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:
Jul. 28, 2015
Filed:
Jul. 18, 2012
Applicant:
Kenji Yamagami, Los Gatos, CA (US);
Inventor:
Kenji Yamagami, Los Gatos, CA (US);
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 12/00 (2006.01); G06F 11/14 (2006.01); G06F 11/34 (2006.01);
U.S. Cl.
CPC ...
G06F 11/1471 (2013.01); G06F 11/1448 (2013.01); G06F 11/3485 (2013.01); G06F 2201/81 (2013.01); G06F 2201/84 (2013.01); Y10S 707/99952 (2013.01); Y10S 707/99953 (2013.01); Y10S 707/99955 (2013.01);
Abstract
A storage system maintains a journal of journal entries and at least one snapshot of one or more data volumes. By assigning a unique sequence number to journal and snapshot, it is easy to find a journal which can be applied to the snapshot. A technique is described for detecting an overflow condition of running out of journal space and recovering the journal space.