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Posted to mapreduce-dev@hadoop.apache.org by "Allen Wittenauer (JIRA)" <ji...@apache.org> on 2014/07/17 19:15:05 UTC
[jira] [Resolved] (MAPREDUCE-316) Splittability of input should be
controllable by application
[ https://issues.apache.org/jira/browse/MAPREDUCE-316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Allen Wittenauer resolved MAPREDUCE-316.
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Resolution: Won't Fix
Closing this as won't fix. As was pointed out, there are other ways.
> Splittability of input should be controllable by application
> ------------------------------------------------------------
>
> Key: MAPREDUCE-316
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-316
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Environment: ALL
> Reporter: Milind Bhandarkar
> Assignee: Senthil Subramanian
> Attachments: HADOOP-1441_1.patch
>
>
> Currently, isSplittable method of FileInputFormat always returns true. For some applications, it becomes necessary that the map task process entire file, rather than a block. Therefore, splittability of input (i.e. block-level split vs file-level-split) should be controllable by user via a configuration variable. The default could be block-level split, as is.
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