The IST Phosphorus project studies and implements an optical Grid test-bed. Through supporting studies, scheduling, routing and dimensioning algorithms for optical grids will be researched. Given the high costs involved in setting up actual hardware implementations, simulations are a viable alternative. In this paper we present the first studies, proposing job models reflecting real-world grid application traffic characteristics. We detail several such models and the process to extract the

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... red model parameters from actual grid log traces, and verify that synthetically generated jobs (to be fed to a simulator) provide a realistic approximation of the real life grid job submission pattern.