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Date: Thu, 12 Jan 2012 01:10:39 +0000 (UTC)
From: "Zhihong Yu (Updated) (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (HBASE-5033) Opening/Closing store in parallel to
 reduce region open/close time
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     [ https://issues.apache.org/jira/browse/HBASE-5033?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zhihong Yu updated HBASE-5033:
------------------------------

    Release Note: 
"hbase.hstore.open.and.close.threads.max" is introduced to control the number of threads for opening/closing Store and store files.

    
> 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
>             Fix For: 0.94.0
>
>         Attachments: 5033-trunk.txt, 5033.txt, D933.1.patch, D933.2.patch, D933.3.patch, D933.4.patch, D933.5.patch, HBASE-5033.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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