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. 07, 2010
Filed:
Oct. 20, 2008
Bernd Dowedeit, Holzgerlingen, DE;
Bernd Dowedeit, Holzgerlingen, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
The number of concurrent systems locks supported on a Sysplex is limited. Since persistent system locks may not be released for a long time, the limit may be reached resulting in outage periods. Access to resources may be managed through shared variables across a cluster of computing systems. Processes running on the cluster can use shared variables that are either exclusive or non-exclusive. An exclusive shared variable associates a resource with a process that has exclusive control of the resource. Since each exclusive shared variable is unique across the cluster, another application cannot create a second exclusive shared variable to control the resource. There is no limit on the number of exclusive shared variables that can be created on a cluster. Using exclusive shared variables instead of persistent system locks can prevent a system from reaching the limit of concurrent system locks while allowing processes exclusive use of resources.