The Seat Reservation System in Japanese National Railways

概要

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The first reservation system (,MARS)for Japamese National Railways (JNR)started its operation in 1960 with a development of MARS 1 The number of reservation seats has rapidly increased from 2,000 to 700,000 seats per day in more than 15 years. To cope with this increase in reservation seats and traffic, many MARS systems were developed since 1960. In 1972 MARS 105 started its operation by replacing all previous MARS systems, and has become one of the largest on-line system in Japan. Since then, MARS 105 has further expanded to handle more than 1,000,000 seats per day for the reservation period of 2 months. The outlines of applications, system configurations and environment characteristics of MARS 105arw discussed for background information on the railway reservation in Japan. The paper describes the reliability design of the system with emphasis on avoiding total system crash and reducing down time for high availability. The performance data of central computer system, such as MTBFs , causes of system crash, software failures and etc, are presented from past 5 years. These data are analyzed and compared with the original design for evaluation. The reliability of communication lines, terminals, air conditioning and power supply is briefly discussed.
一般社団法人情報処理学会の論文
1979-03-30