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

public interface DatanodeStatistics

Datanode statistics

Method Summary

long	getBlockPoolUsed()
long	getCacheCapacity()
long	getCacheUsed()
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.

getCacheCapacity

long getCacheCapacity()

Returns:

the total cache capacity of all DataNodes

getCacheUsed

long getCacheUsed()

Returns:

the total cache used by all DataNodes

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