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  1. Hadoop HDFS
  2. HDFS-2080

Speed up DFS read path by lessening checksum overhead

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 0.23.0
    • 0.23.1
    • hdfs-client, performance
    • None
    • Reviewed

    Description

      I've developed a series of patches that speeds up the HDFS read path by a factor of about 2.5x (~300M/sec to ~800M/sec for localhost reading from buffer cache) and also will make it easier to allow for advanced users (eg hbase) to skip a buffer copy.

      Attachments

        1. hdfs-2080.txt
          134 kB
          Todd Lipcon
        2. hdfs-2080.txt
          142 kB
          Todd Lipcon

        Issue Links

          incorporates

          New Feature - A new feature of the product, which has yet to be developed. HADOOP-7443 Add CRC32C as another DataChecksum implementation

          • Major - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. HADOOP-7444 Add Checksum API to verify and calculate checksums "in bulk"

          • Major - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. HADOOP-7445 Implement bulk checksum verification using efficient native code

          • Major - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. HADOOP-7446 Implement CRC32C native code using SSE4.2 instructions

          • Major - Major loss of function.
          • Closed
          relates to

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-3528 Use native CRC32 in DFS write path

          • Major - Major loss of function.
          • Closed
          There are no Sub-Tasks for this issue.

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              tlipcon Todd Lipcon
              tlipcon Todd Lipcon
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              Dates

                Created:
                Updated:
                Resolved: