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:
Jul. 11, 2017
Filed:
Jul. 29, 2013
Hitachi, Ltd., Tokyo, JP;
Shinichi Hayashi, Tokyo, JP;
Yusuke Funaya, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A computer system according to the present invention is composed of a serverhaving a flash memory drivefor cache, a storage systemhaving storage tiers composed of an SSDand an HDD, and a management server having a page tier determination programfor determining the storage tier to which data is to be stored. The page tier determination programmigrates data having a high read access rate out of the pages having a high cache rate to the flash memory driveto a storage tier of the HDD, and confirms so that data is not stored in a duplicated manner to the flash memory driveand the SSD. Further, the data having a relatively high write access rate is migrated to the storage tier of the SSDso as to prevent deterioration of write process performance.