Hadoop Common
  1. Hadoop Common
  2. HADOOP-5784

The length of the heartbeat cycle should be configurable.

    Details

    • Type: Improvement Improvement
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.21.0
    • Component/s: None
    • Labels:
      None
    • Release Note:
      Hide
      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.

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

        Activity

        Owen O'Malley created issue -
        Amareshwari Sriramadasu made changes -
        Field Original Value New Value
        Assignee Amareshwari Sriramadasu [ amareshwari ]
        Amareshwari Sriramadasu made changes -
        Attachment patch-5784.txt [ 12408937 ]
        Amareshwari Sriramadasu made changes -
        Status Open [ 1 ] Patch Available [ 10002 ]
        Fix Version/s 0.21.0 [ 12313563 ]
        Amareshwari Sriramadasu made changes -
        Status Patch Available [ 10002 ] Open [ 1 ]
        Amareshwari Sriramadasu made changes -
        Attachment patch-5784-1.txt [ 12409148 ]
        Amareshwari Sriramadasu made changes -
        Status Open [ 1 ] Patch Available [ 10002 ]
        Devaraj Das made changes -
        Status Patch Available [ 10002 ] Resolved [ 5 ]
        Resolution Fixed [ 1 ]
        Owen O'Malley made changes -
        Component/s mapred [ 12310690 ]
        Arun C Murthy made changes -
        Attachment HADOOP-5784_yhadoop20.patch [ 12420257 ]
        Hemanth Yamijala made changes -
        Release Note 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.
        Tom White made changes -
        Status Resolved [ 5 ] Closed [ 6 ]

          People

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

            Dates

            • Created:
              Updated:
              Resolved:

              Development