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https://issues.apache.org/jira/browse/HBASE-5033?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13173502#comment-13173502
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Phabricator commented on HBASE-5033:
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Liyin has commented on the revision "[jira][HBASE-5033][[89-fb]]Opening/Closing
store in parallel to reduce region open/close time".
Thanks Lars for the reviewing :)
I just read your comments in the jira and sorry to miss it at first.
I totally agree with you that we should be very careful about over-parallel
and overwhelm the region server and name node too much. So these configuration
parameter really matters.
Also considering we are still processing each message about region open and
region close at one time, we may not get a throughput win too much by
parallelizing the store/store file open and close process.
REVISION DETAIL
https://reviews.facebook.net/D933
> 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
>
>
> 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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