DEVICE AND METHOD FOR SWITCHING SYSTEMS IN DUPLEXED SYSTEM

DEVICE AND METHOD FOR SWITCHING SYSTEMS IN DUPLEXED SYSTEM

PURPOSE:To prevent a user from sensing switching to a stand-by system while holding a link with a data transmission side computer without disconnecting it even when a fault is generated in a data reception side computer by receiving a message from a terminal by a current system and the stand-by syst...

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Hauptverfasser: TAKEMURA SATOSHI, SOMA MASATO, SAITO HITOSHI, CHIKUSHIMA TOSHIHIRO, KINOSHITA TOSHIYUKI, TOKUNAGA YOSHINORI, OGA TAKESHI, MORIOKA NORIO, YOSHINO ISAO, TOKIYODA HIROYUKI, MAYA YUZURU
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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creator TAKEMURA SATOSHI
SOMA MASATO
SAITO HITOSHI
CHIKUSHIMA TOSHIHIRO
KINOSHITA TOSHIYUKI
TOKUNAGA YOSHINORI
OGA TAKESHI
MORIOKA NORIO
YOSHINO ISAO
TOKIYODA HIROYUKI
MAYA YUZURU
description PURPOSE:To prevent a user from sensing switching to a stand-by system while holding a link with a data transmission side computer without disconnecting it even when a fault is generated in a data reception side computer by receiving a message from a terminal by a current system and the stand-by system. CONSTITUTION:Line control terminals 34, 54 respectively include message receiving queues and transmitting queues and successively connect messages received from terminals 6 to 9 and messages to be transmitted to the terminals 6 to 9 to respective queues. In the case of receiving messages from the terminals 6 to 9, a line switching device 5 connects a line to both of the current system 30 and the stand-by system 50 so that both the systems 30, 50 can simultaneously receive the same message. In the case of transmitting messages to the terminals 6 to 9, the device 5 switches and connects the line to the current system 30 so that a message can be transmitted only from the current system 30. Disk devices 3, 4 and shared memories 10, 20 are duplexed.
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subjects CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
title DEVICE AND METHOD FOR SWITCHING SYSTEMS IN DUPLEXED SYSTEM
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