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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2768) DFSIO write performance benchmark shows a regression
Date Mon, 04 Feb 2008 07:27:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12565283#action_12565283
] 

Hadoop QA commented on HADOOP-2768:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12374659/perf2.patch
against trunk revision 616796.

    @author +1.  The patch does not contain any @author tags.

    javadoc +1.  The javadoc tool did not generate any warning messages.

    javac +1.  The applied patch does not generate any new javac compiler warnings.

    release audit +1.  The applied patch does not generate any new release audit warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

    core tests -1.  The patch failed core unit tests.

    contrib tests +1.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1735/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1735/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1735/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/1735/console

This message is automatically generated.

> DFSIO write performance benchmark shows a regression
> ----------------------------------------------------
>
>                 Key: HADOOP-2768
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2768
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.16.0
>            Reporter: Mukund Madhugiri
>            Assignee: dhruba borthakur
>            Priority: Blocker
>             Fix For: 0.16.0
>
>         Attachments: perf.patch, perf.patch, perf1.patch, perf2.patch
>
>
> We are seeing a performance regression in DFSIO write benchmark, possibly due to Hadoop-1707.

> Here is the data:
> - Aggregate cluster throughput went from 0.30G to 0.14G with 39 concurrent clients, on
20 nodes
> - Aggregate cluster throughput went from 1.15G to 0.85G with 39 concurrent clients, on
100 nodes

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