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https://issues.apache.org/jira/browse/HDFS-4114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13491061#comment-13491061
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Todd Lipcon commented on HDFS-4114:
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bq. In federation, we wanted to use CheckpointNode for sharing a single
checkpointer for all the namenodes in a cluster, triggered based on crontab
My question is why that doesn't apply to the SecondaryNameNode just as well?
The 2NN and the CheckpointNode offer identical functionality, except that one
has been battle-tested whereas the other hasn't been run in production AFAIK.
> Deprecate the BackupNode and CheckpointNode in 2.0
> --------------------------------------------------
>
> Key: HDFS-4114
> URL: https://issues.apache.org/jira/browse/HDFS-4114
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Eli Collins
> Assignee: Eli Collins
>
> Per the thread on hdfs-dev@ (http://s.apache.org/tMT) let's remove the
> BackupNode and CheckpointNode.
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