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:
Mar. 22, 2016
Filed:
May. 13, 2013
Hitachi, Ltd., Tokyo, JP;
Shinichi Hayashi, San Jose, CA (US);
Toshio Otani, Sunnyvale, CA (US);
Hitachi, Ltd., Tokyo, JP;
Abstract
Exemplary embodiments provide a technique to manage object based tier to improve allocation of media to unallocated area. In one embodiment, a method of allocating an area of a logical volume to an unallocated area of a virtual volume for a write command comprises: calculating an object location of an object based on the write command and an object allocation information, the write command containing a virtual volume name and a virtual volume address of a virtual volume; selecting a tier from a plurality of tiers based on the calculated object location and an object and tier definition information; selecting a media type from a plurality of media types based on the selected tier and a tier and media definition information; and selecting a logical volume from a plurality of logical volumes based on the virtual volume specified by the write command, the object allocation information, a pool information, and the selected media type.