Inline objects

java/runtime/src/main/java/org/ray/runtime/config/RayConfig.java

@@ -6,8 +6,10 @@
 import com.typesafe.config.Config;
 import com.typesafe.config.ConfigException;
 import com.typesafe.config.ConfigFactory;
+import com.typesafe.config.ConfigValue;
 
 import java.io.File;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 import org.ray.api.id.UniqueId;
@@ -50,6 +52,7 @@ public class RayConfig {
   public final Long objectStoreSize;
 
   public final String rayletSocketName;
+  public final List<String> rayletConfigParameters;
 
   public final String redisServerExecutablePath;
   public final String redisModulePath;
@@ -162,6 +165,14 @@ public RayConfig(Config config) {
     // raylet socket name
     rayletSocketName = config.getString("ray.raylet.socket-name");
 
+    // raylet parameters
+    rayletConfigParameters = new ArrayList<String>();
+    Config rayletConfig = config.getConfig("ray.raylet.config");
+    for (java.util.Map.Entry<java.lang.String,ConfigValue> entry : rayletConfig.entrySet()) {
+      String parameter = entry.getKey() + "," + String.valueOf(entry.getValue().unwrapped());
+      rayletConfigParameters.add(parameter);
+    }
+
     // library path
     this.libraryPath = new ImmutableList.Builder<String>().add(
         rayHome + "/build/src/plasma",

java/runtime/src/main/java/org/ray/runtime/runner/RunManager.java

@@ -205,7 +205,7 @@ private void startRaylet() {
         "0", // number of initial workers
         String.valueOf(maximumStartupConcurrency),
         ResourceUtil.getResourcesStringFromMap(rayConfig.resources),
-        "",  // The internal config list.
+        String.join(",", rayConfig.rayletConfigParameters),  // The internal config list.
         buildPythonWorkerCommand(), // python worker command
         buildWorkerCommandRaylet() // java worker command
     );

java/runtime/src/main/resources/ray.default.conf

@@ -85,6 +85,10 @@ ray {
   raylet {
     // RPC socket name of Raylet
     socket-name: /tmp/ray/sockets/raylet
+
+    // See src/ray/ray_config_def.h for options.
+    config {
+    }
   }
 
 }

java/test/src/main/java/org/ray/api/test/BaseTest.java

@@ -13,6 +13,7 @@ public class BaseTest {
   public void setUp() {
     System.setProperty("ray.home", "../..");
     System.setProperty("ray.resources", "CPU:4,RES-A:4");
+    System.setProperty("ray.raylet.config.inline_object_max_size_bytes", "0");
     Ray.init();
   }
 
@@ -29,6 +30,7 @@ public void tearDown() {
     // unset system properties
     System.clearProperty("ray.home");
     System.clearProperty("ray.resources");
+    System.clearProperty("ray.raylet.config.inline_object_max_size_bytes");
   }
 
 }

src/ray/gcs/format/gcs.fbs

@@ -122,12 +122,20 @@ table FunctionTableData {
 table ObjectTableData {
   // The size of the object.
   object_size: long;
+  // Is object in-lined?  Inline objects are objects whose data and metadata are
+  // inlined in the GCS object table entry, which normally only specifies
+  // the object location.
+  inline_object_flag: bool;
   // The node manager ID that this object appeared on or was evicted by.
   manager: string;
   // Whether this entry is an addition or a deletion.
   is_eviction: bool;
   // The number of times this object has been evicted from this node so far.
   num_evictions: int;
+  // In-line object data.
+  inline_object_data: [ubyte];
+  // In-line object metadata.
+  inline_object_metadata: [ubyte];
 }
 
 table TaskReconstructionData {

src/ray/object_manager/object_directory.cc

@@ -8,41 +8,67 @@ ObjectDirectory::ObjectDirectory(boost::asio::io_service &io_service,
 
 namespace {
 
-/// Process a suffix of the object table log and store the result in
-/// client_ids. This assumes that client_ids already contains the result of the
-/// object table log up to but not including this suffix. This also stores a
-/// bool in has_been_created indicating whether the object has ever been
-/// created before.
+/// Process a suffix of the object table log.
+/// If object is inlined (inline_object_flag = TRUE), its data and metadata are
+/// stored with the object's entry so we read them into inline_object_data, and
+/// inline_object_metadata, respectively.
+/// If object is not inlined, store the result in client_ids.
+/// This assumes that client_ids already contains the result of the
+/// object table log up to but not including this suffix.
+/// This function also stores a bool in has_been_created indicating whether the
+/// object has ever been created before.
 void UpdateObjectLocations(const std::vector<ObjectTableDataT> &location_history,
                            const ray::gcs::ClientTable &client_table,
                            std::unordered_set<ClientID> *client_ids,
-                           bool *has_been_created) {
+                           bool *inline_object_flag,
+                           std::vector<uint8_t> *inline_object_data,
+                           std::string *inline_object_metadata, bool *has_been_created) {
   // location_history contains the history of locations of the object (it is a log),
   // which might look like the following:
   //   client1.is_eviction = false
   //   client1.is_eviction = true
   //   client2.is_eviction = false
   // In such a scenario, we want to indicate client2 is the only client that contains
   // the object, which the following code achieves.
+  //
+  // If object is inlined each entry contains both the object's data and metadata,
+  // so we don't care about its location.
   if (!location_history.empty()) {
     // If there are entries, then the object has been created. Once this flag
     // is set to true, it should never go back to false.
     *has_been_created = true;
   }
   for (const auto &object_table_data : location_history) {
     ClientID client_id = ClientID::from_binary(object_table_data.manager);
+    if (object_table_data.inline_object_flag) {
+      if (!*inline_object_flag) {
+        // This is the first time we're receiving the inline object data. Read
+        // object's data from the GCS entry.
+        *inline_object_flag = object_table_data.inline_object_flag;
+        inline_object_data->assign(object_table_data.inline_object_data.begin(),
+                                   object_table_data.inline_object_data.end());
+        inline_object_metadata->assign(object_table_data.inline_object_metadata.begin(),
+                                       object_table_data.inline_object_metadata.end());
+      }
+      // We got the data and metadata of the object so exit the loop.
+      break;
+    }
+
     if (!object_table_data.is_eviction) {
       client_ids->insert(client_id);
     } else {
       client_ids->erase(client_id);
     }
   }
-  // Filter out the removed clients from the object locations.
-  for (auto it = client_ids->begin(); it != client_ids->end();) {
-    if (client_table.IsRemoved(*it)) {
-      it = client_ids->erase(it);
-    } else {
-      it++;
+
+  if (!*inline_object_flag) {
+    // Filter out the removed clients from the object locations.
+    for (auto it = client_ids->begin(); it != client_ids->end();) {
+      if (client_table.IsRemoved(*it)) {
+        it = client_ids->erase(it);
+      } else {
+        it++;
+      }
     }
   }
 }
@@ -62,6 +88,8 @@ void ObjectDirectory::RegisterBackend() {
     // Update entries for this object.
     UpdateObjectLocations(location_history, gcs_client_->client_table(),
                           &it->second.current_object_locations,
+                          &it->second.inline_object_flag, &it->second.inline_object_data,
+                          &it->second.inline_object_metadata,
                           &it->second.has_been_created);
     // Copy the callbacks so that the callbacks can unsubscribe without interrupting
     // looping over the callbacks.
@@ -74,6 +102,8 @@ void ObjectDirectory::RegisterBackend() {
       // It is safe to call the callback directly since this is already running
       // in the subscription callback stack.
       callback_pair.second(object_id, it->second.current_object_locations,
+                           it->second.inline_object_flag, it->second.inline_object_data,
+                           it->second.inline_object_metadata,
                            it->second.has_been_created);
     }
   };
@@ -84,20 +114,32 @@ void ObjectDirectory::RegisterBackend() {
 
 ray::Status ObjectDirectory::ReportObjectAdded(
     const ObjectID &object_id, const ClientID &client_id,
-    const object_manager::protocol::ObjectInfoT &object_info) {
+    const object_manager::protocol::ObjectInfoT &object_info, bool inline_object_flag,
+    const std::vector<uint8_t> &inline_object_data,
+    const std::string &inline_object_metadata) {
+  RAY_LOG(DEBUG) << "Reporting object added to GCS " << object_id << " inline? "
+                 << inline_object_flag;
   // Append the addition entry to the object table.
   auto data = std::make_shared<ObjectTableDataT>();
   data->manager = client_id.binary();
   data->is_eviction = false;
   data->num_evictions = object_evictions_[object_id];
   data->object_size = object_info.data_size;
+  data->inline_object_flag = inline_object_flag;
+  if (inline_object_flag) {
+    // Add object's data to its GCS entry.
+    data->inline_object_data.assign(inline_object_data.begin(), inline_object_data.end());
+    data->inline_object_metadata.assign(inline_object_metadata.begin(),
+                                        inline_object_metadata.end());
+  }
   ray::Status status =
       gcs_client_->object_table().Append(JobID::nil(), object_id, data, nullptr);
   return status;
 }
 
 ray::Status ObjectDirectory::ReportObjectRemoved(const ObjectID &object_id,
                                                  const ClientID &client_id) {
+  RAY_LOG(DEBUG) << "Reporting object removed to GCS " << object_id;
   // Append the eviction entry to the object table.
   auto data = std::make_shared<ObjectTableDataT>();
   data->manager = client_id.binary();
@@ -147,16 +189,19 @@ void ObjectDirectory::HandleClientRemoved(const ClientID &client_id) {
     if (listener.second.current_object_locations.count(client_id) > 0) {
       // If the subscribed object has the removed client as a location, update
       // its locations with an empty log so that the location will be removed.
-      UpdateObjectLocations({}, gcs_client_->client_table(),
-                            &listener.second.current_object_locations,
-                            &listener.second.has_been_created);
+      UpdateObjectLocations(
+          {}, gcs_client_->client_table(), &listener.second.current_object_locations,
+          &listener.second.inline_object_flag, &listener.second.inline_object_data,
+          &listener.second.inline_object_metadata, &listener.second.has_been_created);
       // Re-call all the subscribed callbacks for the object, since its
       // locations have changed.
       for (const auto &callback_pair : listener.second.callbacks) {
         // It is safe to call the callback directly since this is already running
         // in the subscription callback stack.
-        callback_pair.second(object_id, listener.second.current_object_locations,
-                             listener.second.has_been_created);
+        callback_pair.second(
+            object_id, listener.second.current_object_locations,
+            listener.second.inline_object_flag, listener.second.inline_object_data,
+            listener.second.inline_object_metadata, listener.second.has_been_created);
       }
     }
   }
@@ -182,8 +227,14 @@ ray::Status ObjectDirectory::SubscribeObjectLocations(const UniqueID &callback_i
   // immediately notify the caller of the current known locations.
   if (listener_state.has_been_created) {
     auto &locations = listener_state.current_object_locations;
-    io_service_.post([callback, locations, object_id]() {
-      callback(object_id, locations, /*has_been_created=*/true);
+    auto inline_object_flag = listener_state.inline_object_flag;
+    const auto &inline_object_data = listener_state.inline_object_data;
+    const auto &inline_object_metadata = listener_state.inline_object_metadata;
+    io_service_.post([callback, locations, inline_object_flag, inline_object_data,
+                      inline_object_metadata, object_id]() {
+      callback(object_id, locations, inline_object_flag, inline_object_data,
+               inline_object_metadata,
+               /*has_been_created=*/true);
     });
   }
   return status;
@@ -216,20 +267,31 @@ ray::Status ObjectDirectory::LookupLocations(const ObjectID &object_id,
                          const std::vector<ObjectTableDataT> &location_history) {
           // Build the set of current locations based on the entries in the log.
           std::unordered_set<ClientID> client_ids;
+          bool inline_object_flag = false;
+          std::vector<uint8_t> inline_object_data;
+          std::string inline_object_metadata;
           bool has_been_created = false;
           UpdateObjectLocations(location_history, gcs_client_->client_table(),
-                                &client_ids, &has_been_created);
+                                &client_ids, &inline_object_flag, &inline_object_data,
+                                &inline_object_metadata, &has_been_created);
           // It is safe to call the callback directly since this is already running
           // in the GCS client's lookup callback stack.
-          callback(object_id, client_ids, has_been_created);
+          callback(object_id, client_ids, inline_object_flag, inline_object_data,
+                   inline_object_metadata, has_been_created);
         });
   } else {
     // If we have locations cached due to a concurrent SubscribeObjectLocations
     // call, call the callback immediately with the cached locations.
+    // If object inlined, we already have the object's data.
     auto &locations = it->second.current_object_locations;
     bool has_been_created = it->second.has_been_created;
-    io_service_.post([callback, object_id, locations, has_been_created]() {
-      callback(object_id, locations, has_been_created);
+    bool inline_object_flag = it->second.inline_object_flag;
+    const auto &inline_object_data = it->second.inline_object_data;
+    const auto &inline_object_metadata = it->second.inline_object_metadata;
+    io_service_.post([callback, object_id, locations, inline_object_flag,
+                      inline_object_data, inline_object_metadata, has_been_created]() {
+      callback(object_id, locations, inline_object_flag, inline_object_data,
+               inline_object_metadata, has_been_created);
     });
   }
   return status;

src/ray/object_manager/object_directory.h

@@ -48,9 +48,9 @@ class ObjectDirectoryInterface {
   virtual std::vector<RemoteConnectionInfo> LookupAllRemoteConnections() const = 0;
 
   /// Callback for object location notifications.
-  using OnLocationsFound = std::function<void(const ray::ObjectID &object_id,
-                                              const std::unordered_set<ray::ClientID> &,
-                                              bool has_been_created)>;
+  using OnLocationsFound = std::function<void(
+      const ray::ObjectID &object_id, const std::unordered_set<ray::ClientID> &, bool,
+      const std::vector<uint8_t> &, const std::string &, bool has_been_created)>;
 
   /// Lookup object locations. Callback may be invoked with empty list of client ids.
   ///
@@ -99,10 +99,15 @@ class ObjectDirectoryInterface {
   /// \param object_id The object id that was put into the store.
   /// \param client_id The client id corresponding to this node.
   /// \param object_info Additional information about the object.
+  /// \param inline_object_flag Flag specifying whether object is inlined.
+  /// \param inline_object_data Object data. Only for inlined objects.
+  /// \param inline_object_metadata Object metadata. Only for inlined objects.
   /// \return Status of whether this method succeeded.
   virtual ray::Status ReportObjectAdded(
       const ObjectID &object_id, const ClientID &client_id,
-      const object_manager::protocol::ObjectInfoT &object_info) = 0;
+      const object_manager::protocol::ObjectInfoT &object_info, bool inline_object_flag,
+      const std::vector<uint8_t> &inline_object_data,
+      const std::string &inline_object_metadata) = 0;
 
   /// Report objects removed from this client's store to the object directory.
   ///
@@ -154,9 +159,12 @@ class ObjectDirectory : public ObjectDirectoryInterface {
   ray::Status UnsubscribeObjectLocations(const UniqueID &callback_id,
                                          const ObjectID &object_id) override;
 
-  ray::Status ReportObjectAdded(
-      const ObjectID &object_id, const ClientID &client_id,
-      const object_manager::protocol::ObjectInfoT &object_info) override;
+  ray::Status ReportObjectAdded(const ObjectID &object_id, const ClientID &client_id,
+                                const object_manager::protocol::ObjectInfoT &object_info,
+                                bool inline_object_flag,
+                                const std::vector<uint8_t> &inline_object_data,
+                                const std::string &inline_object_metadata) override;
+
   ray::Status ReportObjectRemoved(const ObjectID &object_id,
                                   const ClientID &client_id) override;
 
@@ -174,6 +182,15 @@ class ObjectDirectory : public ObjectDirectoryInterface {
     std::unordered_map<UniqueID, OnLocationsFound> callbacks;
     /// The current set of known locations of this object.
     std::unordered_set<ClientID> current_object_locations;
+    /// Specify whether the object is inlined. The data and the metadata of
+    /// an inlined object are stored in the object's GCS entry. In this flag
+    /// (i.e., the object is inlined) the content of current_object_locations
+    /// can be ignored.
+    bool inline_object_flag;
+    /// Inlined object data, if inline_object_flag == true.
+    std::vector<uint8_t> inline_object_data;
+    /// Inlined object metadata, if inline_object_flag == true.
+    std::string inline_object_metadata;
     /// This flag will get set to true if the object has ever been created. It
     /// should never go back to false once set to true. If this is true, and
     /// the current_object_locations is empty, then this means that the object