Package org.apache.hadoop.hdfs.server.protocol

Class DataNodeUsageReport

java.lang.Object

org.apache.hadoop.hdfs.server.protocol.DataNodeUsageReport

@Private
@Unstable
public final class DataNodeUsageReport
extends java.lang.Object

A class that allows DataNode to communicate information about usage statistics/metrics to NameNode.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DataNodeUsageReport.Builder	Builder class for DataNodeUsageReport.

Field Summary

Fields

Modifier and Type	Field	Description
static DataNodeUsageReport	EMPTY_REPORT	An object representing a DataNodeUsageReport with default values.

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object o)
long	getBlocksReadPerSec()
long	getBlocksWrittenPerSec()
long	getBytesReadPerSec()
long	getBytesWrittenPerSec()
long	getReadTime()
long	getTimestamp()
long	getWriteTime()
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

EMPTY_REPORT

public static final DataNodeUsageReport EMPTY_REPORT

An object representing a DataNodeUsageReport with default values. Should be used instead of null or creating new objects when there are no statistics to report.

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

getBytesWrittenPerSec

public long getBytesWrittenPerSec()

getBytesReadPerSec

public long getBytesReadPerSec()

getWriteTime

public long getWriteTime()

getReadTime

public long getReadTime()

getBlocksWrittenPerSec

public long getBlocksWrittenPerSec()

getBlocksReadPerSec

public long getBlocksReadPerSec()

getTimestamp

public long getTimestamp()