Package org.apache.hadoop.hdfs

Class DFSHedgedReadMetrics

java.lang.Object

org.apache.hadoop.hdfs.DFSHedgedReadMetrics

@Private
public class DFSHedgedReadMetrics
extends Object

The client-side metrics for hedged read feature. This class has a number of metrics variables that are publicly accessible, we can grab them from client side, like HBase.

Field Summary

Fields

Modifier and Type	Field	Description
final LongAdder	hedgedReadOps
final LongAdder	hedgedReadOpsInCurThread
final LongAdder	hedgedReadOpsWin

Constructor Summary

Constructors

Constructor	Description
DFSHedgedReadMetrics()

Method Summary

Modifier and Type	Method	Description
long	getHedgedReadOps()
long	getHedgedReadOpsInCurThread()
long	getHedgedReadWins()
void	incHedgedReadOps()
void	incHedgedReadOpsInCurThread()
void	incHedgedReadWins()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

hedgedReadOps

public final LongAdder hedgedReadOps

hedgedReadOpsWin

public final LongAdder hedgedReadOpsWin

hedgedReadOpsInCurThread

public final LongAdder hedgedReadOpsInCurThread

Constructor Details

DFSHedgedReadMetrics

public DFSHedgedReadMetrics()

Method Details

incHedgedReadOps

public void incHedgedReadOps()

incHedgedReadOpsInCurThread

public void incHedgedReadOpsInCurThread()

incHedgedReadWins

public void incHedgedReadWins()

getHedgedReadOps

public long getHedgedReadOps()

getHedgedReadOpsInCurThread

public long getHedgedReadOpsInCurThread()

getHedgedReadWins

public long getHedgedReadWins()