Uploaded image for project: 'Hadoop HDFS'
  1. Hadoop HDFS
  2. HDFS-1520

HDFS 20 append: Lightweight NameNode operation to trigger lease recovery

    Details

    • Type: New Feature
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 0.20-append
    • Fix Version/s: 0.20-append, 0.20.205.0
    • Component/s: namenode
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      Currently HBase uses append to trigger the close of HLog during Hlog split. Append is a very expensive operation, which involves not only NameNode operations but creating a writing pipeline. If one of datanodes on the pipeline has a problem, this recovery may takes minutes. I'd like implement a lightweight NameNode operation to trigger lease recovery and make HBase to use this instead.

        Attachments

        1. HDFS-1520.20-security.1.patch
          20 kB
          Jitendra Nath Pandey
        2. recoverLeaseApache20.patch
          19 kB
          Hairong Kuang

          Issue Links

            Activity

              People

              • Assignee:
                hairong Hairong Kuang
                Reporter:
                hairong Hairong Kuang
              • Votes:
                1 Vote for this issue
                Watchers:
                5 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: