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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8541) implement flush-into-stripes in stripe compactions
Date Mon, 28 Oct 2013 22:56:33 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13807442#comment-13807442
] 

Hadoop QA commented on HBASE-8541:
----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12610684/HBASE-8541-latest-with-dependencies.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 25 new or modified
tests.

    {color:green}+1 hadoop1.0{color}.  The patch compiles against the hadoop 1.0 profile.

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

    {color:red}-1 javadoc{color}.  The javadoc tool appears to have generated 8 warning messages.

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

    {color:red}-1 findbugs{color}.  The patch appears to introduce 5 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:red}-1 site{color}.  The patch appears to cause mvn site goal to fail.

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

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/7651//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7651//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7651//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7651//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7651//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7651//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7651//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7651//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7651//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-thrift.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7651//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/7651//console

This message is automatically generated.

> implement flush-into-stripes in stripe compactions
> --------------------------------------------------
>
>                 Key: HBASE-8541
>                 URL: https://issues.apache.org/jira/browse/HBASE-8541
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>         Attachments: HBASE-8541-latest-with-dependencies.patch, HBASE-8541-latest-with-dependencies.patch,
HBASE-8541-latest-with-dependencies.patch, HBASE-8541-latest-with-dependencies.patch, HBASE-8541-v0.patch,
HBASE-8541-v1.patch, HBASE-8541-v2.patch, HBASE-8541-v3.patch
>
>
> Flush will be able to flush into multiple files under this design, avoiding L0 I/O amplification.
> I have the patch which is missing just one feature - support for concurrent flushes and
stripe changes. This can be done via extensive try-locking of stripe changes and flushes,
or advisory flags without blocking flushes, dumping conflicting flushes into L0 in case of
(very rare) collisions. For file loading for the latter, a set-cover-like problem needs to
be solved to determine optimal stripes. That will also address Jimmy's concern of getting
rid of metadata, btw. However currently I don't have time for that. I plan to attach the try-locking
patch first, but this won't happen for a couple weeks probably and should not block main reviews.
Hopefully this will be added on top of main reviews.



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