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From "Phabricator (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5274) Filter out the expired store file scanner during the compaction
Date Thu, 26 Jan 2012 23:25:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13194268#comment-13194268
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Phabricator commented on HBASE-5274:
------------------------------------

mbautin has commented on the revision "[jira] [HBASE-5274] Filter out expired scanners on
compaction as well".

  Lars: please see my response inline.

INLINE COMMENTS
  src/main/java/org/apache/hadoop/hbase/regionserver/Store.java:975 In that case I would have
to make LruBlockCache.getCachedFileNamesForTest public. In addition, this patch makes HBASE-5010
implementation consistent in 89-fb and trunk, and moving the unit test around might create
confusion.

  Please let me know if this is OK to commit.

REVISION DETAIL
  https://reviews.facebook.net/D1473

                
> Filter out the expired store file scanner during the compaction
> ---------------------------------------------------------------
>
>                 Key: HBASE-5274
>                 URL: https://issues.apache.org/jira/browse/HBASE-5274
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Liyin Tang
>            Assignee: Liyin Tang
>         Attachments: D1407.1.patch, D1407.1.patch, D1407.1.patch, D1407.1.patch, D1407.1.patch,
D1473.1.patch
>
>
> During the compaction time, HBase will generate a store scanner which will scan a list
of store files. And it would be more efficient to filer out the expired store file since there
is no need to read any key values from these store files.
> This optimization has been already implemented on 89-fb and this is the building block
for HBASE-5199 as well. It is supposed to be no-ops to compact the expired store files.

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