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https://issues.apache.org/jira/browse/HBASE-1583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12724327#action_12724327
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Jonathan Gray commented on HBASE-1583:
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I like your idea, ryan. Next generation of balancing needs to take into
account actual usage that comprises a complex notion of "load" including
memcache, er memstore, usage, block cache usage, and as you say, an additional
factor could be how many other regions from the same table are already assigned
to that regionserver.
> 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
> 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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