Quality of Service Negotiation for Commercial Medical Grid Services |
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Authors: | S E Middleton M Surridge S Benkner G Engelbrecht |
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Affiliation: | (1) IT Innovation Centre, University of Southampton, 2 Venture Road, Chilworth Science Park, Southampton, SO16 7NP, UK;(2) Institute of Scientific Computing, University of Vienna, Nordbergstrasse 15, 1090 Vienna, Austria |
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Abstract: | The GEMSS project has developed a service-oriented Grid that supports the provision of medical simulation services by service
providers to clients such as hospitals. We outline the GEMSS architecture, legal framework and the security features that
characterise the GEMSS infrastructure. High levels of quality of service are required and we describe a reservation-based
approach to quality of service, employing a quality of service management system that iteratively finds suitable reservations
and uses application specific performance models. The GEMSS Grid is a commercial environment so we support flexible pricing
models and a FIPA reverse English auction protocol. Signed Web Service Level Agreement contracts are exchanged to commit parties
to a quality of service agreement before job execution occurs. We run four experiments across European countries using high
performance computing resources running advanced resource reservation schedulers. These experiments provide evidence for our
Grid’s rational behaviour, both at the level of service provider quality of service management and at the higher level of
the client choosing between competing service providers. The results lend support to our economic model and the technology
we use for our medical application domain. |
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Keywords: | Grid Quality of service Negotiation Agent Pricing model Economic model |
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