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Progress of virtualization technology in recent years made it easy to build cache server in the Cloud. It became possible to increase Web service capacity using virtual cache servers. However, expected responsiveness can not be gained with insufficient cache servers against load. In contrast, costs will increase by surplus resources with too many cache(More)
We develop a distributed Web system that adjusts the number of virtual cache servers in the Cloud according to load of them to keep responsiveness and reduce running costs. A method of monitoring load of Web servers, and a algorithm to adjust the number of virtual cache servers are discussed in previous researches. This paper describes examination of time(More)
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