Abstract:

Resource coallocation is one of the crucial technologies affecting the utility and quality of services of largescale Gridlike distributed environments by simultaneously allocating the requested multiple resources to a single submitted application to meet the specific performance requirements. This paper presents a discreteevent driven simulator for studing the coallocationrelated resource management and scheduling algorithms. This tool models the main Grid components and their functions for coallocating grid jobs, including Grid user，metascheduler, coallocator, and coreservator. Some main scheduling algorithms and policies, including First Come First Served, First Processor First Served and Backfilling, are  implemented.

Key words: distributed computing;coallocation;coreservation;simulation