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Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 A System comprising a cluster of diskless Servers employing USC 154 (b) by 645 days. a distributed Shared memory abstraction that presents an area of shared memory for two or more processes executing (21) Appl. No.: 09/915,667 on different servers in the cluster. The invention provides the appearance of a shared memory Space between two or more (22) Filed: Jul. 26, 2001 processes thereby potentially reducing disk latency or elimi (65) Prior Publication Data nating redundant computation associated with conventional server clusters. The DSM abstraction may be dynamically US 2003/0023702 A1 Jan. 30, 2003 alterable Such that Selectable groups of processes executing (51) Int. Cl................................................. G06F 15/00 on the cluster share a common address Space temporarily.