Package org.apache.hadoop.ozone.container.upgrade

Class VersionedDatanodeFeatures.ScmHA

java.lang.Object

org.apache.hadoop.ozone.container.upgrade.VersionedDatanodeFeatures.ScmHA

Enclosing class:

VersionedDatanodeFeatures

public static class VersionedDatanodeFeatures.ScmHA
extends Object

Utilities for SCM HA layout feature. Prior to SCM HA finalization, datanode volumes used the format <volume>/hdds/<scm-id>. After SCM HA, the expected format is <volume>/hdds/<cluster-id>. In pre-finalize for SCM HA, datanodes will still use the SCM ID for container file paths. The exception is if the cluster is already using cluster ID paths (since SCM HA was merged before the upgrade framework). In this case, cluster ID paths should continue to be used. On finalization of SCM HA, datanodes will create a symlink from the SCM ID directory to the cluster ID directory and use cluster ID in container file paths. If a cluster ID directory is already present, no changes are made.

Constructor Summary

Constructors

Constructor	Description
ScmHA()

Method Summary

Modifier and Type	Method	Description
static String	chooseContainerPathID(StorageVolume volume, String clusterID)	Choose whether to use cluster ID or SCM ID based on the format of the volume and SCM HA finalization status.
static boolean	upgradeVolumeIfNeeded(StorageVolume volume, String clusterID)

Methods inherited from class java.lang.Object

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

Constructor Details

ScmHA

public ScmHA()

Method Details

chooseContainerPathID

public static String chooseContainerPathID(StorageVolume volume,
 String clusterID)
                                    throws IOException

Choose whether to use cluster ID or SCM ID based on the format of the volume and SCM HA finalization status.

Throws:

IOException

upgradeVolumeIfNeeded

public static boolean upgradeVolumeIfNeeded(StorageVolume volume,
 String clusterID)