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From "Amareshwari Sriramadasu (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-598) Streaming: better conrol over input splits
Date Mon, 12 Jul 2010 11:25:50 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-598?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Amareshwari Sriramadasu updated MAPREDUCE-598:

    Issue Type: Improvement  (was: Bug)

> Streaming: better conrol over input splits
> ------------------------------------------
>                 Key: MAPREDUCE-598
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-598
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: contrib/streaming
>            Reporter: arkady borkovsky
> In steaming, the map command usually expect to receive it's input uninterpreted -- just
as it is stored in DFS.
> However, the split (the beginning and the end of the portion of data that goes to a single
map task) is often important and is not "any line break".
> Often the input consists of multi-line docments -- e.g. in XML.
> There should be a way to specify a pattern that separates logical records.
> Existing "Streaming XML record reader" kind of provides this functionality.  However,
it is accepted that "Streaming XML" is a hack and needs to be replaced 

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