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  1. Hadoop HDFS
  2. HDFS-10702

Add a Client API and Proxy Provider to enable stale read from Standby

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Details

    • New Feature
    • Status: Open
    • Minor
    • Resolution: Unresolved
    • None
    • None
    • None
    • None

    Description

      Currently, clients must always talk to the active NameNode when performing any metadata operation, which means active NameNode could be a bottleneck for scalability. One way to solve this problem is to send read-only operations to Standby NameNode. The disadvantage is that it might be a stale read.

      Here, I'm thinking of adding a Client API to enable/disable stale read from Standby which gives Client the power to set the staleness restriction.

      Attachments

        1. HDFS-10702.001.patch
          73 kB
          Jiayi Zhou
        2. HDFS-10702.002.patch
          73 kB
          Jiayi Zhou
        3. HDFS-10702.003.patch
          71 kB
          Jiayi Zhou
        4. HDFS-10702.004.patch
          74 kB
          Jiayi Zhou
        5. HDFS-10702.005.patch
          74 kB
          Jiayi Zhou
        6. HDFS-10702.006.patch
          70 kB
          Sean Mackrory
        7. HDFS-10702.007.patch
          73 kB
          Sean Mackrory
        8. HDFS-10702.008.patch
          72 kB
          Sean Mackrory
        9. StaleReadfromStandbyNN.pdf
          131 kB
          Jiayi Zhou

        Issue Links

          depends upon

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-10519 Add a configuration option to enable in-progress edit log tailing

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

          Improvement - An improvement or enhancement to an existing feature or task. HDFS-8940 Support for large-scale multi-tenant inotify service

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

          New Feature - A new feature of the product, which has yet to be developed. HDFS-12943 Consistent Reads from Standby Node

          • Major - Major loss of function.
          • Resolved

          Activity

            People

              mackrorysd Sean Mackrory
              clouderajiayi Jiayi Zhou
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              Dates

                Created:
                Updated: