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  1. Hadoop Map/Reduce
  2. MAPREDUCE-598

Streaming: better conrol over input splits

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: contrib/streaming
    • Labels:
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      Description

      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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              • Assignee:
                Unassigned
                Reporter:
                arkady arkady borkovsky
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                • Created:
                  Updated:
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