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  1. Hadoop Common
  2. HADOOP-525

Need raw comparators for hadoop record types

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 0.6.0
    • 0.10.0
    • record
    • None

    Description

      Raw comparators are not generated for types that are generated with the Hadoop record framework. This could have a substantial performance impact when using hadoop record generated types in Map/Reduce. The record i/o framework should auto-generate raw comparators for types.

      Comparison for hadoop record i/o types is defined to be member wise comparison of objects. A possible implementation could only deserialize one member from each object at a time, compare them and either return or move on to the next member if the values are equal.

      Attachments

        1. raw-comparators.patch
          58 kB
          Milind Barve
        2. TypeBuilder.java
          32 kB
          Trevor Strohman
        3. TypeBuilder-support.tar
          30 kB
          Trevor Strohman
        4. WordCountType.java
          18 kB
          Trevor Strohman

        Activity

          People

            milindb Milind Barve
            sameerp Sameer Paranjpye
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            Dates

              Created:
              Updated:
              Resolved: