The effects of scheduling, workload type and consolidation scenarios on virtual machine performance and their prediction through optimized artificial neural networks

Authors:
George Kousiouris;Tommaso Cucinotta;Theodora Varvarigou
Affiliations:
Dept. of Electrical and Computer Engineering, National Technical University of Athens, 9, Heroon Polytechniou Str., 15773 Athens, Greece;Real-Time Systems Laboratory (ReTiS), Scuola Superiore Sant'Anna, Via Moruzzi, 1, 56100 Pisa, Italy;Dept. of Electrical and Computer Engineering, National Technical University of Athens, 9, Heroon Polytechniou Str., 15773 Athens, Greece
Venue:
Journal of Systems and Software
Year:
2011

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Abstract

The aim of this paper is to study and predict the effect of a number of critical parameters on the performance of virtual machines (VMs). These parameters include allocation percentages, real-time scheduling decisions and co-placement of VMs when these are deployed concurrently on the same physical node, as dictated by the server consolidation trend and the recent advances in the Cloud computing systems. Different combinations of VM workload types are investigated in relation to the aforementioned factors in order to find the optimal allocation strategies. What is more, different levels of memory sharing are applied, based on the coupling of VMs to cores on a multi-core architecture. For all the aforementioned cases, the effect on the score of specific benchmarks running inside the VMs is measured. Finally, a black box method based on genetically optimized artificial neural networks is inserted in order to investigate the degradation prediction ability a priori of the execution and is compared to the linear regression method.