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:
Oct. 29, 2013
Filed:
Sep. 28, 2011
Naoko Kumagai, Isehara, JP;
Tsutomu Sukigara, Oiso, JP;
Tetsuya Abe, Hiratsuka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Conventionally, the fees for using services of a storage system was calculated based on the status of use or access performance of storage areas and not based on migration of data. The present invention provides a storage system in which multiple tiers composed of storage areas of various memory devices are assigned in page units and the assigned tiers are changed based on access frequency, wherein stored costs are calculated based on status of use of the storage areas constituting the tiers, and migration costs are calculated and charged based on the amount of migration of data among tiers and the I/O access counts after migration, according to which appropriate charging of cost for using the storage system is enabled.