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LIVE MIGRATION MODEL OF VIRTUAL MACHINES WITH HYBRID APPROACH

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Subject of Research.The paper deals with the process of live migration for virtual machines without service interruption. We propose a model for time estimation of virtual machine  migration and service down time at live migration with "hybrid approach". Migration of virtual machines enables the applications to navigate transparently together with their execution environments between physical hosts. The migration of virtual machines without service interruption (Live Migration) is used to balance the load efficiently and optimize the deployment of virtual machines on physical nodes in data centers. Method. We have proposed a hybrid approach for live migration from the position of migration  time and service down time during the migration of virtual machines. Main Results. An analytical model is proposed that allows estimating the time of virtual machines migration and the inaccessibility of services during live migration with a hybrid approach. The migration process is analyzed with the use of a hybrid approach and compared to the other mechanisms. It is shown that the usage of hybrid approach virtual services with the same high read-write speed gives the possibility to minimize simultaneously migration time and service down time as compared to the mechanisms with copying process before stop and after it. Practical Relevance. Predicting the migration time and the inaccessibility of services is of interest in analyzing and optimizing computational processes in data centers where virtual machines can move between physical servers during preventive and emergency operations to provide intelligent load balancing. Also, the proposed models can be used to identify the possibility and feasibility of migration mechanisms incorporating into the management software products of virtualized infrastructure for various applications.

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