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1 IRIT - Institut de recherche en informatique de Toulouse

Abstract : In an Infrastructure as a Service IaaS, the amount of resources allocated to a virtual machine VM at creation time may be expressed with relative values relative to the hardware, i.e., a fraction of the capacity of a device or absolute values i.e., a performance metric which is independent from the capacity of the hardware. Surprisingly, disk or network resource allocations are expressed with absolute values bandwidth, but CPU resource allocations are expressed with relative values a percentage of a processor. The major problem with CPU relative value allocations is that it depends on the capacity of the CPU, which may vary due to different factors server heterogeneity in a cluster, Dynamic Voltage Frequency Scaling DVFS. In this paper, we analyze the side effects and drawbacks of relative allocations. We claim that CPU allocation should be expressed with absolute values. We propose such a CPU resource management system and we demonstrate and evaluate its benefits.

Keywords : SLA enforcement Virtualization Cloud DVFS Heterogeneity

Author: Boris Teabe - Alain Tchana - Daniel Hagimont -

Source: https://hal.archives-ouvertes.fr/


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