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Grid Computing, a newly arisen technique that builds on the Internet, makes use of the network to share geographically dispersed resources, such as computing resources, storage resources and network resources to form a virtual super computer to provide the powerful computing ability. QoS (Quality of Service) is an issue about the long-term reliability and usability of network, with a explicate meaning how users think of network actions in the course of holding net-connection and grouping transfers. However, QoS in grid environment includes not only traditional QoS of network, but also other types of QoS, such as in CPU,disks, software, etc. It makes sure that applications will obtain the capabilities in need. That is to say, QoS of grid is a general effect on which applications, user terminal, network, servers act.Agent is a kind of intelligent entity that is autonomous, social, active and adaptable. Agent technique is a fruitful method for developing distributed system, which can provide an ideal approach to solve questions in the grid
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