Exclusive control unit for a resource shared among computers

Details Exclusive control unit for a resource shared among computers Exclusive control unit for a resource shared among computers

1995-05-03

1997-04-29

Asta, Frank J.

Boots, shoes, and leggings

39520003, 39520008, 395474, 395481, 364DIG1, G06F 1300

Patent

active

056257953

ABSTRACT:
The invention provides an exclusive control unit among computers which can reliably perform an exclusive control for a shared resource while keeping a system running as a whole even if a problem occurs in any of the computers in the system. Each of the computers is connected to the others through a LAN and to a distributed shared memory bus for connecting each distributed shared memory card mounted on each computer with the others. The distributed shared memory card has a distributed shared memory, which shares the shared resource with the other distributed shared memories, and a distributed shared memory controller which is connected with the distributed shared memory bus for making it possible to exchange data among the distributed shared memories mounted on the computers, an I/O bus inside its own computer, and its distributed shared memory, through its internal bus, and the distributed shared memory card performs an exclusive control for the shared data which is shared among the respective computers and exchanged among them through the distributed shared memory bus.

REFERENCES:
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patent: 5295133 (1994-03-01), Jurkevich
patent: 5377324 (1994-12-01), Kabemoto et al.
patent: 5390316 (1995-02-01), Cramer et al.
patent: 5437031 (1995-07-01), Kitami
patent: 5437047 (1995-07-01), Nakamura
patent: 5469549 (1995-11-01), Simpson et al.

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