RAD Lab: SCADS/Director (Beth Trushkowsky)
227 views · Published 11 March 2011 · 27:55 · Indexed 23 October 2026
Channel: CITRIS and the Banatao Institute · 2011 · Science & Technology
Speaker: Beth Trushkowsky) Abstract: Elasticity of cloud computing environments provides an economic incentive for automatic resource allocation of stateful systems running in the cloud. However, these systems have to meet strict performance Service-Level Objectives (SLOs) expressed using upper percentiles of request latency, such as the 99th. Such latency measurements are very noisy, which complicates the design of the dynamic resource allocation. We design and evaluate the SCADS Director, a control framework that reconfigures the storage system on-the-fly in response to workload changes using a performance model of the system. We demonstrate that such a framework can respond to both unexpected data hotspots and diurnal workload patterns without violating strict performance SLOs.
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