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https://issues.apache.org/jira/browse/HBASE-12957?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14307506#comment-14307506
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Andrew Purtell edited comment on HBASE-12957 at 2/5/15 4:31 PM:
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I think this should be in 0.98 to keep the delta between there and branch-1
small, will apply there shortly, but I don't see why we are not using a Get -
the patch sets up Scan as an equivalent. I'm not a big fan of the change. We
can improve this on another issue.
was (Author: apurtell):
I think this should be in 0.98 to keep the delta between there and branch-1
small, will apply there shortly, but I don't see why we are not using a Get
instead of as the patch has Scan set up an equivalent. I'm not a big fan of the
change. We can improve this on another issue.
> region_mover#isSuccessfulScan may be extremely slow on region with lots of
> expired data
> ---------------------------------------------------------------------------------------
>
> Key: HBASE-12957
> URL: https://issues.apache.org/jira/browse/HBASE-12957
> Project: HBase
> Issue Type: Improvement
> Components: scripts
> Reporter: hongyu bi
> Assignee: hongyu bi
> Priority: Minor
> Fix For: 2.0.0, 1.1.0
>
> Attachments: HBASE-12957-v0.patch
>
>
> region_mover will call isSuccessfulScan when region has moved to make sure
> it's healthy, however , if the moved region has lots of expired data
> region_mover#isSuccessfulScan will take a long time to finish ,that may even
> exceed "lease timeout".So I made isSuccessfulScan a get-like scan to achieve
> faster response in that case.
> workaround:before graceful_stop/rolling_restart ，call major_compact on the
> table with small TTL
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