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  1. Hadoop YARN
  2. YARN-782

vcores-pcores ratio functions differently from vmem-pmem ratio in misleading way

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 2.0.4-alpha
    • Fix Version/s: 2.1.0-beta
    • Component/s: nodemanager
    • Labels:
      None
    • Target Version/s:
    • Hadoop Flags:
      Reviewed

      Description

      The vcores-pcores ratio functions differently from the vmem-pmem ratio in the sense that the vcores-pcores ratio has an impact on allocations and the vmem-pmem ratio does not.

      If I double my vmem-pmem ratio, the only change that occurs is that my containers, after being scheduled, are less likely to be killed for using too much virtual memory. But if I double my vcore-pcore ratio, my nodes will appear to the ResourceManager to contain double the amount of CPU space, which will affect scheduling decisions.

      The lack of consistency will exacerbate the already difficult problem of resource configuration.

        Attachments

        1. YARN-782.patch
          4 kB
          Sandy Ryza
        2. YARN-782-1.patch
          4 kB
          Sandy Ryza

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            • Assignee:
              sandyr Sandy Ryza
              Reporter:
              sandyr Sandy Ryza
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              Dates

              • Created:
                Updated:
                Resolved: