Package org.apache.hadoop.hdfs.server.datanode

Interface Replica

All Known Subinterfaces:
ReplicaInPipeline
All Known Implementing Classes:
BlockListAsLongs.BlockReportReplica, FinalizedProvidedReplica, FinalizedReplica, LocalReplica, LocalReplicaInPipeline, ProvidedReplica, ReplicaBeingWritten, ReplicaInfo, ReplicaUnderRecovery, ReplicaWaitingToBeRecovered
@Private public interface Replica
This represents block replicas which are stored in DataNode.

  • Method Details

    • getBlockId

      long getBlockId()
      Get the block ID

    • getGenerationStamp

      long getGenerationStamp()
      Get the generation stamp

    • getState

      HdfsServerConstants.ReplicaState getState()
      Get the replica state
      Returns:
      the replica state

    • getNumBytes

      long getNumBytes()
      Get the number of bytes received
      Returns:
      the number of bytes that have been received

    • getBytesOnDisk

      long getBytesOnDisk()
      Get the number of bytes that have written to disk
      Returns:
      the number of bytes that have written to disk

    • getVisibleLength

      long getVisibleLength()
      Get the number of bytes that are visible to readers
      Returns:
      the number of bytes that are visible to readers

    • getStorageUuid

      String getStorageUuid()
      Return the storageUuid of the volume that stores this replica.

    • isOnTransientStorage

      boolean isOnTransientStorage()
      Return true if the target volume is backed by RAM.

    • getVolume

      FsVolumeSpi getVolume()
      Get the volume of replica.
      Returns:
      the volume of replica