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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2886) Track individual RPC metrics.
Date Thu, 20 Mar 2008 07:30:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12580688#action_12580688
] 

Hadoop QA commented on HADOOP-2886:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12378255/rpcmetrics.patch
against trunk revision 619744.

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

    tests included -1.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no tests are needed for this patch.

    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 passed core unit tests.

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

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2007/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2007/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2007/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2007/console

This message is automatically generated.

> Track individual RPC metrics.
> -----------------------------
>
>                 Key: HADOOP-2886
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2886
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: metrics
>            Reporter: girish vaitheeswaran
>             Fix For: 0.17.0
>
>         Attachments: rpc-metrics.patch, rpc-metrics.patch, rpc-metrics.path, rpcmetrics.patch,
rpcmetrics.patch, rpcmetrics.patch
>
>
> There is currently no mechanism to track performance metrics at the granularity of a
specific RPC. So For e.g. if we wanted to capture average latency for the openFile RPC or
for the createFile RPC the current infrastructure does not support that.
> The implementation involves having a simple HashMap where every new Rpc metric being
added would be inserted into the HashMap. Since there is a mechanism to obtain RPC latencies
already (without the name of the specific RPC), the identification of what RPC is involved
would be done by doing a lookup on the HashMap.

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