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Posted to dev@aurora.apache.org by "Bill Farner (JIRA)" <ji...@apache.org> on 2014/01/25 05:13:39 UTC

[jira] [Created] (AURORA-117) Scheduler performance issues with very large jobs

Bill Farner created AURORA-117:
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             Summary: Scheduler performance issues with very large jobs
                 Key: AURORA-117
                 URL: https://issues.apache.org/jira/browse/AURORA-117
             Project: Aurora
          Issue Type: Task
          Components: Scheduler
            Reporter: Bill Farner


The scheduler tends to have performance issues when scheduling very large jobs.  We've observed this with jobs exceeding 2000 instances.  The {{TaskScheduler}} thread tends to consume a large amount of CPU (100%, limited by the global storage lock).  Current hypothesis is that the majority of the time is spent satisfying diversity constraints (rack, machine), which require expensive queries.



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