The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 29, 1997
Filed:
May. 03, 1995
Takashi Sakakura, Kamakura, JP;
Jose Uemura, Kamakura, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
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.