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:
Apr. 18, 2006
Filed:
Jan. 28, 2004
Isamu Kurokawa, Odawara, JP;
Junichi Muto, Odawara, JP;
Hisaharu Takeuchi, Odawara, JP;
Shinichi Hiramatsu, Odawara, JP;
Masaru Tsukada, Odawara, JP;
Isamu Kurokawa, Odawara, JP;
Junichi Muto, Odawara, JP;
Hisaharu Takeuchi, Odawara, JP;
Shinichi Hiramatsu, Odawara, JP;
Masaru Tsukada, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage system, which can execute sort processing of data without affecting online service, is disclosed. A storage control devicereceives a sort instruction specifying a record group for sorting and a sort key from a host device, reads the record group from an external storage deviceinto cache memory, and uses the cache memoryand a work area secured in the external storage deviceto execute sort processing of the above record group, and again stores the sorted record group in a prescribed output area within the external storage device. When a plurality of sort instructions are received, work areas are allocated automatically without overlapping work areas. When record updates occur during online service, a snapshot of the updated records is taken, and sorting of the snapshot is performed.