Electrical computers and digital processing systems: multicomput – Computer-to-computer protocol implementing – Computer-to-computer handshaking
Patent
1997-06-30
2000-01-11
Rinehart, Mark H.
Electrical computers and digital processing systems: multicomput
Computer-to-computer protocol implementing
Computer-to-computer handshaking
709219, G06F 1338, G06F 1517
Patent
active
060147105
ABSTRACT:
A first computer sends a sequence of messages to a second computer using remote write operations to directly store each message in a corresponding memory location in the second computer, without performing remote read operations to confirm storage of each message in the second computer's memory. The first computer detects message transmission errors, if any, during the transmission of each message to the second computer and when a message transmission error is detected, resends the message to the second computer. The first computer also sends trigger messages to the second computer to prompt the second computer to process messages stored in the second computer's memory. The second computer processes each received message and uses a remote write operation to store an acknowledgment message in a corresponding memory location in the first computer. The first computer, upon detecting a failure to receive the acknowledgment message corresponding to any of the previously sent messages, undertakes remedial actions to determine whether the second computer has processed each of the unacknowledged previously sent messages. When the remedial actions determine that the second computer has not processed the unacknowledged previously sent message, the first computer prompts the second computer to process the unacknowledged previously sent message. When the remedial actions determine that the second computer has already processed the unacknowledged previously sent message, the first computer stores the acknowledgment message in a corresponding location in the first computer's memory.
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"Microsoft Windows NT Server Cluster Strategy: High Availaibilty and Scalability with Industry-Standard Hardware"; A White Paper from the Business Systems Division of Microsoft; pp. 1-9.
Pease Marshall C.
Talluri Madhusudhan
Rinehart Mark H.
Sun Microsystems Inc.
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