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https://issues.apache.org/jira/browse/HBASE-13316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14376214#comment-14376214
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Elliott Clark commented on HBASE-13316:
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Is there a way to move the warm up call into a thread pool so that bulk assign
doesn't have a blocking call done in serial?
Is there an issue if warm up is running while an open for that region is sent?
Nits:
There are a bunch of * imports. We generally try and stay away from those.
There are javadoc @params that aren't filled out. Either remove them or fill
them out.
> Reduce the downtime on panned moves of regions
> ----------------------------------------------
>
> Key: HBASE-13316
> URL: https://issues.apache.org/jira/browse/HBASE-13316
> Project: HBase
> Issue Type: Improvement
> Components: Balancer
> Affects Versions: 2.0.0, 1.0.1, 1.1.1
> Reporter: Sameet Agarwal
> Assignee: Sameet Agarwal
> Priority: Minor
> Fix For: 2.0.0
>
> Attachments: PlannedFailover.patch
>
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> The current behavior of a region move shuts down a region and then starts is
> up in another regionserver. This causes increased latency and possibly
> timeouts till the new region's cache is fully warmed up. We can make a region
> move less disruptive by warming the cache in the destination region server
> before shutting dow the old region.
>
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