Maxim Khutornenko created AURORA-1219:
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Summary: Improve preemptor efficiency
Key: AURORA-1219
URL: https://issues.apache.org/jira/browse/AURORA-1219
Project: Aurora
Issue Type: Task
Components: Scheduler
Reporter: Maxim Khutornenko
While AURORA-1158 makes the preemptor asynchronous and helps scheduling loop
performance, it loses some preemption efficiency due to adapting the original
algorithm to work asynchronously:
- Preemptor repeatedly searches for preemption slots with the same ClusterState
increasing the probability of victim collisions.
- Slave/offer/resource mappings are redundantly recomputed for every pending
task slot search.
- Pending tasks are repeatedly sized up against every slave (as opposed to the
other way around) making internal loop optimizations more expensive (i.e.
pending task count is expected to be << slave count under normal conditions).
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