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:
Nov. 08, 1994
Filed:
Feb. 04, 1991
Taketoshi Sakuraba, Sagamihara, JP;
Toshiaki Arai, Sagamihara, JP;
Nobuo Yamamoto, Yokohama, JP;
Masamitu Nomura, Ikoma, JP;
Kazuo Imai, Higashikurume, JP;
Michio Tandai, Yokohama, JP;
Toru Yamamoto, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Seibu Soft Ware Co., Ltd., Osaka, JP;
Hitachi Software Engineering Co., Ltd., Yokohama, JP;
Abstract
A method of controlling data which is stored into a common storage in a multiprocessor system having a common storage which can be accessed from a plurality of computers is disclosed. Particularly, a method of controlling shared data using an extended storage as a common storage is disclosed. The copy of the data of a part of or all of a shared data set in an input/output device and the copy data control information to control the copied data are stored into the common extended storage. In the case of accessing the data in the common extended storage, the mutual exclusion among a plurality of computers and the consistency control of the data are realized by referring to the control information stored in the common extended storage.