hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7763) Compactions not sorting based on size anymore.
Date Wed, 06 Feb 2013 17:21:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13572592#comment-13572592
] 

Sergey Shelukhin commented on HBASE-7763:
-----------------------------------------

I am reading the patch... meanwhile, one consideration that I somehow forgot when reviewing
the original is that you cannot select non-contiguous sequence of files (by seqNum) for compaction
currently, given that during reads the preference of which file to read from is established
by file seqNums (KeyValueHeap::KVScannerComparator::compare). So if selection is re-sorted
someone still needs to ensure it's contiguous.
                
> Compactions not sorting based on size anymore.
> ----------------------------------------------
>
>                 Key: HBASE-7763
>                 URL: https://issues.apache.org/jira/browse/HBASE-7763
>             Project: HBase
>          Issue Type: Bug
>          Components: Compaction
>    Affects Versions: 0.96.0, 0.94.4
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>            Priority: Critical
>             Fix For: 0.96.0, 0.94.6
>
>         Attachments: HBASE-7763-trunk-TESTING.patch, HBASE-7763-trunk-TESTING.patch,
HBASE-7763-trunk-TESTING.patch
>
>
> Currently compaction selection is not sorting based on size.  This causes selection to
choose larger files to re-write than are needed when bulk loads are involved.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message