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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7725) Add ability to create custom compaction request
Date Wed, 27 Feb 2013 01:17:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7725?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13587832#comment-13587832

Hadoop QA commented on HBASE-7725:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .

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

    {color:green}+1 tests included{color}.  The patch appears to include 3 new or modified

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

Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/4564//console

This message is automatically generated.
> Add ability to create custom compaction request
> -----------------------------------------------
>                 Key: HBASE-7725
>                 URL: https://issues.apache.org/jira/browse/HBASE-7725
>             Project: HBase
>          Issue Type: Bug
>          Components: Compaction, Coprocessors, regionserver
>    Affects Versions: 0.95.0, 0.94.6
>            Reporter: Jesse Yates
>            Assignee: Jesse Yates
>             Fix For: 0.95.0, 0.94.6
>         Attachments: example.java, hbase-7725_0.94-v0.patch, hbase-7725_0.94-v3.patch,
hbase-7725_0.94-v4.patch, hbase-7725-addenum.patch, hbase-7725-addenum-v1.patch, hbase-7725-v0.patch,
hbase-7725-v1.patch, hbase-7725-v3.patch, hbase-7725-v4.patch, hbase-7725-v5.patch, hbase-7725-v6.patch,
hbase-7725_with-attributes-0.94-v0.patch, hbase-7725_with-attributes-0.94-v1.patch
> You can request that a compaction be started, but you can't be sure when that compaction
request completes. This is a simple update to the CompactionRequest interface and the compact-split
thread on the RS that doesn't actually impact the RS exposed interface.
> This is particularly useful for CPs so they can control starting/running a compaction.
> *Update - Better description (3/20/13):* 
> Enable coprocessors to submit custom compaction requests. 
> This compaction request is used (if not null) through the entire compaction process.
If no custom compaction request is submitted (its null - the normal case) then we we build
a new compaction request via the usual mechanisms in the Store. 
> Adding this mechanism is particularly useful when 'special' compactions are desired and
you want to do things like: only change certain files for a particularly requested compaction
or follow a single compaction through the queue.

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