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:
Dec. 08, 2015
Filed:
Jan. 31, 2014
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventor:
Kenta Shiga, Yokohama, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/00 (2006.01); G06F 12/02 (2006.01); G06F 3/06 (2006.01); G06F 9/455 (2006.01);
U.S. Cl.
CPC ...
G06F 12/0223 (2013.01); G06F 3/061 (2013.01); G06F 3/067 (2013.01); G06F 3/0608 (2013.01); G06F 3/0641 (2013.01); G06F 3/0665 (2013.01); G06F 9/455 (2013.01); G06F 12/00 (2013.01); G06F 2009/45583 (2013.01);
Abstract
A pool is formed based on a plurality of storage devices. This pool is constituted by a plurality of real pages. Real pages of different lengths are included in this plurality of real pages. Among a plurality of virtual pages which make up a virtual volume, a controller compresses a write data element for a write destination virtual page, selects a real page of a real page length based on the data length of a data unit including the compressed write data element, and allocates the selected real page to the write destination virtual page.