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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10935) support snapshot policy where flush memstore can be skipped to prevent production cluster freeze
Date Fri, 30 May 2014 16:17:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14013894#comment-14013894

Hadoop QA commented on HBASE-10935:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .
  ATTACHMENT ID: 12647616

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

    {color:red}-1 javadoc{color}.  The javadoc tool appears to have generated 1 warning messages.

    {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 site{color}.  The mvn site goal succeeds with this patch.

     {color:red}-1 core tests{color}.  The patch failed these unit tests:

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/9652//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9652//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9652//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9652//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9652//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9652//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9652//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9652//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9652//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/9652//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/9652//console

This message is automatically generated.

> support snapshot policy where flush memstore can be skipped to prevent production cluster
> ------------------------------------------------------------------------------------------------
>                 Key: HBASE-10935
>                 URL: https://issues.apache.org/jira/browse/HBASE-10935
>             Project: HBase
>          Issue Type: New Feature
>          Components: shell, snapshots
>    Affects Versions: 0.94.7, 0.94.18
>            Reporter: Tianying Chang
>            Assignee: Tianying Chang
>            Priority: Minor
>             Fix For: 0.94.7, 0.99.0, 0.94.20
>         Attachments: HBASE-10935-0.94-v1.patch, HBASE-10935-0.98-v1.patch, HBASE-10935-trunk-v1.patch,
hbase-10935-94.patch, hbase-10935-trunk.patch
> We are using snapshot feature to do HBase disaster recovery. We will do snapshot in our
production cluster periodically. The current flush snapshot policy require all regions of
the table to coordinate to prevent write and do flush at the same time. Since we use WALPlayer
to complete the data that is not in the snapshot HFile, we don't need the snapshot to do coordinated
flush. The snapshot just recored all the HFile that are already there. 
> I added the parameter in the HBase shell. So people can choose to use the NoFlush snapshot
when they need, like below. Otherwise, the default flush snpahot support is not impacted.

> >snaphot 'TestTable', 'TestSnapshot', 'skipFlush'

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