| Autor: |
Alice X. Zheng, Lianghong Xu, William Yang Wang, Elie Krevat, Gregory R. Ganger, Spencer Whitman, Raja R. Sambasivan, Michael Stroucken |
| Rok vydání: |
2010 |
| Předmět: |
|
| DOI: |
10.21236/ada528600 |
| Popis: |
The causes of performance changes in a distributed system often elude even its developers. This paper develops a new technique for gaining insight into such changes: comparing system behaviours from two executions (e.g., of two system versions or time periods). Building on end-to-end request flow tracing within and across components, algorithms are described for identifying and ranking changes in the flow and/or timing of request processing. The implementation of these algorithms in a tool called Spectroscope is described and evaluated. Five case studies are presented of using Spectroscope to diagnose performance changes in a distributed storage system caused by code changes and configuration modifications, demonstrating the value and efficacy of comparing system behaviours. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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