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https://issues.apache.org/jira/browse/HDFS-2736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eli Collins resolved HDFS-2736.
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Resolution: Won't Fix
I was thinking about the case where the former active remains dead for some
time. But this case is problematic for a number of other reasons (eg with just
a single host we can't failback if necessary) so I think its reasonable to
require users start another SBN instead also deploying a 2NN. Closing as won't
fix, can re-open if others disagree.
> HA: support separate SBN and 2NN?
> ---------------------------------
>
> Key: HDFS-2736
> URL: https://issues.apache.org/jira/browse/HDFS-2736
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha
> Affects Versions: HA branch (HDFS-1623)
> Reporter: Eli Collins
>
> HDFS-2291 adds support for making the SBN capable of checkpointing, seems
> like we may also need to support the 2NN checkpointing as well. Eg if we fail
> over to the SBN does it continue to checkpoint? If not the log grows
> unbounded until the old primary comes back, if so does that create
> performance problems since the primary wasn't previously checkpointing?
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