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  1. Spark
  2. SPARK-4477

remove numpy from RDDSampler of PySpark

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    Details

    • Type: New Feature
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.8.1, 0.9.1, 1.0.2, 1.1.0, 1.2.0
    • Fix Version/s: 1.2.0
    • Component/s: PySpark
    • Labels:
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      Description

      In RDDSampler, it try use numpy to gain better performance for possion(), but the number of call of random() is only (1+faction) * N in the pure python implementation of possion(), so there is no much performance gain from numpy.

      numpy is not a dependent of pyspark, so it maybe introduce some problem, such as there is no numpy installed in slaves, but only installed master, as reported in xxxx.

      It also complicate the code a lot, so we may should remove numpy from RDDSampler.

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              • Assignee:
                davies Davies Liu
                Reporter:
                davies Davies Liu
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                • Created:
                  Updated:
                  Resolved: