Package org.apache.hadoop.hdfs.server.common.sps

Class BlockDispatcher

java.lang.Object

org.apache.hadoop.hdfs.server.common.sps.BlockDispatcher

@Private
@Evolving
public class BlockDispatcher
extends java.lang.Object

Dispatching block replica moves between datanodes to satisfy the storage policy.

Constructor Summary

Constructors

Constructor	Description
BlockDispatcher(int sockTimeout, int ioFileBuffSize, boolean connectToDatanodeViaHostname)	Construct block dispatcher details.

Method Summary

Modifier and Type	Method	Description
BlockMovementStatus	moveBlock(BlockStorageMovementCommand.BlockMovingInfo blkMovingInfo, org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient saslClient, org.apache.hadoop.hdfs.protocol.ExtendedBlock eb, java.net.Socket sock, org.apache.hadoop.hdfs.protocol.datatransfer.sasl.DataEncryptionKeyFactory km, org.apache.hadoop.security.token.Token<org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier> accessToken)	Moves the given block replica to the given target node and wait for the response.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BlockDispatcher

public BlockDispatcher(int sockTimeout,
                       int ioFileBuffSize,
                       boolean connectToDatanodeViaHostname)

Construct block dispatcher details.

Parameters:

sockTimeout - soTimeout

ioFileBuffSize - file io buffer size

connectToDatanodeViaHostname - true represents connect via hostname, false otw

Method Detail

moveBlock

public BlockMovementStatus moveBlock(BlockStorageMovementCommand.BlockMovingInfo blkMovingInfo,
                                     org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient saslClient,
                                     org.apache.hadoop.hdfs.protocol.ExtendedBlock eb,
                                     java.net.Socket sock,
                                     org.apache.hadoop.hdfs.protocol.datatransfer.sasl.DataEncryptionKeyFactory km,
                                     org.apache.hadoop.security.token.Token<org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier> accessToken)
                              throws java.io.IOException

Moves the given block replica to the given target node and wait for the response.

Parameters:

blkMovingInfo - block to storage info

saslClient - SASL for DataTransferProtocol on behalf of a client

eb - extended block info

sock - target node's socket

km - for creation of an encryption key

accessToken - connection block access token

Returns:

status of the block movement

Throws:

java.io.IOException