Workload Propagation - Overload in Bursty Servers

10 years 14 days ago
Workload Propagation - Overload in Bursty Servers
Internet servers are developing into complex but central components in the information infrastructure and are accessed by an ever-increasing and diversified user population. As such, they are susceptible to unpredicted and transient overloads, making highly available, yet cost-effective service a critical challenge. System responsiveness during overload periods is at least as important as system behavior under average, steady state load. Using measurements from a 3-tier e-commerce server, we show how normal and overload conditions propagate through the system hierarchy, i.e., from the front-end server to the back-end database, focusing on CPU, memory, and I/O performance. We find that overload conditions at lower system levels occur not only when the number of users in the system increases, but also during rapid changes in the nature of the work requested by the current users. These observation advocate the development of system mechanisms at the lower levels that can detect overloa...
Qi Zhang, Alma Riska, Erik Riedel
Added 25 Jun 2010
Updated 25 Jun 2010
Type Conference
Year 2005
Where QEST
Authors Qi Zhang, Alma Riska, Erik Riedel
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