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https://issues.apache.org/jira/browse/HBASE-5033?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13181158#comment-13181158
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Lars Hofhansl commented on HBASE-5033:
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It looks like you need to rebase the patch to latest trunk.
Also do you have any performance numbers as well as some guidelines about to
size these threads pools?
We'll get the exact current behavior by setting the number of threads to 1,
correct? Should that be the default instead, and folks would need to explicitly
enable this? (or are you confident that we won't see any degradation in overall
throughput and fairness?)
I love this feature... :)
> Opening/Closing store in parallel to reduce region open/close time
> ------------------------------------------------------------------
>
> Key: HBASE-5033
> URL: https://issues.apache.org/jira/browse/HBASE-5033
> Project: HBase
> Issue Type: Improvement
> Reporter: Liyin Tang
> Assignee: Liyin Tang
> Attachments: D933.1.patch, D933.2.patch, D933.3.patch, D933.4.patch,
> D933.5.patch, HBASE-5033-apach-trunk.patch
>
>
> Region servers are opening/closing each store and each store file for every
> store in sequential fashion, which may cause inefficiency to open/close
> regions.
> So this diff is to open/close each store in parallel in order to reduce
> region open/close time. Also it would help to reduce the cluster restart time.
> 1) Opening each store in parallel
> 2) Loading each store file for every store in parallel
> 3) Closing each store in parallel
> 4) Closing each store file for every store in parallel.
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