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  1. Hadoop Common
  2. HADOOP-7444

Add Checksum API to verify and calculate checksums "in bulk"

    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.23.0
    • Component/s: None
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      Currently, the various checksum types only provide the capability to calculate the checksum of a range of a byte array. For HDFS-2080, it's advantageous to provide an API that, given a buffer with some number of "checksum chunks", can either calculate or verify the checksums of all of the chunks. For example, given a 4KB buffer and a 512-byte chunk size, it would calculate or verify 8 CRC32s in one call.

      This allows efficient JNI-based checksum implementations since the cost of crossing the JNI boundary is amortized across many computations.

        Attachments

        1. hadoop-7444.txt
          12 kB
          Todd Lipcon
        2. hadoop-7444.txt
          12 kB
          Todd Lipcon
        3. hadoop-7444.txt
          7 kB
          Todd Lipcon

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              • Assignee:
                tlipcon Todd Lipcon
                Reporter:
                tlipcon Todd Lipcon
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                • Created:
                  Updated:
                  Resolved: