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:
Sep. 02, 2008
Filed:
May. 01, 2003
Kentaro Chigusa, Yokohama, JP;
Kenichi Chadani, Yokohama, JP;
Morihiro Iwata, Tama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The amount of work processing (main processing amount) of a database is acquired and accumulated. A value (main processing index) indicating the transition of the amount of main processing amount available in a time frame that is presumed to be required for backup is calculated by using the amounts of main processing accumulated during the latest period of time. The main processing index is compared with the backup executability reference value which is a threshold value determining the backup executability. If the main processing index is smaller than the threshold value, backup is executed. If the main processing index is larger than the threshold value, backup is not executed but the amount of main processing is again acquired to calculate the main processing index, and the main processing index is compared with the backup executability reference value.