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. 17, 2010
Filed:
Jun. 11, 2007
James R. Challenger, Garrison, NY (US);
Louis R. Degenaro, White Plains, NY (US);
James R. Giles, Yorktown Heights, NY (US);
Gabriela Jacques Da Silva, Champaign, IL (US);
James R. Challenger, Garrison, NY (US);
Louis R. Degenaro, White Plains, NY (US);
James R. Giles, Yorktown Heights, NY (US);
Gabriela Jacques Da Silva, Champaign, IL (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method is provided for the recovery of an instance of a job manager running on one of a plurality of nodes used to execute the processing elements associated with jobs that are executed within a cooperative data stream processing system. The states of the processing elements are checkpointed to a persistence mechanism in communication with the job manager. From the checkpointed processing element states, the state of each distributed job is determined and checkpointed. Processing element states are also checkpointed locally to the nodes one which the processing elements are running. Following a failure of the job manager, the job manager is reinstantiated on one of the nodes. The recovery instance of the job manger obtains state data for processing elements and jobs from the persistence mechanism and constructs an initial state for jobs and processing elements. These initial states are reconciled against the current states of the processing elements and adjustments are made accordingly. Once the job and processing element states are reconciled, the system is returned to normal operation.