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. 20, 2011
Filed:
Dec. 20, 2004
Robert S. Blackmore, Poughkeepsie, NY (US);
Fu Chung Chang, Rhinebeck, NY (US);
Piyush Chaudhary, Fishkill, NY (US);
Jason E. Goscinski, Snoqualmie, WA (US);
Rama K. Govindaraju, Hopewell Junction, NY (US);
Leonard W. Helmer, Jr., Stone Ridge, NY (US);
Peter H. Hochschild, New York, NY (US);
John S. Houston, Hopewell Junction, NY (US);
Steven J. Martin, Poughkeepsie, NY (US);
Donald G. Grice, Gardiner, NY (US);
Robert S. Blackmore, Poughkeepsie, NY (US);
Fu Chung Chang, Rhinebeck, NY (US);
Piyush Chaudhary, Fishkill, NY (US);
Jason E. Goscinski, Snoqualmie, WA (US);
Rama K. Govindaraju, Hopewell Junction, NY (US);
Leonard W. Helmer, Jr., Stone Ridge, NY (US);
Peter H. Hochschild, New York, NY (US);
John S. Houston, Hopewell Junction, NY (US);
Steven J. Martin, Poughkeepsie, NY (US);
Donald G. Grice, Gardiner, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
In remote direct memory access transfers in a multinode data processing system in which the nodes communicate with one another through communication adapters coupled to a switch or network, failures in the nodes or in the communication adapters can produce the phenomenon known as trickle traffic, which is data that has been received from the switch or from the network that is stale but which may have all the signatures of a valid packet data. The present invention addresses the trickle traffic problem in two situations: node failure and adapter failure. In the node failure situation randomly generated keys are used to reestablish connections to the adapter while providing a mechanism for the recognition of stale packets. In the adapter failure situation, a round robin context allocation approach is used with adapter state contexts being provided with state information which helps to identify stale packets.