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:
Mar. 17, 1998
Filed:
Jun. 10, 1996
Fumio Gomi, Yokohama, JP;
Kazutoshi Amano, Yokohama, JP;
Tomohiro Sakaue, Yokohama, JP;
Hiroyuki Shinozaki, Fujisawa, JP;
Masahiko Hashimoto, Fujisawa, JP;
Takafumi Nogami, Yokohama, JP;
Shigehiro Hatakeyama, Yokohama, JP;
Takenori Iwato, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Software Engineering Co., Ltd., Yokohama, JP;
Abstract
A method and a system for analyzing the operation of a parallel data system are disclosed. The history information of the access executed by a specific processor that has received a request for access to a plurality of data bases connected to a plurality of processors, the ID of the specific processor and the accessed data amount are collected and stored in a memory. The history information is compared with the time assumed from a predetermined time specified for the access to a unit amount of data in data bases, deciding whether the former is reasonable or longer than the latter. The transfer history information for the processor that has transferred an access request to the specific processor executing the access is compared with a predetermined transfer time specified for a unit amount of data, deciding whether the transfer time between the two processors is longer than an assumed transfer time. It is thus possible to determine whether an abnormal condition of the parallel data base system is caused by an internal fault of the processors or due to a defect of the access request transfer path between processors.