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

Interface DiskBalancer.BlockMover

All Known Implementing Classes:

DiskBalancer.DiskBalancerMover

Enclosing class:

DiskBalancer

public static interface DiskBalancer.BlockMover

BlockMover supports moving blocks across Volumes.

Method Summary

Modifier and Type	Method	Description
void	copyBlocks(DiskBalancer.VolumePair pair, org.apache.hadoop.hdfs.server.datanode.DiskBalancerWorkItem item)	Copies blocks from a set of volumes.
FsDatasetSpi	getDataset()	Returns a pointer to the current dataset we are operating against.
long	getElapsedSeconds()	Number of seconds elapsed.
long	getStartTime()	Returns time when this plan started executing.
void	setExitFlag()	Tells copyBlocks to exit from the copy routine.
void	setRunnable()	Begin the actual copy operations.

Method Detail

copyBlocks

void copyBlocks(DiskBalancer.VolumePair pair,
                org.apache.hadoop.hdfs.server.datanode.DiskBalancerWorkItem item)

Copies blocks from a set of volumes.

Parameters:

pair - - Source and Destination Volumes.

item - - Number of bytes to move from volumes.

setRunnable

void setRunnable()

Begin the actual copy operations. This is useful in testing.

setExitFlag

void setExitFlag()

Tells copyBlocks to exit from the copy routine.

getDataset

FsDatasetSpi getDataset()

Returns a pointer to the current dataset we are operating against.

Returns:

FsDatasetSpi

getStartTime

long getStartTime()

Returns time when this plan started executing.

Returns:

Start time in milliseconds.

getElapsedSeconds

long getElapsedSeconds()

Number of seconds elapsed.

Returns:

time in seconds