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There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
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We study the scheduling of a multi class single server system in a non-stationary setting, where the server is overloaded for a period of time due to the increase in customer arrival rates. As a result of the quality of service contracts, this overload situation incurs a penalty cost. The QoS level depends on the customer type and the customer arrival rates vary in a cyclic pattern. In each cycle, there is a high period, when the server is overloaded,
i.e. the total traffic intensity is bigger than 1, and a low period when the total traffic intensity is less than 1. We study the fluid model of this system under a special type of QoS contract and provide thes cheduling policy that minimizes the total cost in a cycle.
