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Posted to common-dev@hadoop.apache.org by "Senthil Subramanian (JIRA)" <ji...@apache.org> on 2007/06/19 02:02:26 UTC

[jira] Updated: (HADOOP-1441) Splittability of input should be controllable by application

     [ https://issues.apache.org/jira/browse/HADOOP-1441?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Senthil Subramanian updated HADOOP-1441:
----------------------------------------

    Attachment: HADOOP-1441_1.patch

Added a configuration variable mapred.input.issplitable (default: true) which can be used to tell the framework not to split input files even if the underlying InputFormat is splittable.

> Splittability of input should be controllable by application
> ------------------------------------------------------------
>
>                 Key: HADOOP-1441
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1441
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.12.3
>         Environment: ALL
>            Reporter: Milind Bhandarkar
>            Assignee: Milind Bhandarkar
>             Fix For: 0.14.0
>
>         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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