Abstract
To improve the running efficiency of business workflow in cloud environment,a policy of replica allocation of cloudy services was proposed.Taking the advantage of social network analysis,the policy specified the central service nodes in a service network based on mining the social network properties such as connectivity and centralization for a service community.The host physical machine of the replica of the central service was specified according to the analysis of logical sequence between the central service and its pre-service,and the usage of other physical machines.The analysis and simulation show that the policy can improve the running efficiency of data intensive business workflow in a cloud environment by averaging the overload of physical machine and reducing the time wasted by long-distance service interaction.
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