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International Journal of Information Technology & Computer Science ( IJITCS )

Abstract :

As economic pressure builds globally, enterprises, municipalities and universities are starting to look at hybrid cloud build by combining public cloud and private cloud as a potential choice to reduce a total cost of ownership for IT. To optimize the hybrid cloud, it is necessary to minimize operational cost. We proposed the dynamic placement method which determines deployment and migration plan of applications to minimize the operational cost of the hybrid cloud. We showed that the total cost of this method was 43.9% lower than the conventional method in 5 years even if timing and frequency of the deployment and the characteristic of applications are unknown in advance. However, generally speaking, the time variability of compute utilization varies more widely than the storage utilization. As a result, dynamic placement method has a challenge that compute utilization is lower than storage utilization in the private cloud. In this paper, we propose a dynamic placement method with MIP which combines our dynamic placement method with conventional mixed integer program method. This method migrates applications among clouds using MIP when the difference between storage utilization and compute utilization expands in the private cloud. We show the effectiveness of the proposed method by evaluating in a simulation environment.

Keywords :

: hybrid cloud; dynamic placement method with MIP; optimization

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