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Posted to issues@spark.apache.org by "Reynold Xin (JIRA)" <ji...@apache.org> on 2014/11/09 06:05:34 UTC

[jira] [Created] (SPARK-4307) Initialize FileDescriptor lazily in FileRegion

Reynold Xin created SPARK-4307:
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             Summary: Initialize FileDescriptor lazily in FileRegion
                 Key: SPARK-4307
                 URL: https://issues.apache.org/jira/browse/SPARK-4307
             Project: Spark
          Issue Type: Improvement
          Components: Shuffle
            Reporter: Reynold Xin
            Assignee: Reynold Xin


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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