Dynamic Provisioning of Multi-tier Internet Applications

  • Authors:
  • Bhuvan Urgaonkar;Abhishek Chandra

  • Affiliations:
  • University of Massachusetts, Amherst;University of Minnesota, Minneapolis

  • Venue:
  • ICAC '05 Proceedings of the Second International Conference on Automatic Computing
  • Year:
  • 2005

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Abstract

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 multi-tier 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 Linuxbased 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.