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  1. Hadoop HDFS
  2. HDFS-3228

Use fadvise in local read path

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Details

    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • hdfs-client, performance
    • None

    Description

      The read path through BlockReaderLocal does not take advantage of readahead or drop-behind in the way that BlockSender does. We could arguably stand to gain even more from hinting about read patterns to the kernel here, so we should add the same mechanisms to BlockReaderLocal.

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          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. HDFS-4697 short-circuit reads do not honor readahead settings

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed
          is related to

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-2744 Extend FSDataInputStream to allow fadvise

          • Major - Major loss of function.
          • Open

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-2465 Add HDFS support for fadvise readahead and drop-behind

          • Major - Major loss of function.
          • Closed

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            People

              henryr Henry Robinson
              henryr Henry Robinson
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              Dates

                Created:
                Updated: