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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7365) Safer table creation and deletion using .tmp dir
Date Tue, 05 Feb 2013 06:48:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13571093#comment-13571093
] 

Hadoop QA commented on HBASE-7365:
----------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12567956/7365-v4.patch
  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
tests.

    {color:green}+1 hadoop2.0{color}.  The patch compiles against the hadoop 2.0 profile.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines longer than 100

    {color:green}+1 core tests{color}.  The patch passed unit tests in .

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/4327//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4327//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4327//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4327//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4327//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4327//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/4327//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/4327//console

This message is automatically generated.
                
> Safer table creation and deletion using .tmp dir
> ------------------------------------------------
>
>                 Key: HBASE-7365
>                 URL: https://issues.apache.org/jira/browse/HBASE-7365
>             Project: HBase
>          Issue Type: Improvement
>          Components: master
>            Reporter: Matteo Bertozzi
>            Assignee: Matteo Bertozzi
>             Fix For: 0.96.0
>
>         Attachments: 7365-v4.patch, HBASE-7365-v0.patch, HBASE-7365-v1.patch, HBASE-7365-v2.patch,
HBASE-7365-v3.patch
>
>
> Currently tables are created in the root directory, and the removal works on the root
directory.
> Change the code to use a /hbase/.tmp directory to make the creation and removal a bit
safer
> Table Creation steps
>  * Create the table descriptor (table folder, in /hbase/.tmp/)
>  * Create the table regions (always in temp)
>  * Move the table from temp to the root folder
>  * Add the regions to meta
>  * Trigger assignment
>  * Set enable flag in ZooKeeper
> Table Deletion steps
>  * Wait for regions in transition
>  * Remove regions from meta (use bulk delete)
>  * Move the table in /hbase/.tmp
>  * Remove the table from the descriptor cache
>  * Remove table from zookeeper
>  * Archive the table
> The main changes in the current code are:
>  * Writing to /hbase/.tmp and then rename
>  * using bulk delete in DeletionTableHandler

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