Invention Grant
- Patent Title: State recovery and failover of intelligent network adapters
- Patent Title (中): 智能网络适配器的状态恢复和故障转移
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Application No.: US10406095Application Date: 2003-04-02
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Publication No.: US07114096B2Publication Date: 2006-09-26
- Inventor: Douglas Morgan Freimuth , Ronald Mraz , Erich Nahum , Prashant Pradhan , Sambit Sahu , John Michael Tracey
- Applicant: Douglas Morgan Freimuth , Ronald Mraz , Erich Nahum , Prashant Pradhan , Sambit Sahu , John Michael Tracey
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent Duke W. Yee; Mark Wardas; Lisa L. B. Yociss
- Main IPC: G06F11/00
- IPC: G06F11/00

Abstract:
The present invention provides a method, computer program product, and data processing system for efficiently recovering state and performing failover of a network offload engine. The present invention distinguishes between the hard state and the soft state of a protocol. Hard state is state information that, when lost, leads to incorrect protocol behavior. Soft state is state information that may be lost or become inconsistent without loss of correctness. The present invention ensures correctness by always being able to recover the hard state of the protocol. A preferred embodiment of the present invention performs a failover of a network offload engine by temporarily blocking the reception of network packets, recovering hard state from host information, resuming network operation using a substitute network offload engine, and recovering soft state from the subsequent network activity.
Public/Granted literature
- US20040199808A1 State recovery and failover of intelligent network adapters Public/Granted day:2004-10-07
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