Simulate Load Incrementally and Adaptively in GridMix3
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Key: MAPREDUCE-2105
URL: https://issues.apache.org/jira/browse/MAPREDUCE-2105
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: contrib/gridmix
Affects Versions: 0.22.0
Reporter: Ranjit Mathew
Tasks launched by GridMix3 should incrementally and adaptively simulate load
(I/O, CPU, memory, etc.) rather than doing
everything upfront and then sleeping. This helps in evening out the load when
fine-grained information from the original
Task is not available and greater accuracy when it is.
By "incremental" I mean having several iterations corresponding to appropriate
phases/time-slices. By "adaptive" I mean
taking the existing load into account before inflicting additional load to meet
a target load (we are unlikely to achieve
100% fidelity as we overshoot or undershoot with each iteration).
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