org.apache.hadoop.hdfs.server.datanode.metrics

接口 FSDatasetMBean

所有已知子接口:

FSDatasetInterface

所有已知实现类:

FSDataset

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.) * Note we have not used the MetricsDynamicMBeanBase to implement this because the interface for the FSDatasetMBean is stable and should be published as an interface.

Data Node runtime statistic info is report in another MBean

另请参阅:

org.apache.hadoop.hdfs.server.datanode.metrics.DataNodeStatisticsMBean

方法概要

方法

限定符和类型	方法和说明
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

方法详细资料

getDfsUsed

long getDfsUsed()
                throws IOException

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

返回:

the total space used by dfs datanode

抛出:

IOException

getCapacity

long getCapacity()
                 throws IOException

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

返回:

total capacity of storage (used and unused)

抛出:

IOException

getRemaining

long getRemaining()
                  throws IOException

Returns the amount of free storage space (in bytes)

返回:

The amount of free storage space

抛出:

IOException

getStorageInfo

String getStorageInfo()

Returns the storage id of the underlying storage