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https://issues.apache.org/jira/browse/HDFS-4114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13817717#comment-13817717
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Suresh Srinivas commented on HDFS-4114:
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[~shv], its been a while since there has been a discussion about this jira. I
do not know of many people using BackupNode. Is this a good time to start the
discussion about deprecate and remove support for BackupNode? Do you still
think we need to retain the support for BackupNode?
The main reason for this is - if this functionality is not used by anyone,
maintaining it adds unnecessary work. As an example, when I added support for
retry cache there were bunch of code paths related to backupnode that added
unnecessary work.
> 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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