Uploaded image for project: 'Hadoop HDFS'
  1. Hadoop HDFS
  2. HDFS-6581 Write to single replica in memory
  3. HDFS-6934

Move checksum computation off the hot path when writing to RAM disk

    XMLWordPrintableJSON

Details

    • Sub-task
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 2.6.0
    • datanode, hdfs-client
    • None
    • Reviewed

    Description

      Since local RAM is considered reliable we can avoid writing checksums on the hot path when replicas are being written to a local RAM disk.

      The checksum can be computed by the lazy writer when moving replicas to disk.

      Attachments

        1. HDFS-6934-branch-2.6.5.patch
          119 kB
          Chris Nauroth
        2. HDFS-6934.5.patch
          119 kB
          Chris Nauroth
        3. HDFS-6934.4.patch
          118 kB
          Chris Nauroth
        4. HDFS-6934.3.patch
          85 kB
          Chris Nauroth
        5. h6934_20141005.patch
          50 kB
          Tsz-wo Sze
        6. h6934_20141003b.patch
          29 kB
          Tsz-wo Sze

        Activity

          People

            cnauroth Chris Nauroth
            arp Arpit Agarwal
            Votes:
            0 Vote for this issue
            Watchers:
            7 Start watching this issue

            Dates

              Created:
              Updated:
              Resolved: