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:
Oct. 26, 2011
Masayuki Kikuchi, Chigasaki, JP;
Satoshi Saito, Odawara, JP;
Kana Katayama, Odawara, JP;
Yoshihiko Hosobuchi, Odawara, JP;
Masayuki Kikuchi, Chigasaki, JP;
Satoshi Saito, Odawara, JP;
Kana Katayama, Odawara, JP;
Yoshihiko Hosobuchi, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage apparatus provides a server apparatus with virtual volumes in thin provisioning; allocates a physical page to each pool page from a storage pool that is able to provide a plurality of types of physical pages classified into tiers, the pool page being an allocation unit of a storage area to the virtual volumes; stores an I/O count of each of the pool pages, stores an I/O count policy set for each of the applications; when receiving an I/O request, counts the I/O count of each of the pool pages in accordance with the I/O count policy set for the application having sent the I/O request; determines the tier of the physical page to be allocated to each pool page according to the I/O count of each pool page; and allocating the physical page in the tier determined for each of the pool pages.