[jira] [Commented] (TEZ-2879) While grouping splits, allow an alternate list of preferred locations to be provided per split

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

    [ https://issues.apache.org/jira/browse/TEZ-2879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14972265#comment-14972265 ] 

TezQA commented on TEZ-2879:
----------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment
  http://issues.apache.org/jira/secure/attachment/12768445/TEZ-2879.1.txt
  against master revision 46bc363.

    {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 3.0.1) 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/1246//testReport/
Console output: https://builds.apache.org/job/PreCommit-TEZ-Build/1246//console

This message is automatically generated.

> While grouping splits, allow an alternate list of preferred locations to be provided per split
> ----------------------------------------------------------------------------------------------
>
>                 Key: TEZ-2879
>                 URL: https://issues.apache.org/jira/browse/TEZ-2879
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: Siddharth Seth
>            Assignee: Siddharth Seth
>         Attachments: TEZ-2879.1.txt, TEZ-2879.1.wip.txt
>
>
> Split locations - at least for FileInputSplits - are generally tied to the location on HDFS where the split resides.
> There are situations in which this location is not necessarily the best location to process this split.
> e.g.
> Clusters where compute and storage are separate.
> Systems which cache data - cache affinity is more important.
> Providing an alternate list of preferred locations allows grouping to the preferred locations, instead of always grouping based on the locations specified in the split.



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