org.apache.hadoop.dfs.datanode.metrics
Interface FSDatasetMBean

All Known Subinterfaces:

FSDatasetInterface

public interface FSDatasetMBean

This Interface defines the methods to get the status of a the FSDataset of a data node. It is also used for publishing via JMX (hence we follow the JMX naming convention.)

Data Node runtime statistic info is report in another MBean

See Also:

DataNodeStatisticsMBean

Method Summary

long	getCapacity() Returns total capacity (in bytes) of storage (used and unused)
long	getDfsUsed() Returns the total space (in bytes) used by dfs datanode
long	getRemaining() Returns the amount of free storage space (in bytes)
String	getStorageInfo() Returns the storage id of the underlying storage

Method Detail

getDfsUsed

long getDfsUsed()
                throws IOException

Returns the total space (in bytes) used by dfs datanode

Returns:

the total space used by dfs datanode

Throws:

IOException

getCapacity

long getCapacity()
                 throws IOException

Returns total capacity (in bytes) of storage (used and unused)

Returns:

total capacity of storage (used and unused)

Throws:

IOException

getRemaining

long getRemaining()
                  throws IOException

Returns the amount of free storage space (in bytes)

Returns:

The amount of free storage space

Throws:

IOException

getStorageInfo

String getStorageInfo()

Returns the storage id of the underlying storage