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