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https://issues.apache.org/jira/browse/HBASE-1583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12727145#action_12727145
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stack commented on HBASE-1583:
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Small jgray suggested optimization; don't compact on open unless has References
> Start/Stop of large cluster untenable
> -------------------------------------
>
> Key: HBASE-1583
> URL: https://issues.apache.org/jira/browse/HBASE-1583
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
> Assignee: stack
> Fix For: 0.20.0
>
>
> Starting and stopping a loaded large cluster is way too flakey and takes too
> long. This is 0.19.x but same issues apply to TRUNK I'd say.
> At pset with our > 100 nodes carrying 6k regions:
> + shutdown takes way too long.... maybe ten minutes or so. We compact
> regions inline with shutdown. We should just go down. It doesn't seem like
> all regionservers go down everytime either.
> + startup is a mess with our assigning out regions an rebalancing at same
> time. By time that the compactions on open run, it can be near an hour
> before whole thing settles down and becomes useable
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