[jira] [Commented] (TEZ-1993) Implement a pluggable InputSizeEstimator for grouping fairly

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TEZ-1993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14481003#comment-14481003 ] 

Hadoop QA commented on TEZ-1993:
--------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment
  http://issues.apache.org/jira/secure/attachment/12723302/TEZ-1993.3.patch
  against master revision 5e2a55f.

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 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 findbugs{color}.  The patch does not introduce any new Findbugs (version 2.0.3) warnings.

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

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

Test results: https://builds.apache.org/job/PreCommit-TEZ-Build/394//testReport/
Console output: https://builds.apache.org/job/PreCommit-TEZ-Build/394//console

This message is automatically generated.

> Implement a pluggable InputSizeEstimator for grouping fairly
> ------------------------------------------------------------
>
>                 Key: TEZ-1993
>                 URL: https://issues.apache.org/jira/browse/TEZ-1993
>             Project: Apache Tez
>          Issue Type: Bug
>    Affects Versions: 0.7.0
>            Reporter: Gopal V
>            Assignee: Gopal V
>         Attachments: TEZ-1993.1.patch, TEZ-1993.2.patch, TEZ-1993.3.patch
>
>
> Split grouping is currently done using a file size measurement which is the exact size of the split as it stays at rest on HDFS.
> This is not valid for columnar formats and especially suffers from highly compressible data skews.



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