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  1. Hadoop Common
  2. HADOOP-5784

The length of the heartbeat cycle should be configurable.

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.21.0
    • Component/s: None
    • Labels:
      None
    • Release Note:
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      Introduced a configuration parameter, mapred.heartbeats.in.second, as an expert option, that defines how many heartbeats a jobtracker can process in a second. Administrators can set this to an appropriate value based on cluster size and expected processing time on the jobtracker to achieve a balance between jobtracker scalability and latency of jobs.
      Show
      Introduced a configuration parameter, mapred.heartbeats.in.second, as an expert option, that defines how many heartbeats a jobtracker can process in a second. Administrators can set this to an appropriate value based on cluster size and expected processing time on the jobtracker to achieve a balance between jobtracker scalability and latency of jobs.

      Description

      Currently, the hearbeat cycle is set to (# nodes / 100) in seconds. This can be too long for clusters that need to run low latency jobs. We should make the number of heartbeats that should arrive a second configurable.

        Attachments

        1. patch-5784.txt
          3 kB
          Amareshwari Sriramadasu
        2. patch-5784-1.txt
          6 kB
          Amareshwari Sriramadasu
        3. HADOOP-5784_yhadoop20.patch
          6 kB
          Arun Murthy

          Activity

            People

            • Assignee:
              amareshwari Amareshwari Sriramadasu
              Reporter:
              omalley Owen O'Malley
            • Votes:
              1 Vote for this issue
              Watchers:
              5 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: