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Computer Science @ Rochester
Monday, November 15, 2004
11:00 AM
CSB 209
Prashant Shenoy
U. Massachusetts
Dynamic Resource Management in Internet Data Centers
Outages of Internet applications have become more frequent as the number of Internet users has continued to grow in a near-exponential fashion. A common reason for such outages is Internet flash crowds---a sudden and unexpected increase in the workload seen by an application due to an external event.

In this talk, I will discuss techniques that can be employed by Internet data centers to reduce outages due to dynamic workload variations and flash crowds. Such data centers will need to employ (i) workload monitoring techniques to predict future workloads and identify workload spikes, and (ii) dynamic resource management techniques to quickly react to workload increases by allocating additional capacity (servers) to overloaded applications. The design of such techniques is complicated by the multi-tiered nature of Internet applications. I will present some recent techniques that we have developed for workload prediction and dynamic capacity provisioning in data centers running multi-tiered Internet applications. I will describe our implementation of a prototype data center in Linux and present results of our experimental evaluation.