Nested QoS: providing flexible performance in shared IO environment

  • Authors:
  • Hui Wang;Peter Varman

  • Affiliations:
  • Rice University;Rice University

  • Venue:
  • WIOV'11 Proceedings of the 3rd conference on I/O virtualization
  • Year:
  • 2011

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Abstract

The increasing popularity of storage and server consolidation introduces new challenges for resource management. In this paper we propose a Nested QoS service model that offers multiple response time guarantees for a workload based on its burstiness. The client workload is filtered into classes based on the Service Level Objective (SLO) and scheduled to provide requests in each class a stipulated response time guarantee. The Nested QoS model provides an intuitive, enforceable, and verifiable SLO between provider and client. The server capacity in the nested model is reduced significantly over a traditional SLO while the performance is only marginally affected.