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From "chunhui shen (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-7672) Merging compaction requests in the queue for same store
Date Sat, 26 Jan 2013 03:57:15 GMT

     [ https://issues.apache.org/jira/browse/HBASE-7672?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

chunhui shen resolved HBASE-7672.

    Resolution: Duplicate

Duplicated as HBASE-5479, move discussion to HBASE-5479
> Merging compaction requests in the queue for same store
> -------------------------------------------------------
>                 Key: HBASE-7672
>                 URL: https://issues.apache.org/jira/browse/HBASE-7672
>             Project: HBase
>          Issue Type: Improvement
>          Components: Compaction
>    Affects Versions: 0.94.4
>            Reporter: chunhui shen
>            Assignee: chunhui shen
>             Fix For: 0.96.0
>         Attachments: HBASE-7672.patch
> With a high write presesure, we could found many compaction requests for same store in
the compaction queue.
> I think we could merge compaction requests for same store to increase compaction efficiency
greately. It is so in 0.90 version because doing compacting files selection only when executing
> e.g.
> {code}
> SmallCompation active count:1,Queue:
> regionName=abctest,90F9AUIPK4YO47W55WS4R8RSKGDFNRYBNB79COYKHNQD9F62G7,1359104485823.f05568c159940b8a72bd84c988388ad3.,
storeName=c1, fileCount=4, fileSize=371.1m (212.0m, 53.0m, 53.0m, 53.0m), priority=15, time=56843340270506608
> regionName=abctest,90F9AUIPK4YO47W55WS4R8RSKGDFNRYBNB79COYKHNQD9F62G7,1359104485823.f05568c159940b8a72bd84c988388ad3.,
storeName=c1, fileCount=4, fileSize=330.4m (171.3m, 53.0m, 53.0m, 53.0m), priority=11, time=56843401092063608
> {code}
> We could merge these two compaction requests

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