| Package | Description | 
|---|---|
| org.apache.giraph.comm.flow_control | Package for flow-control policies. | 
| org.apache.giraph.comm.netty | Package for netty implementations. | 
| org.apache.giraph.graph | Package of all the graph related objects, built on the
 org.apache.bsp package. | 
| org.apache.giraph.master | Package of all the master related things. | 
| org.apache.giraph.metrics | Package of all the Giraph metrics related data. | 
| org.apache.giraph.ooc | Package of out-of-core related classes. | 
| org.apache.giraph.worker | Package of all the worker related things | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | StaticFlowControlRepresentation of a flow control that limits the aggregate number of open
 requests to all other workers to a constant user-defined value | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | InboundByteCounterKeep track of the bytes received and provide some metrics when
 desired as part of the Netty Channel stack. | 
| class  | NettyWorkerClient<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>Takes users facing APIs in  WorkerClientand implements them
 using the availableWritableRequestobjects. | 
| class  | OutboundByteCounterKeep track of the bytes sent and provide some metrics when
 desired as part of the Netty Channel stack. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | GraphTaskManager<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>The Giraph-specific business logic for a single BSP
 compute node in whatever underlying type of cluster
 our Giraph job will run on. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | BspServiceMaster<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>ZooKeeper-based implementation of  CentralizedServiceMaster. | 
| Modifier and Type | Method and Description | 
|---|---|
| void | GiraphMetrics. addSuperstepResetObserver(ResetSuperstepMetricsObserver observer)Anyone using per-superstep counters needs to re-initialize their Metrics
 object on each new superstep. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | OutOfCoreEngineClass to represent an out-of-core engine. | 
| class  | OutOfCoreIOCallableIO threads for out-of-core mechanism. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | BspServiceWorker<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>ZooKeeper-based implementation of  CentralizedServiceWorker. | 
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