Maxim Khutornenko created AURORA-263:
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             Summary: Support a min guaranteed task history retention period
                 Key: AURORA-263
                 URL: https://issues.apache.org/jira/browse/AURORA-263
             Project: Aurora
          Issue Type: Task
          Components: Scheduler
            Reporter: Maxim Khutornenko


Task history currently does not deliver any retention guarantees beyond a max 
of 100 tasks per job over at most 2 days (whichever comes first). This makes 
any immediate event processing (i.e. SLA monitoring) impossible under heavy 
turn over. 

Have the HistoryPrunner support a min configurable retention period (e.g. 2 
minutes) to mitigate the above problem. The risk of overloading mem store is 
minimal due to throttling of flapping tasks.   



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