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  1. Spark
  2. SPARK-4307

Initialize FileDescriptor lazily in FileRegion

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.2.0
    • Component/s: Shuffle
    • Labels:
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    • Target Version/s:

      Description

      We use Netty's DefaultFileRegion to do zero copy send. However, DefaultFileRegion requires a FileDescriptor, which results in a large number of opened files in larger workloads.

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            • Assignee:
              rxin Reynold Xin
              Reporter:
              rxin Reynold Xin
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