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https://issues.apache.org/jira/browse/ACCUMULO-3684?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Elser updated ACCUMULO-3684:
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Fix Version/s: (was: 1.7.0)
1.7.1
1.8.0
> balance going too slow
> ----------------------
>
> Key: ACCUMULO-3684
> URL: https://issues.apache.org/jira/browse/ACCUMULO-3684
> Project: Accumulo
> Issue Type: Improvement
> Components: master
> Environment: large test cluster cluster, hadoop 2, accumulo 1.6.2
> Reporter: Eric Newton
> Assignee: Eric Newton
> Fix For: 1.6.3, 1.8.0, 1.7.1
>
>
> While testing a new balancer on a large cluster, performing a large number of
> migrations appears to have been going slowly (20 minutes to migrate 10K
> tablets). Since this balancer requires several rounds, the cluster was in
> transition for couple of hours.
> The master queues requests for tablet servers, and then pushes them out in a
> "flush". Presently, it will not queue more than 5000 requests *for the entire
> cluster* so as to not overwhelm the tservers. But if the cluster has hundreds
> of servers, they would not be overwhelmed anyhow.
> Perhaps we should remove the pause after any intermediary flush.
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