org.apache.hadoop.hdfs

Class DFSOpsCountStatistics

java.lang.Object

org.apache.hadoop.fs.StorageStatistics

org.apache.hadoop.hdfs.DFSOpsCountStatistics

public class DFSOpsCountStatistics
extends org.apache.hadoop.fs.StorageStatistics

This storage statistics tracks how many times each DFS operation was issued. For each tracked DFS operation, there is a respective entry in the enum DFSOpsCountStatistics.OpType. To use, increment the value the DistributedFileSystem and WebHdfsFileSystem. This class is thread safe, and is generally shared by multiple threads.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DFSOpsCountStatistics.OpType This is for counting distributed file system operations.

Nested classes/interfaces inherited from class org.apache.hadoop.fs.StorageStatistics

org.apache.hadoop.fs.StorageStatistics.CommonStatisticNames, org.apache.hadoop.fs.StorageStatistics.LongStatistic

Field Summary

Fields

Modifier and Type	Field and Description
static String	NAME

Constructor Summary

Constructors

Constructor and Description
DFSOpsCountStatistics()

Method Summary

Methods

Modifier and Type	Method and Description
Long	getLong(String key)
Iterator<org.apache.hadoop.fs.StorageStatistics.LongStatistic>	getLongStatistics()
String	getScheme()
void	incrementOpCounter(DFSOpsCountStatistics.OpType op)
boolean	isTracked(String key)
void	reset()

Methods inherited from class org.apache.hadoop.fs.StorageStatistics

getName

Methods inherited from class java.lang.Object

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

Field Detail

NAME

public static final String NAME

See Also:

Constant Field Values

Constructor Detail

DFSOpsCountStatistics

public DFSOpsCountStatistics()

Method Detail

incrementOpCounter

public void incrementOpCounter(DFSOpsCountStatistics.OpType op)

getScheme

public String getScheme()

Overrides:

getScheme in class org.apache.hadoop.fs.StorageStatistics

getLongStatistics

public Iterator<org.apache.hadoop.fs.StorageStatistics.LongStatistic> getLongStatistics()

Specified by:

getLongStatistics in class org.apache.hadoop.fs.StorageStatistics

getLong

public Long getLong(String key)

Specified by:

getLong in class org.apache.hadoop.fs.StorageStatistics

isTracked

public boolean isTracked(String key)

Specified by:

isTracked in class org.apache.hadoop.fs.StorageStatistics

reset

public void reset()

Specified by:

reset in class org.apache.hadoop.fs.StorageStatistics