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  1. Hadoop Common
  2. HADOOP-499

Avoid the use of Strings to improve the performance of hadoop streaming

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 0.5.0
    • 0.6.0
    • None
    • None

    Description

      In hadoop streaming, a record is represented as a String for I/O and is encoded as UTF8 for map/reduce. A record has to be converted between String and UTF8 back and forth multiple times and this wastes CPU time.

      Attachments

        1. text_streaming.patch
          31 kB
          Hairong Kuang

        Issue Links

          incorporates

          Improvement - An improvement or enhancement to an existing feature or task. HADOOP-413 streaming: replace class UTF8 with class Text

          • Major - Major loss of function.
          • Closed

          Activity

            People

              hairong Hairong Kuang
              hairong Hairong Kuang
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              Dates

                Created:
                Updated:
                Resolved: