org.apache.hadoop.fs

Class FileSystem.Statistics.StatisticsData

java.lang.Object

org.apache.hadoop.fs.FileSystem.Statistics.StatisticsData

Enclosing class:

FileSystem.Statistics

public static class FileSystem.Statistics.StatisticsData
extends Object

Statistics data. There is only a single writer to thread-local StatisticsData objects. Hence, volatile is adequate here-- we do not need AtomicLong or similar to prevent lost updates. The Java specification guarantees that updates to volatile longs will be perceived as atomic with respect to other threads, which is all we need.

Constructor Summary

Constructors

Constructor and Description
FileSystem.Statistics.StatisticsData()

Method Summary

Methods

Modifier and Type	Method and Description
long	getBytesRead()
long	getBytesReadDistanceOfFiveOrLarger()
long	getBytesReadDistanceOfOneOrTwo()
long	getBytesReadDistanceOfThreeOrFour()
long	getBytesReadLocalHost()
long	getBytesWritten()
int	getLargeReadOps()
int	getReadOps()
int	getWriteOps()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

FileSystem.Statistics.StatisticsData

public FileSystem.Statistics.StatisticsData()

Method Detail

toString

public String toString()

Overrides:

toString in class Object

getBytesRead

public long getBytesRead()

getBytesWritten

public long getBytesWritten()

getReadOps

public int getReadOps()

getLargeReadOps

public int getLargeReadOps()

getWriteOps

public int getWriteOps()

getBytesReadLocalHost

public long getBytesReadLocalHost()

getBytesReadDistanceOfOneOrTwo

public long getBytesReadDistanceOfOneOrTwo()

getBytesReadDistanceOfThreeOrFour

public long getBytesReadDistanceOfThreeOrFour()

getBytesReadDistanceOfFiveOrLarger

public long getBytesReadDistanceOfFiveOrLarger()