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ISPASS
2006
IEEE

Workload sanitation for performance evaluation

14 years 5 months ago
Workload sanitation for performance evaluation
The performance of computer systems depends, among other things, on the workload. Performance evaluations are therefore often done using logs of workloads on current productions systems, under the assumption that such real workloads are representative and reliable; likewise, workload modeling is typically based on real workloads. We show, however, that real workloads may also contain anomalies that make them non-representative and unreliable. This is a special case of multi-class workloads, where one class is the “real” workload which we wish to use in the evaluation, and the other class contaminates the log with “bogus” data. We provide several examples of this situation, including a previously unrecognized type of anomaly we call “workload flurries”: surges of activity with a repetitive nature, caused by a single user, that dominate the workload for a relatively short period. Using a workload with such anomalies in effect emphasizes rare and unique events (e.g. occurrin...
Dror G. Feitelson, Dan Tsafrir
Added 12 Jun 2010
Updated 12 Jun 2010
Type Conference
Year 2006
Where ISPASS
Authors Dror G. Feitelson, Dan Tsafrir
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