Method for handling slot requests over a network

Details Method for handling slot requests over a network Method for handling slot requests over a network

1987-01-14

1989-02-21

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 1516

Patent

active

048071188

ABSTRACT:
A method for transferring idempotent and non-idempotent requests (repeatable and non-repeatable requests respectively) over a network between two or more computer systems. The method includes sending a series of messages over a network to perform the request. The method defines several types of messages: a request message, a response message, a slow request message, and an acknowledge message. A slow request is handled by sending a slow request message in response to a retransmitted request message. When the computer system which received the request message has completed the request, a response message is sent to the requesting computer system. The requesting computer system then transmits an acknowledge message to acknowledge receipt of the response if the requesting computer system has received a slow request message even if the request was idempotent. The method reduces the amount of request message traffic on a network of the type where messages are subject to loss.

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patent: 4639921 (1987-01-01), Gang et al.
patent: 4661902 (1987-04-01), Hochsprung et al.
Spector, "Performing Remote Operations Efficiently on a Local Computer Network," Communications of the ACM, vol. 25, No. 4, p. 246, Apr., 1982.
Cheriton and Swaenepoel, "The Distributed V Kernel and its Performance for Diskless Workstations", PROC 9th Symp. on O.S., pp. 128-140, 1983, copy is draft version.

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