CLOUD SYSTEM WHICH CAN PROVIDE SERVICE BY DYNAMICALLY DETERMINING SERVICE LEVEL AGREEMENT BASED ON TRACK RECORD VALUE OF SERVICE LEVEL PROVIDED BY PRIMARY CLOUD OR UPDATED PREFERENCE INFORMATION, AND ALSO TO PROVIDE CLOUD CONTROL METHOD, AND COMPUTER PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a primary cloud server which selects and provides services including a secondary cloud by dynamically determining a service level agreement, according to a track record value of the service level provided by a primary cloud or updated preference information, and also to provide a method and computer program to provide the service.;SOLUTION: A track record value of the service level within a predetermined period of the first service provided based on the first service level agreement to a user is obtained. The second service level agreement which is different from the first service level agreement is determined based on the track record value of the service level. The second service which satisfies the determined second service level agreement is selected from the services provided by the primary cloud and secondary cloud based on the service selection priority, and provided together with the first service.;COPYRIGHT: (C)2011,JPO&INPIT