公开(公告)号：JP2001147903A

公开(公告)日：2001-05-29

申请号：JP2000278528

申请日：2000-09-13

Applicant: IBM

Inventor： MICHAEL IGNATOSKI ,  HELLER THOMAS J JR ,  GOLDRIAN GOTTFRIED

IPC: G06F12/06 ,  G06F12/08 ,  G06F15/16

Abstract: PROBLEM TO BE SOLVED: To provide a novel structure for a highly scalable high-performance shared memory computer system having simple production possibility. SOLUTION: The intra-node bus mechanism of a peculiar type connects respective system cells in each of nodes to the other respective cells inside the same node. An inter-node bus can be shared by plural nodes. Even when all the memory subsets inside all the cells of the shared memory system can be accessed by all processors, bus competition to occur inside a shared memory is remarkably reduced. A node directory automatically manages the coherence of all data to be changed inside all processor caches in the computer system and provides data coherence over all the nodes in the computer system.