Grid is a distributed environment that integrates computing, storage and other resources in order to enable execution of applications that cannot be run on a single resource. Such environment requires advanced scheduling system in order to efficiently execute users' applications. In this paper, we give overview of issues related to grid scheduling. We describe in details one of the most mature solutions - Condor-G Matchmaking mechanism. Furthermore, we propose our own approach to building grid scheduling system based on Condor-G Matchmaking.
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