Abstract
In consolidated virtualization systems, hardware resources are shared and multiplexed across multiple virtual machines (VMs) for energy and cost savings, where resources are over-provisioned according to the peak demand of VMs to provide performance guarantees. This over-provisioning manner results in resource waste and contention under heavily load conditions. As a result, there is a need to multiplex resources among VMs in a fine-grained thin-provisioning manner in heavily loaded virtualized system. In this paper we propose such a thin provisioning approach for resource allocation among VMs with minimal performance degradations. Our approach consists of two parts: one is workload characterization, and the other is dynamic resource allocation via prioritization. Experiments on a Xen based virtualized environment are conducted and evaluated. The results show that the proposed approach can support concurrent contending requests with acceptable performance penalties.
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