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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-14575) Relax region read lock for compactions
Date Wed, 02 Dec 2015 18:34:11 GMT

     [ https://issues.apache.org/jira/browse/HBASE-14575?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ted Yu updated HBASE-14575:
---------------------------
       Resolution: Fixed
     Hadoop Flags: Reviewed
    Fix Version/s: 1.3.0
                   2.0.0
           Status: Resolved  (was: Patch Available)

Unit test suite results are quite clean.

Thanks for the reviews.

> Relax region read lock for compactions
> --------------------------------------
>
>                 Key: HBASE-14575
>                 URL: https://issues.apache.org/jira/browse/HBASE-14575
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Compaction, regionserver
>            Reporter: Nick Dimiduk
>            Assignee: Nick Dimiduk
>             Fix For: 2.0.0, 1.3.0
>
>         Attachments: 14575-test-case.patch, 14575-v1.patch, 14575-v2.patch, 14575-v3.patch,
14575-v4.patch, 14575-v5.patch, 14575-v6.txt, 14575-v6.txt, 14575-v6.txt, 14575-v7.txt, 14575.v00.patch
>
>
> Per [~devaraj]'s idea on parent issue, let's see if we can reduce the scope of critical
section under which compactions hold the region read lock.
> Here is summary from parent issue:
> Another idea is we can reduce the scope of when the read lock is held during compaction.
In theory the compactor only needs a region read lock while deciding what files to compact
and at the time of committing the compaction. We're protected from the case of region close
events because compactions are checking (every 10k bytes written) if the store has been closed
in order to abort in such a case.



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