Abstract: In grids, the heterogeneous computing resources are distributed across the world. Hence, scheduling is one of the most important issues in the research of grid computing. WSRF is initiated by Globus Alliance for modeling and accessing stateful resources with Web services. This paper introduces CSF4, a metascheduler developed by us based on WSRF. CSF4 can coordinate local and remote heterogeneous resources via GRAM protocol. CSF4 is one of the first WSRF metaschedulers in the world and released as an execution component of Globus Toolkit 4.

Key words: grid computing, metascheduler, Globus, WSRF, CSF