org.apache.hadoop.hdfs.server.blockmanagement
Interface DatanodeStatistics

public interface DatanodeStatistics

Datanode statistics

Method Summary

long	getBlockPoolUsed()
long	getCapacityRemaining()
float	getCapacityRemainingPercent()
long	getCapacityTotal()
long	getCapacityUsed()
long	getCapacityUsedNonDFS()
float	getCapacityUsedPercent()
int	getExpiredHeartbeats()
float	getPercentBlockPoolUsed()
long[]	getStats() The same as ClientProtocol.getStats().
int	getXceiverCount()

Method Detail

getCapacityTotal

long getCapacityTotal()

Returns:

the total capacity

getCapacityUsed

long getCapacityUsed()

Returns:

the used capacity

getCapacityUsedPercent

float getCapacityUsedPercent()

Returns:

the percentage of the used capacity over the total capacity.

getCapacityRemaining

long getCapacityRemaining()

Returns:

the remaining capacity

getCapacityRemainingPercent

float getCapacityRemainingPercent()

Returns:

the percentage of the remaining capacity over the total capacity.

getBlockPoolUsed

long getBlockPoolUsed()

Returns:

the block pool used.

getPercentBlockPoolUsed

float getPercentBlockPoolUsed()

Returns:

the percentage of the block pool used space over the total capacity.

getXceiverCount

int getXceiverCount()

Returns:

the xceiver count

getCapacityUsedNonDFS

long getCapacityUsedNonDFS()

Returns:

the total used space by data nodes for non-DFS purposes such as storing temporary files on the local file system

getStats

long[] getStats()

The same as ClientProtocol.getStats(). The block related entries are set to -1.

getExpiredHeartbeats

int getExpiredHeartbeats()

Returns:

the expired heartbeats