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. 25, 2003
Filed:
Feb. 22, 1999
David Arlen Elko, Austin, TX (US);
Steven Bruce Jones, Poughkeepsie, NY (US);
Jeffrey W. Josten, San Jose, CA (US);
Inderpal Singh Narang, Saratoga, CA (US);
Jeffrey M. Nick, West Park, NY (US);
Kelly B. Pushong, Highland, NY (US);
David Harold Surman, Milton, NY (US);
James Zu-Chia Teng, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Coupling facility store-in cache structures are duplexed in order to improve data availability. That is, once duplexing is established, selective data is written to both a primary structure instance and a secondary structure instance. Thus, if one of the structure instances fails, then the other structure instance is used in order to prevent data from being lost. Duplexing can be started manually and/or automatically by the operating system. Further, a structure may be removed from duplex mode and enter simplex mode, if duplexing is not desired.