[
https://issues.apache.org/jira/browse/MAPREDUCE-1423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Zheng Shao updated MAPREDUCE-1423:
----------------------------------
Tags: combinefileinputformat
Resolution: Fixed
Fix Version/s: 0.22.0
Release Note: MAPREDUCE-1423. Improve performance of
CombineFileInputFormat when multiple pools are configured. (Dhruba Borthakur
via zshao)
Hadoop Flags: [Reviewed]
Status: Resolved (was: Patch Available)
Committed. Thanks Dhruba!
> Improve performance of CombineFileInputFormat when multiple pools are
> configured
> --------------------------------------------------------------------------------
>
> Key: MAPREDUCE-1423
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1423
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: client
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Fix For: 0.22.0
>
> Attachments: CombineFileInputFormatPerformance.txt,
> CombineFileInputFormatPerformance.txt
>
>
> I have a map-reduce job that is using CombineFileInputFormat. It has
> configured 10000 pools and 30000 files. The time to create the splits takes
> more than an hour. The reaosn being that CombineFileInputFormat.getSplits()
> converts the same path from String to Path object multiple times, one for
> each instance of a pool. Similarly, it calls Path.toUri(0 multiple times.
> This code can be optimized.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
