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

Class VolumeFailureSummary

java.lang.Object

org.apache.hadoop.hdfs.server.protocol.VolumeFailureSummary

public class VolumeFailureSummary
extends Object

Summarizes information about data volume failures on a DataNode.

Constructor Summary

Constructors

Constructor	Description
VolumeFailureSummary(String[] failedStorageLocations, long lastVolumeFailureDate, long estimatedCapacityLostTotal)	Creates a new VolumeFailureSummary.

Method Summary

Modifier and Type	Method	Description
long	getEstimatedCapacityLostTotal()	Returns estimate of capacity lost.
String[]	getFailedStorageLocations()	Returns each storage location that has failed, sorted.
long	getLastVolumeFailureDate()	Returns the date/time of the last volume failure in milliseconds since epoch.

Methods inherited from class java.lang.Object

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

Constructor Details

VolumeFailureSummary

public VolumeFailureSummary(String[] failedStorageLocations,
 long lastVolumeFailureDate,
 long estimatedCapacityLostTotal)

Creates a new VolumeFailureSummary.

Parameters:

failedStorageLocations - storage locations that have failed

lastVolumeFailureDate - date/time of last volume failure in milliseconds since epoch

estimatedCapacityLostTotal - estimate of capacity lost in bytes

Method Details

getFailedStorageLocations

public String[] getFailedStorageLocations()

Returns each storage location that has failed, sorted.

Returns:

each storage location that has failed, sorted

getLastVolumeFailureDate

public long getLastVolumeFailureDate()

Returns the date/time of the last volume failure in milliseconds since epoch.

Returns:

date/time of last volume failure in milliseconds since epoch

getEstimatedCapacityLostTotal

public long getEstimatedCapacityLostTotal()

Returns estimate of capacity lost. This is said to be an estimate, because in some cases it's impossible to know the capacity of the volume, such as if we never had a chance to query its capacity before the failure occurred.

Returns:

estimate of capacity lost in bytes