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:
Aug. 15, 2017
Filed:
Jun. 29, 2015
International Business Machines Corporation, Armonk, NY (US);
Daniel M. Aizer, Petah-Tiqwa, IL;
Yuval Ben-Horin, Petah Tikva, IL;
Michael Keller, Haifa, IL;
Osnat Shasha, Holon, IL;
INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US);
Abstract
Methods, computing systems and computer program products implement embodiments of the present invention that include configuring a first storage system to mirror first storage regions to corresponding second storage regions in a second storage system via a first data connection, and to mirror the first storage regions to corresponding third storage regions in a third storage system via a second data connection. Upon the second storage system receiving, subsequent to detecting a failure of the first storage system, a host I/O request to retrieve data from a given second storage region and determining that the respective timestamp of the corresponding third storage region on the third storage system is more recent than the respective timestamp of the given second storage region on the second storage system, the second storage system retrieves, via a third data connection, the data from the corresponding third storage region on the third storage system.