Dynamic Provisioning of Multi-tier Internet Applications
Urgaonkar, B.; Shenoy, P.; Chandra, A.; Goyal, P.
Autonomic Computing, 2005. ICAC 2005. Proceedings. Second International Conference on
Volume , Issue , 13-16 June 2005 Page(s):217 - 228
Digital Object Identifier   10.1109/ICAC.2005.27
Summary:Dynamic capacity provisioning is a useful technique for handling the multi-time-scale variations seen in Internet workloads. In this paper, we propose a novel dynamic provisioning technique for multitier Internet applications that employs (i) a flexible queuing model to determine how much resources to allocate to each tier of the application, and (ii) a combination of predictive and reactive methods that determine when to provision these resources, both at large and small time scales. Our experiments on a forty-machine Linux-based hosting platform demonstrate the responsiveness of our technique in handling dynamic workloads. In one scenario where a flash crowd caused the workload of a three-tier application to double, our technique was able to double the application capacity within five minutes, thus maintaining response time targets

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