org.apache.hadoop.hdfs.server.protocol

接口 InterDatanodeProtocol

所有超级接口:

VersionedProtocol

所有已知实现类:

DataNode

public interface InterDatanodeProtocol
extends VersionedProtocol

An inter-datanode protocol for updating generation stamp

字段概要

字段

限定符和类型	字段和说明
static org.apache.commons.logging.Log	LOG
static long	versionID 3: added a finalize parameter to updateBlock

方法概要

方法

限定符和类型	方法和说明
BlockMetaDataInfo	getBlockMetaDataInfo(Block block)
BlockRecoveryInfo	startBlockRecovery(Block block) Begin recovery on a block - this interrupts writers and returns the necessary metadata for recovery to begin.
void	updateBlock(Block oldblock, Block newblock, boolean finalize) Update the block to the new generation stamp and length.

从接口继承的方法 org.apache.hadoop.ipc.VersionedProtocol

getProtocolVersion

字段详细资料

LOG

static final org.apache.commons.logging.Log LOG

versionID

static final long versionID

3: added a finalize parameter to updateBlock

另请参阅:

常量字段值

方法详细资料

getBlockMetaDataInfo

BlockMetaDataInfo getBlockMetaDataInfo(Block block)
                                       throws IOException

返回:

the BlockMetaDataInfo of a block; null if the block is not found

抛出:

IOException

startBlockRecovery

BlockRecoveryInfo startBlockRecovery(Block block)
                                     throws IOException

Begin recovery on a block - this interrupts writers and returns the necessary metadata for recovery to begin.

返回:

the BlockRecoveryInfo for a block

抛出:

IOException

updateBlock

void updateBlock(Block oldblock,
               Block newblock,
               boolean finalize)
                 throws IOException

Update the block to the new generation stamp and length.

抛出:

IOException