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https://issues.apache.org/jira/browse/HBASE-3019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack resolved HBASE-3019.
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Hadoop Flags: [Reviewed]
Assignee: stack
Fix Version/s: 0.90.0
Resolution: Fixed
Committed. Thanks for review Jon and Ted.
> Make bulk assignment on cluster startup run faster
> --------------------------------------------------
>
> Key: HBASE-3019
> URL: https://issues.apache.org/jira/browse/HBASE-3019
> Project: HBase
> Issue Type: Improvement
> Reporter: stack
> Assignee: stack
> Fix For: 0.90.0
>
> Attachments: bulk-v4.txt, bulk-v7.txt
>
>
> Currently, as of HBASE-3018, we come up with a bulk assignment plan that is
> sorted by server. We then spawn a thread to assign out the regions per
> server so we are assigning in parallel. This works but is still slow enough
> (It looks to be slower than the old assignment where we'd do lumps of N
> regions at a time). We should be able to pass a regionserver all the regions
> to open in one RPC. We need to figure how to keep up zk state while
> regionserver is processing a big lot of regions. This looks a little awkward
> to do since currently open handler just opens region -- there is no notion of
> doing a ping while waiting to run.
> Being able to start the cluster fast is important for those times we take it
> down to do major upgrade; the longer it takes to spin up, the longer our
> 'downtime'.
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