org.apache.hadoop.hdfs.server.namenode

接口 NameNodeMXBean

所有已知实现类:

FSNamesystem

public interface NameNodeMXBean

This is the JMX management interface for namenode information

方法概要

方法

限定符和类型	方法和说明
String	getDeadNodes() Gets the dead node information of the cluster.
String	getDecomNodes() Gets the decommissioning node information of the cluster.
long	getFree() Gets total non-used raw bytes.
String	getHostName()
String	getLiveNodes() Gets the live node information of the cluster.
String	getNameDirStatuses() Get status information about the directories storing image and edits logs of the NN.
long	getNonDfsUsedSpace() Gets total used space by data nodes for non DFS purposes such as storing temporary files on the local file system
float	getPercentRemaining() Gets the total remaining space by data nodes as percentage of total capacity
float	getPercentUsed() Gets the total used space by data nodes as percentage of total capacity
String	getSafemode() Gets the safemode status
int	getThreads() Gets the number of threads.
long	getTotal() Gets total raw bytes including non-dfs used space.
long	getTotalBlocks() Gets the total numbers of blocks on the cluster.
long	getTotalFiles() Gets the total number of files on the cluster
long	getUsed() Gets the used space by data nodes.
String	getVersion() Gets the version of Hadoop.
boolean	isUpgradeFinalized() Checks if upgrade is finalized.

方法详细资料

getHostName

String getHostName()

返回:

the host name

getVersion

String getVersion()

Gets the version of Hadoop.

返回:

the version

getUsed

long getUsed()

Gets the used space by data nodes.

返回:

the used space by data nodes

getFree

long getFree()

Gets total non-used raw bytes.

返回:

total non-used raw bytes

getTotal

long getTotal()

Gets total raw bytes including non-dfs used space.

返回:

the total raw bytes including non-dfs used space

getSafemode

String getSafemode()

Gets the safemode status

返回:

the safemode status

isUpgradeFinalized

boolean isUpgradeFinalized()

Checks if upgrade is finalized.

返回:

true, if upgrade is finalized

getNonDfsUsedSpace

long getNonDfsUsedSpace()

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

返回:

the non dfs space of the cluster

getPercentUsed

float getPercentUsed()

Gets the total used space by data nodes as percentage of total capacity

返回:

the percentage of used space on the cluster.

getPercentRemaining

float getPercentRemaining()

Gets the total remaining space by data nodes as percentage of total capacity

返回:

the percentage of the remaining space on the cluster

getTotalBlocks

long getTotalBlocks()

Gets the total numbers of blocks on the cluster.

返回:

the total number of blocks of the cluster

getTotalFiles

long getTotalFiles()

Gets the total number of files on the cluster

返回:

the total number of files on the cluster

getThreads

int getThreads()

Gets the number of threads.

返回:

the number of threads

getLiveNodes

String getLiveNodes()

Gets the live node information of the cluster.

返回:

the live node information

getDeadNodes

String getDeadNodes()

Gets the dead node information of the cluster.

返回:

the dead node information

getDecomNodes

String getDecomNodes()

Gets the decommissioning node information of the cluster.

返回:

the decommissioning node information

getNameDirStatuses

String getNameDirStatuses()

Get status information about the directories storing image and edits logs of the NN.

返回:

the name dir status information, as a JSON string.