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Date: Fri, 19 Sep 2014 09:22:34 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-11644) External MOB compaction tools
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    [ https://issues.apache.org/jira/browse/HBASE-11644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14140231#comment-14140231 ] 

Hadoop QA commented on HBASE-11644:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12669957/HBASE-11644-Sep-19.diff
  against trunk revision .
  ATTACHMENT ID: 12669957

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 19 new or modified tests.

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/10992//console

This message is automatically generated.

> External MOB compaction tools
> -----------------------------
>
>                 Key: HBASE-11644
>                 URL: https://issues.apache.org/jira/browse/HBASE-11644
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Compaction, master
>    Affects Versions: hbase-11339
>            Reporter: Jingcheng Du
>            Assignee: Jingcheng Du
>             Fix For: hbase-11339
>
>         Attachments: HBASE-11644-Sep-15.diff, HBASE-11644-Sep-16.diff, HBASE-11644-Sep-16.diff, HBASE-11644-Sep-18.diff, HBASE-11644-Sep-19.diff, HBASE-11644.diff, HBASE-11646-0918-bad.patch
>
>
> From the design doc,  mob files are not involved in the normal HBase compaction process.  This means deleted mobs would still take up space and that we never really merge mob files that accrue over time.   Currently, MOBs depend on two external tools:
> 1) A TTL cleaner that removes mobs that have passed their TTL or exceeded minVersions.
> 2) A 'sweep tool' cleaner that remove mobs that have had their references deleted and merges small files into larger ones.  
> Today the tools are triggered by admins.  The longer term goal would be to integrate them into hbase such that by default mobs are cleaned.  The tools will be preserved however so that advanced admins can disable automatic cleanups and manually trigger these compaction like operaitons.  #1 would likely be a chore in the master while #2 requires some design work to integrate into hbase.


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