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How I learned to Stop Worrying and Love Preemption

How I learned to Stop Worrying and Love Preemption. Best thing about Condor?. The Community Community as Metaphor. Two Questions. How much more room in OSG? How long can jobs (effectively) run?. Not an OSG talk. 3 method for performance analysis. Modeling Difficult in opportunistic pools

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How I learned to Stop Worrying and Love Preemption

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  1. How I learned to Stop Worrying and Love Preemption

  2. Best thing about Condor? The Community Community as Metaphor

  3. Two Questions • How much more room in OSG? • How long can jobs (effectively) run?

  4. Not an OSG talk

  5. 3 method for performance analysis • Modeling • Difficult in opportunistic pools • Simulation • Difficult in opportunistic pools • Measurement

  6. Measurement • Simply submit a ton of jobs • All measurement via user log

  7. User log trick: • +TheSite="$$(GLIDEIN_Site)" • job_ad_information_attrs = TheSite

  8. 028 (4.1.0) 02/17 18:38:03 Job ad information event triggered. • TriggerEventTypeNumber = 1 • EventTypeNumber= 28 • TriggerEventTypeName= "ULOG_EXECUTE" • Proc= 87 • Subproc = 0 • TheSite = "Purdue" • CurrentTime = time() • MyType = "ExecuteEvent"

  9. 76,161 total cpu-hours

  10. Wall clock slowdown

  11. How to fix? • Mix and match • Opportunistic for throughput • Local resources for tail chopping

  12. Summary • Opportunistic cycles are still very useful • Fairness and Throughput can be duals • Opportunistic + dedicated very powerful

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