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Nested QoS: Adaptive Burst Decomposition for SLO Guarantees in Virtualized Servers

Authored on: Aug 1, 2012 by Hui Wang et al

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Server consolidation in virtualized data centers introduces new challenges for resource management, capacity provisioning, and guaranteeing application quality of service (QoS). This paper presents Nested QoS, a formal model that specifies application QoS by a response time distribution based on the burstiness of the workload. The workload is adaptively decomposed into classes with different response time guarantees and scheduled using an Earliest Deadline First policy. A procedure for determining the decomposition parameters is developed, and empirical results showing the benefits of decomposition and adaptive parameter setting are presented.
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