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https://issues.apache.org/jira/browse/HDFS-2291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13094863#comment-13094863
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Todd Lipcon commented on HDFS-2291:
-----------------------------------
Ravi: the docs are right -- the 2NN needs as much memory as the NN. But the
same is true of the SBN. But it's the same memory - a copy of the namespace,
etc.
So, I agree that the SBN should be able to do checkpoints. We just need to
implement a "checkpoint abort" functionality. I will look into this.
> HA: Checkpointing in an HA setup
> --------------------------------
>
> Key: HDFS-2291
> URL: https://issues.apache.org/jira/browse/HDFS-2291
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: name-node
> Affects Versions: HA branch (HDFS-1623)
> Reporter: Aaron T. Myers
> Assignee: Todd Lipcon
> Fix For: HA branch (HDFS-1623)
>
>
> We obviously need to create checkpoints when HA is enabled. One thought is to
> use a third, dedicated checkpointing node in addition to the active and
> standby nodes. Another option would be to make the standby capable of also
> performing the function of checkpointing.
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