Abstract
The object of the research is the cluster systems of data centers containing a certain set of application servers, a servers file, data storage systems, an input-output system connected by a switching system and communication channels. The goal of the work is to increase the efficiency of using virtualized cluster systems by developing and applying a rational method for distributing virtual machines among the physical elements of the data centers. The proposed method is based on iterative greedy algorithm and a limited search procedure allowing to increase the performance of virtualized system due to rational data distribution. A simulation functioning model of the virtualized system was developed, its experimental study was carried out. The presented approaches provide determination of the required number of cluster nodes of the virtualized system with unpredictable load intensity and unpredictable level of resources requested by virtual machines.
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