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:
Oct. 19, 2010
Filed:
Jul. 17, 2006
Mark Tsimelzon, Sunnyvale, CA (US);
Aleksey Sanin, Sunnyvale, CA (US);
Alexander Zeyliger, Redwood City, CA (US);
Mark Tsimelzon, Sunnyvale, CA (US);
Aleksey Sanin, Sunnyvale, CA (US);
Alexander Zeyliger, Redwood City, CA (US);
Sybase, Inc., Dublin, CA (US);
Abstract
A method for processing messages ensures that every message that enters a continuous processing system is fully processed in its entirety, even in the event of a failure within the system. Messages are pushed through an execution plan that includes a set of connected 'primitives' that process the message, where the primitives may be distributed across a group of servers. Messages are pushed through in accordance with a protocol that does not permit unprocessed messages to be permanently lost as they travel from input sources, between primitives, and to output sources within the execution plan. The input queue, output queue, and state (if any) associated with each primitive are saved in persistent storage at select checkpoints. If a failure occurs on a server, the server, after it starts up again, restores the primitives on that server to the input queues, output queues, and states saved at the last applicable checkpoint.