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:
Apr. 29, 2008
Filed:
Oct. 08, 2004
Sunita Shrivastava, Redmond, WA (US);
Chittur P. Subbaraman, Carnation, WA (US);
Sunita Shrivastava, Redmond, WA (US);
Chittur P. Subbaraman, Carnation, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
In a server cluster, a system and method is provided for mitigating redundant resource failure notifications and other problems resulting from late handling of messages. Traditional resource management can result in the generation of redundant resource failure notifications that trigger unnecessary recovery actions, or cause other cluster problems such as performing an action that has previously been handled as part of failure recovery. The present invention tracks resource failures and eliminates recovery actions for redundant resource failure notifications. An incarnation number is passed to a resource each time it is called, and is incremented whenever a resource failure notification is delivered. Failure notifications having an incarnation number lower than the current incarnation number are discarded. Message processing similarly uses an incarnation number to distinguish between queued messages that correspond to those from a currently healthy node and those from a previous incarnation of the node, which no longer have meaning.