Package org.apache.hadoop.ozone.container.common.volume

Class RoundRobinVolumeChoosingPolicy

java.lang.Object

org.apache.hadoop.ozone.container.common.volume.RoundRobinVolumeChoosingPolicy

All Implemented Interfaces:

VolumeChoosingPolicy

public class RoundRobinVolumeChoosingPolicy
extends Object
implements VolumeChoosingPolicy

Choose volumes in round-robin order. The caller should synchronize access to the list of volumes.

Constructor Summary

Constructors

Constructor	Description
RoundRobinVolumeChoosingPolicy()

Method Summary

Modifier and Type	Method	Description
HddsVolume	chooseVolume(List<HddsVolume> volumes, long maxContainerSize)	Choose a volume to place a container, given a list of volumes and the max container size sought for storage.

Methods inherited from class java.lang.Object

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

Constructor Details

RoundRobinVolumeChoosingPolicy

public RoundRobinVolumeChoosingPolicy()

Method Details

chooseVolume

public HddsVolume chooseVolume(List<HddsVolume> volumes,
 long maxContainerSize)
                        throws IOException

Description copied from interface: VolumeChoosingPolicy

Choose a volume to place a container, given a list of volumes and the max container size sought for storage. The implementations of this interface must be thread-safe.

Specified by:

chooseVolume in interface VolumeChoosingPolicy

Parameters:

volumes - - a list of available volumes.

maxContainerSize - - the maximum size of the container for which a volume is sought.

Returns:

the chosen volume.

Throws:

IOException - when disks are unavailable or are full.