v2.common.SimClustersEmbedding
+import com.twitter.simclusters_v2.stores.SimClustersEmbeddingStore
+import com.twitter.simclusters_v2.summingbird.stores.ProducerClusterEmbeddingReadableStores
+import com.twitter.simclusters_v2.summingbird.stores.UserInterestedInReadableStore
+import com.twitter.simclusters_v2.summingbird.stores.UserInterestedInReadableStore.getStore
+import com.twitter.simclusters_v2.summingbird.stores.UserInterestedInReadableStore.modelVersionToDatasetMap
+import com.twitter.simclusters_v2.summingbird.stores.UserInterestedInReadableStore.knownModelVersions
+import com.twitter.simclusters_v2.summingbird.stores.UserInterestedInReadableStore.toSimClustersEmbedding
+import com.twitter.simclusters_v2.thriftscala.ClustersUserIsInterestedIn
+import com.twitter.simclusters_v2.thriftscala.EmbeddingType
+import com.twitter.simclusters_v2.thriftscala.EmbeddingType._
+import com.twitter.simclusters_v2.thriftscala.InternalId
+import com.twitter.simclusters_v2.thriftscala.ModelVersion
+import com.twitter.simclusters_v2.thriftscala.ModelVersion._
+import com.twitter.simclusters_v2.thriftscala.SimClustersEmbeddingId
+import com.twitter.simclusters_v2.thriftscala.{SimClustersEmbedding => ThriftSimClustersEmbedding}
+import com.twitter.storage.client.manhattan.kv.ManhattanKVClientMtlsParams
+import com.twitter.storehaus.ReadableStore
+import com.twitter.storehaus_internal.manhattan.Apollo
+import com.twitter.storehaus_internal.manhattan.ManhattanCluster
+import com.twitter.strato.client.{Client => StratoClient}
+import com.twitter.strato.thrift.ScroogeConvImplicits._
+import com.twitter.tweetypie.util.UserId
+import com.twitter.util.Future
+import javax.inject.Inject
+
+class UserSimClustersEmbeddingStore @Inject() (
+  stratoClient: StratoClient,
+  cacheClient: Client,
+  globalStats: StatsReceiver,
+  mhMtlsParams: ManhattanKVClientMtlsParams,
+  rmsDecider: RepresentationManagerDecider) {
+
+  private val stats = globalStats.scope(this.getClass.getSimpleName)
+
+  private val favBasedProducer20M145KUpdatedEmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore = ProducerClusterEmbeddingReadableStores
+      .getProducerTopKSimClustersEmbeddingsStore(
+        mhMtlsParams
+      ).mapValues { topSimClustersWithScore =>
+        ThriftSimClustersEmbedding(topSimClustersWithScore.topClusters)
+      }.composeKeyMapping[SimClustersEmbeddingId] {
+        case SimClustersEmbeddingId(_, _, InternalId.UserId(userId)) =>
+          userId
+      }
+
+    buildMemCacheStore(rawStore, FavBasedProducer, Model20m145kUpdated)
+  }
+
+  private val favBasedProducer20M145K2020EmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore = ProducerClusterEmbeddingReadableStores
+      .getProducerTopKSimClusters2020EmbeddingsStore(
+        mhMtlsParams
+      ).mapValues { topSimClustersWithScore =>
+        ThriftSimClustersEmbedding(topSimClustersWithScore.topClusters)
+      }.composeKeyMapping[SimClustersEmbeddingId] {
+        case SimClustersEmbeddingId(_, _, InternalId.UserId(userId)) =>
+          userId
+      }
+
+    buildMemCacheStore(rawStore, FavBasedProducer, Model20m145k2020)
+  }
+
+  private val followBasedProducer20M145K2020EmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore = ProducerClusterEmbeddingReadableStores
+      .getProducerTopKSimClustersEmbeddingsByFollowStore(
+        mhMtlsParams
+      ).mapValues { topSimClustersWithScore =>
+        ThriftSimClustersEmbedding(topSimClustersWithScore.topClusters)
+      }.composeKeyMapping[SimClustersEmbeddingId] {
+        case SimClustersEmbeddingId(_, _, InternalId.UserId(userId)) =>
+          userId
+      }
+
+    buildMemCacheStore(rawStore, FollowBasedProducer, Model20m145k2020)
+  }
+
+  private val logFavBasedApe20M145K2020EmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore = StratoFetchableStore
+      .withUnitView[SimClustersEmbeddingId, ThriftSimClustersEmbedding](
+        stratoClient,
+        "recommendations/simclusters_v2/embeddings/logFavBasedAPE20M145K2020")
+      .mapValues(embedding => SimClustersEmbedding(embedding, truncate = 50).toThrift)
+
+    buildMemCacheStore(rawStore, AggregatableLogFavBasedProducer, Model20m145k2020)
+  }
+
+  private val rawRelaxedLogFavBasedApe20M145K2020EmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    ThriftSimClustersEmbedding
+  ] = {
+    StratoFetchableStore
+      .withUnitView[SimClustersEmbeddingId, ThriftSimClustersEmbedding](
+        stratoClient,
+        "recommendations/simclusters_v2/embeddings/logFavBasedAPERelaxedFavEngagementThreshold20M145K2020")
+      .mapValues(embedding => SimClustersEmbedding(embedding, truncate = 50).toThrift)
+  }
+
+  private val relaxedLogFavBasedApe20M145K2020EmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildMemCacheStore(
+      rawRelaxedLogFavBasedApe20M145K2020EmbeddingStore,
+      RelaxedAggregatableLogFavBasedProducer,
+      Model20m145k2020)
+  }
+
+  private val relaxedLogFavBasedApe20m145kUpdatedEmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore = rawRelaxedLogFavBasedApe20M145K2020EmbeddingStore
+      .composeKeyMapping[SimClustersEmbeddingId] {
+        case SimClustersEmbeddingId(
+              RelaxedAggregatableLogFavBasedProducer,
+              Model20m145kUpdated,
+              internalId) =>
+          SimClustersEmbeddingId(
+            RelaxedAggregatableLogFavBasedProducer,
+            Model20m145k2020,
+            internalId)
+      }
+
+    buildMemCacheStore(rawStore, RelaxedAggregatableLogFavBasedProducer, Model20m145kUpdated)
+  }
+
+  private val logFavBasedInterestedInFromAPE20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildUserInterestedInStore(
+      UserInterestedInReadableStore.defaultIIAPESimClustersEmbeddingStoreWithMtls,
+      LogFavBasedUserInterestedInFromAPE,
+      Model20m145k2020)
+  }
+
+  private val followBasedInterestedInFromAPE20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildUserInterestedInStore(
+      UserInterestedInReadableStore.defaultIIAPESimClustersEmbeddingStoreWithMtls,
+      FollowBasedUserInterestedInFromAPE,
+      Model20m145k2020)
+  }
+
+  private val favBasedUserInterestedIn20M145KUpdatedStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildUserInterestedInStore(
+      UserInterestedInReadableStore.defaultSimClustersEmbeddingStoreWithMtls,
+      FavBasedUserInterestedIn,
+      Model20m145kUpdated)
+  }
+
+  private val favBasedUserInterestedIn20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildUserInterestedInStore(
+      UserInterestedInReadableStore.defaultSimClustersEmbeddingStoreWithMtls,
+      FavBasedUserInterestedIn,
+      Model20m145k2020)
+  }
+
+  private val followBasedUserInterestedIn20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildUserInterestedInStore(
+      UserInterestedInReadableStore.defaultSimClustersEmbeddingStoreWithMtls,
+      FollowBasedUserInterestedIn,
+      Model20m145k2020)
+  }
+
+  private val logFavBasedUserInterestedIn20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildUserInterestedInStore(
+      UserInterestedInReadableStore.defaultSimClustersEmbeddingStoreWithMtls,
+      LogFavBasedUserInterestedIn,
+      Model20m145k2020)
+  }
+
+  private val favBasedUserInterestedInFromPE20M145KUpdatedStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildUserInterestedInStore(
+      UserInterestedInReadableStore.defaultIIPESimClustersEmbeddingStoreWithMtls,
+      FavBasedUserInterestedInFromPE,
+      Model20m145kUpdated)
+  }
+
+  private val twistlyUserInterestedInStore: ReadableStore[
+    SimClustersEmbeddingId,
+    ThriftSimClustersEmbedding
+  ] = {
+    val interestedIn20M145KUpdatedStore = {
+      UserInterestedInReadableStore.defaultStoreWithMtls(
+        mhMtlsParams,
+        modelVersion = ModelVersions.Model20M145KUpdated
+      )
+    }
+    val interestedIn20M145K2020Store = {
+      UserInterestedInReadableStore.defaultStoreWithMtls(
+        mhMtlsParams,
+        modelVersion = ModelVersions.Model20M145K2020
+      )
+    }
+    val interestedInFromPE20M145KUpdatedStore = {
+      UserInterestedInReadableStore.defaultIIPEStoreWithMtls(
+        mhMtlsParams,
+        modelVersion = ModelVersions.Model20M145KUpdated)
+    }
+    val simClustersInterestedInStore: ReadableStore[
+      (UserId, ModelVersion),
+      ClustersUserIsInterestedIn
+    ] = {
+      new ReadableStore[(UserId, ModelVersion), ClustersUserIsInterestedIn] {
+        override def get(k: (UserId, ModelVersion)): Future[Option[ClustersUserIsInterestedIn]] = {
+          k match {
+            case (userId, Model20m145kUpdated) =>
+              interestedIn20M145KUpdatedStore.get(userId)
+            case (userId, Model20m145k2020) =>
+              interestedIn20M145K2020Store.get(userId)
+            case _ =>
+              Future.None
+          }
+        }
+      }
+    }
+    val simClustersInterestedInFromProducerEmbeddingsStore: ReadableStore[
+      (UserId, ModelVersion),
+      ClustersUserIsInterestedIn
+    ] = {
+      new ReadableStore[(UserId, ModelVersion), ClustersUserIsInterestedIn] {
+        override def get(k: (UserId, ModelVersion)): Future[Option[ClustersUserIsInterestedIn]] = {
+          k match {
+            case (userId, ModelVersion.Model20m145kUpdated) =>
+              interestedInFromPE20M145KUpdatedStore.get(userId)
+            case _ =>
+              Future.None
+          }
+        }
+      }
+    }
+    new twistly.interestedin.EmbeddingStore(
+      interestedInStore = simClustersInterestedInStore,
+      interestedInFromProducerEmbeddingStore = simClustersInterestedInFromProducerEmbeddingsStore,
+      statsReceiver = stats
+    ).mapValues(_.toThrift)
+  }
+
+  private val userNextInterestedIn20m145k2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildUserInterestedInStore(
+      UserInterestedInReadableStore.defaultNextInterestedInStoreWithMtls,
+      UserNextInterestedIn,
+      Model20m145k2020)
+  }
+
+  private val filteredUserInterestedIn20m145kUpdatedStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildMemCacheStore(twistlyUserInterestedInStore, FilteredUserInterestedIn, Model20m145kUpdated)
+  }
+
+  private val filteredUserInterestedIn20m145k2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildMemCacheStore(twistlyUserInterestedInStore, FilteredUserInterestedIn, Model20m145k2020)
+  }
+
+  private val filteredUserInterestedInFromPE20m145kUpdatedStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildMemCacheStore(
+      twistlyUserInterestedInStore,
+      FilteredUserInterestedInFromPE,
+      Model20m145kUpdated)
+  }
+
+  private val unfilteredUserInterestedIn20m145kUpdatedStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildMemCacheStore(
+      twistlyUserInterestedInStore,
+      UnfilteredUserInterestedIn,
+      Model20m145kUpdated)
+  }
+
+  private val unfilteredUserInterestedIn20m145k2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    buildMemCacheStore(twistlyUserInterestedInStore, UnfilteredUserInterestedIn, Model20m145k2020)
+  }
+
+  // [Experimental] User InterestedIn, generated by aggregating IIAPE embedding from AddressBook
+
+  private val logFavBasedInterestedMaxpoolingAddressBookFromIIAPE20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val datasetName = "addressbook_sims_embedding_iiape_maxpooling"
+    val appId = "wtf_embedding_apollo"
+    buildUserInterestedInStoreGeneric(
+      simClustersEmbeddingStoreWithMtls,
+      LogFavBasedUserInterestedMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020,
+      datasetName = datasetName,
+      appId = appId,
+      manhattanCluster = Apollo
+    )
+  }
+
+  private val logFavBasedInterestedAverageAddressBookFromIIAPE20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val datasetName = "addressbook_sims_embedding_iiape_average"
+    val appId = "wtf_embedding_apollo"
+    buildUserInterestedInStoreGeneric(
+      simClustersEmbeddingStoreWithMtls,
+      LogFavBasedUserInterestedAverageAddressBookFromIIAPE,
+      Model20m145k2020,
+      datasetName = datasetName,
+      appId = appId,
+      manhattanCluster = Apollo
+    )
+  }
+
+  private val logFavBasedUserInterestedBooktypeMaxpoolingAddressBookFromIIAPE20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val datasetName = "addressbook_sims_embedding_iiape_booktype_maxpooling"
+    val appId = "wtf_embedding_apollo"
+    buildUserInterestedInStoreGeneric(
+      simClustersEmbeddingStoreWithMtls,
+      LogFavBasedUserInterestedBooktypeMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020,
+      datasetName = datasetName,
+      appId = appId,
+      manhattanCluster = Apollo
+    )
+  }
+
+  private val logFavBasedUserInterestedLargestDimMaxpoolingAddressBookFromIIAPE20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val datasetName = "addressbook_sims_embedding_iiape_largestdim_maxpooling"
+    val appId = "wtf_embedding_apollo"
+    buildUserInterestedInStoreGeneric(
+      simClustersEmbeddingStoreWithMtls,
+      LogFavBasedUserInterestedLargestDimMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020,
+      datasetName = datasetName,
+      appId = appId,
+      manhattanCluster = Apollo
+    )
+  }
+
+  private val logFavBasedUserInterestedLouvainMaxpoolingAddressBookFromIIAPE20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val datasetName = "addressbook_sims_embedding_iiape_louvain_maxpooling"
+    val appId = "wtf_embedding_apollo"
+    buildUserInterestedInStoreGeneric(
+      simClustersEmbeddingStoreWithMtls,
+      LogFavBasedUserInterestedLouvainMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020,
+      datasetName = datasetName,
+      appId = appId,
+      manhattanCluster = Apollo
+    )
+  }
+
+  private val logFavBasedUserInterestedConnectedMaxpoolingAddressBookFromIIAPE20M145K2020Store: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val datasetName = "addressbook_sims_embedding_iiape_connected_maxpooling"
+    val appId = "wtf_embedding_apollo"
+    buildUserInterestedInStoreGeneric(
+      simClustersEmbeddingStoreWithMtls,
+      LogFavBasedUserInterestedConnectedMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020,
+      datasetName = datasetName,
+      appId = appId,
+      manhattanCluster = Apollo
+    )
+  }
+
+  /**
+   * Helper func to build a readable store for some UserInterestedIn embeddings with
+   *    1. A storeFunc from UserInterestedInReadableStore
+   *    2. EmbeddingType
+   *    3. ModelVersion
+   *    4. MemCacheConfig
+   * */
+  private def buildUserInterestedInStore(
+    storeFunc: (ManhattanKVClientMtlsParams, EmbeddingType, ModelVersion) => ReadableStore[
+      SimClustersEmbeddingId,
+      SimClustersEmbedding
+    ],
+    embeddingType: EmbeddingType,
+    modelVersion: ModelVersion
+  ): ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore = storeFunc(mhMtlsParams, embeddingType, modelVersion)
+      .mapValues(_.toThrift)
+    val observedStore = ObservedReadableStore(
+      store = rawStore
+    )(stats.scope(embeddingType.name).scope(modelVersion.name))
+
+    MemCacheConfig.buildMemCacheStoreForSimClustersEmbedding(
+      observedStore,
+      cacheClient,
+      embeddingType,
+      modelVersion,
+      stats
+    )
+  }
+
+  private def buildUserInterestedInStoreGeneric(
+    storeFunc: (ManhattanKVClientMtlsParams, EmbeddingType, ModelVersion, String, String,
+      ManhattanCluster) => ReadableStore[
+      SimClustersEmbeddingId,
+      SimClustersEmbedding
+    ],
+    embeddingType: EmbeddingType,
+    modelVersion: ModelVersion,
+    datasetName: String,
+    appId: String,
+    manhattanCluster: ManhattanCluster
+  ): ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    val rawStore =
+      storeFunc(mhMtlsParams, embeddingType, modelVersion, datasetName, appId, manhattanCluster)
+        .mapValues(_.toThrift)
+    val observedStore = ObservedReadableStore(
+      store = rawStore
+    )(stats.scope(embeddingType.name).scope(modelVersion.name))
+
+    MemCacheConfig.buildMemCacheStoreForSimClustersEmbedding(
+      observedStore,
+      cacheClient,
+      embeddingType,
+      modelVersion,
+      stats
+    )
+  }
+
+  private def simClustersEmbeddingStoreWithMtls(
+    mhMtlsParams: ManhattanKVClientMtlsParams,
+    embeddingType: EmbeddingType,
+    modelVersion: ModelVersion,
+    datasetName: String,
+    appId: String,
+    manhattanCluster: ManhattanCluster
+  ): ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+
+    if (!modelVersionToDatasetMap.contains(ModelVersions.toKnownForModelVersion(modelVersion))) {
+      throw new IllegalArgumentException(
+        "Unknown model version: " + modelVersion + ". Known model versions: " + knownModelVersions)
+    }
+    getStore(appId, mhMtlsParams, datasetName, manhattanCluster)
+      .composeKeyMapping[SimClustersEmbeddingId] {
+        case SimClustersEmbeddingId(theEmbeddingType, theModelVersion, InternalId.UserId(userId))
+            if theEmbeddingType == embeddingType && theModelVersion == modelVersion =>
+          userId
+      }.mapValues(toSimClustersEmbedding(_, embeddingType))
+  }
+
+  private def buildMemCacheStore(
+    rawStore: ReadableStore[SimClustersEmbeddingId, ThriftSimClustersEmbedding],
+    embeddingType: EmbeddingType,
+    modelVersion: ModelVersion
+  ): ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding] = {
+    val observedStore = ObservedReadableStore(
+      store = rawStore
+    )(stats.scope(embeddingType.name).scope(modelVersion.name))
+
+    MemCacheConfig.buildMemCacheStoreForSimClustersEmbedding(
+      observedStore,
+      cacheClient,
+      embeddingType,
+      modelVersion,
+      stats
+    )
+  }
+
+  private val underlyingStores: Map[
+    (EmbeddingType, ModelVersion),
+    ReadableStore[SimClustersEmbeddingId, SimClustersEmbedding]
+  ] = Map(
+    // KnownFor Embeddings
+    (FavBasedProducer, Model20m145kUpdated) -> favBasedProducer20M145KUpdatedEmbeddingStore,
+    (FavBasedProducer, Model20m145k2020) -> favBasedProducer20M145K2020EmbeddingStore,
+    (FollowBasedProducer, Model20m145k2020) -> followBasedProducer20M145K2020EmbeddingStore,
+    (AggregatableLogFavBasedProducer, Model20m145k2020) -> logFavBasedApe20M145K2020EmbeddingStore,
+    (
+      RelaxedAggregatableLogFavBasedProducer,
+      Model20m145kUpdated) -> relaxedLogFavBasedApe20m145kUpdatedEmbeddingStore,
+    (
+      RelaxedAggregatableLogFavBasedProducer,
+      Model20m145k2020) -> relaxedLogFavBasedApe20M145K2020EmbeddingStore,
+    // InterestedIn Embeddings
+    (
+      LogFavBasedUserInterestedInFromAPE,
+      Model20m145k2020) -> logFavBasedInterestedInFromAPE20M145K2020Store,
+    (
+      FollowBasedUserInterestedInFromAPE,
+      Model20m145k2020) -> followBasedInterestedInFromAPE20M145K2020Store,
+    (FavBasedUserInterestedIn, Model20m145kUpdated) -> favBasedUserInterestedIn20M145KUpdatedStore,
+    (FavBasedUserInterestedIn, Model20m145k2020) -> favBasedUserInterestedIn20M145K2020Store,
+    (FollowBasedUserInterestedIn, Model20m145k2020) -> followBasedUserInterestedIn20M145K2020Store,
+    (LogFavBasedUserInterestedIn, Model20m145k2020) -> logFavBasedUserInterestedIn20M145K2020Store,
+    (
+      FavBasedUserInterestedInFromPE,
+      Model20m145kUpdated) -> favBasedUserInterestedInFromPE20M145KUpdatedStore,
+    (FilteredUserInterestedIn, Model20m145kUpdated) -> filteredUserInterestedIn20m145kUpdatedStore,
+    (FilteredUserInterestedIn, Model20m145k2020) -> filteredUserInterestedIn20m145k2020Store,
+    (
+      FilteredUserInterestedInFromPE,
+      Model20m145kUpdated) -> filteredUserInterestedInFromPE20m145kUpdatedStore,
+    (
+      UnfilteredUserInterestedIn,
+      Model20m145kUpdated) -> unfilteredUserInterestedIn20m145kUpdatedStore,
+    (UnfilteredUserInterestedIn, Model20m145k2020) -> unfilteredUserInterestedIn20m145k2020Store,
+    (UserNextInterestedIn, Model20m145k2020) -> userNextInterestedIn20m145k2020Store,
+    (
+      LogFavBasedUserInterestedMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020) -> logFavBasedInterestedMaxpoolingAddressBookFromIIAPE20M145K2020Store,
+    (
+      LogFavBasedUserInterestedAverageAddressBookFromIIAPE,
+      Model20m145k2020) -> logFavBasedInterestedAverageAddressBookFromIIAPE20M145K2020Store,
+    (
+      LogFavBasedUserInterestedBooktypeMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020) -> logFavBasedUserInterestedBooktypeMaxpoolingAddressBookFromIIAPE20M145K2020Store,
+    (
+      LogFavBasedUserInterestedLargestDimMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020) -> logFavBasedUserInterestedLargestDimMaxpoolingAddressBookFromIIAPE20M145K2020Store,
+    (
+      LogFavBasedUserInterestedLouvainMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020) -> logFavBasedUserInterestedLouvainMaxpoolingAddressBookFromIIAPE20M145K2020Store,
+    (
+      LogFavBasedUserInterestedConnectedMaxpoolingAddressBookFromIIAPE,
+      Model20m145k2020) -> logFavBasedUserInterestedConnectedMaxpoolingAddressBookFromIIAPE20M145K2020Store,
+  )
+
+  val userSimClustersEmbeddingStore: ReadableStore[
+    SimClustersEmbeddingId,
+    SimClustersEmbedding
+  ] = {
+    SimClustersEmbeddingStore.buildWithDecider(
+      underlyingStores = underlyingStores,
+      decider = rmsDecider.decider,
+      statsReceiver = stats
+    )
+  }
+
+}
--- a/representation-manager/server/src/main/thrift/BUILD
+++ b/representation-manager/server/src/main/thrift/BUILD
@ -0,0 +1,18 @@
+create_thrift_libraries(
+    base_name = "thrift",
+    sources = [
+        "com/twitter/representation_manager/service.thrift",
+    ],
+    platform = "java8",
+    tags = [
+        "bazel-compatible",
+    ],
+    dependency_roots = [
+        "src/thrift/com/twitter/simclusters_v2:simclusters_v2-thrift",
+    ],
+    generate_languages = [
+        "java",
+        "scala",
+        "strato",
+    ],
+)
--- a/representation-manager/server/src/main/thrift/com/twitter/representation_manager/service.thrift
+++ b/representation-manager/server/src/main/thrift/com/twitter/representation_manager/service.thrift
@ -0,0 +1,14 @@
+namespace java com.twitter.representation_manager.thriftjava
+#@namespace scala com.twitter.representation_manager.thriftscala
+#@namespace strato com.twitter.representation_manager
+
+include "com/twitter/simclusters_v2/online_store.thrift"
+include "com/twitter/simclusters_v2/identifier.thrift"
+
+/**
+  * A uniform column view for all kinds of SimClusters based embeddings.
+  **/
+struct SimClustersEmbeddingView {
+  1: required identifier.EmbeddingType embeddingType
+  2: required online_store.ModelVersion modelVersion
+}(persisted = 'false', hasPersonalData = 'false')
				`@ -0,0 +1 @@`
				`# This prevents SQ query from grabbing //:all since it traverses up once to find a BUILD`