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https://issues.apache.org/jira/browse/HDFS-2064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13076264#comment-13076264
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Dennis Oberhoff commented on HDFS-2064:
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No not yet. Currently you have to start the Node as BackUp Node. This will
import the fsimage to the SBN. After it you have to kill the Node and restart
it as Standby. Right now -importCheckpoint doesn't seem to do the work.Would be
nice if this procedure could be implemented into the Standby Mode.
> Warm HA NameNode going Hot
> --------------------------
>
> Key: HDFS-2064
> URL: https://issues.apache.org/jira/browse/HDFS-2064
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Priority: Blocker
> Attachments: WarmHA-GoingHot.pdf, failover-v-0.22.patch
>
>
> This is the design for automatic hot HA for HDFS NameNode. It involves use of
> HA software and LoadReplicator - external to Hadoop components, which
> substantially simplify the architecture by separating HA- from
> Hadoop-specific problems. Without the external components it provides warm
> standby with manual failover.
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