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  1. Hadoop Map/Reduce
  2. MAPREDUCE-5225

SplitSampler in mapreduce.lib should use a SPLIT_STEP to jump around splits

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Details

    • Bug
    • Status: Patch Available
    • Major
    • Resolution: Unresolved
    • None
    • None
    • None

    Description

      Now, SplitSampler only samples the first maxSplitsSampled splits, caused by MAPREDUCE-1820. However, jumping around all splits is in general preferable than the first N splits.

      Attachments

        1. MAPREDUCE-5225.1.patch
          3 kB
          Zhijie Shen

        Issue Links

          relates to

          Sub-task - The sub-task of the issue MAPREDUCE-5157 Sort in hadoop-1 examples is not binary compatible with hadoop-2 mapred.lib

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MAPREDUCE-1820 InputSampler does not create a deep copy of the key object when creating a sample, which causes problems with some formats like SequenceFile<Text,Text>

          • Major - Major loss of function.
          • Closed

          Activity

            People

              zjshen Zhijie Shen
              zjshen Zhijie Shen
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              Dates

                Created:
                Updated: