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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5274) Add Tracing to HDFS
Date Thu, 17 Apr 2014 03:04:20 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13972253#comment-13972253

Hadoop QA commented on HDFS-5274:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  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 4 new or modified
test files.

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

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {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:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-common-project/hadoop-common


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

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/6680//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/6680//console

This message is automatically generated.

> Add Tracing to HDFS
> -------------------
>                 Key: HDFS-5274
>                 URL: https://issues.apache.org/jira/browse/HDFS-5274
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: datanode, namenode
>    Affects Versions: 2.1.1-beta
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>         Attachments: 3node_get_200mb.png, 3node_put_200mb.png, 3node_put_200mb.png, HDFS-5274-0.patch,
HDFS-5274-1.patch, HDFS-5274-10.patch, HDFS-5274-11.txt, HDFS-5274-12.patch, HDFS-5274-13.patch,
HDFS-5274-14.patch, HDFS-5274-15.patch, HDFS-5274-16.patch, HDFS-5274-2.patch, HDFS-5274-3.patch,
HDFS-5274-4.patch, HDFS-5274-5.patch, HDFS-5274-6.patch, HDFS-5274-7.patch, HDFS-5274-8.patch,
HDFS-5274-8.patch, HDFS-5274-9.patch, Zipkin   Trace a06e941b0172ec73.png, Zipkin   Trace
d0f0d66b8a258a69.png, ss-5274v8-get.png, ss-5274v8-put.png
> Since Google's Dapper paper has shown the benefits of tracing for a large distributed
system, it seems like a good time to add tracing to HDFS.  HBase has added tracing using HTrace.
 I propose that the same can be done within HDFS.

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