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:
Sep. 18, 2018
Filed:
Sep. 27, 2016
International Business Machines Corporation, Armonk, NY (US);
Ian Boden, Eastleigh, GB;
Nicolas M. Clayton, Warrington, GB;
Lee J. Sanders, Chichester, GB;
William J. Scales, Portchester, GB;
Barry D. Whyte, Auckland, NL;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method of managing a data storage cache, comprising: providing a redundant cache comprising first and second caches associated with first and second storage volumes. One of the first and second storage volumes is an active, and one is a passive volume. A write request is received at one of the volumes. If the write request is received at the passive volume, it is forwarded to the active volume. It is determined whether the active volume is a low latency volume. If it is a low latency volume, it is determined whether data exists in the cache associated with the active volume which overlaps with data contained in the write request. If no data exists in that cache which overlaps with data contained in the write request, the write request is processed straight down to said active volume.