The Research Of High Availability Of Transaction Systems

With increasing improvement of network technology and the application of computer, many enterprises' daily businesses are mainly supported by computer systems. Most of these systems are the Online Transaction Processing Systems, and critical to enterprises. So there are more and more demand on the High Availability of computers and Transaction Systems. And people hope not only that the data of important business will be protected completely, but that online transaction won't be discontinuous or will recover automatically in the lest time. This is the problem of the HighAvailability of Transaction System.The Integrate System of Consume by Bank-card is an important business system of the Huaxia Bank. It is the transaction channel between the MIS System of merchant and the Bank-card Business System of the bank, and moreover, the bank's gateway is the key link of it. But at present the bank's gateway has single point failure problem, which drops lower the feasibility of the whole system and makes it impossible to maintain the consistency and perfection of transaction. So, to improve the feasibility of the bank's gateway is to improve the feasibility of the whole system. Research on this has realistic meaning.The article, at first, puts forward the conception and the ACID characteristic of transaction, and expounds the development and the standard of the Transaction Processing System; then, introduces the conception and development progress of the High Availability, and finally points out that it is very necessary for Transaction System to achieve.And in the article, the author gives the cause of systemfailure, and indicates that Software failure is the major factor. He also makes some initial inquiry into the High Availability theory and analysis of the availability of the system in the article. With studying the cluster technology, the author analyses the framework of Hardware and Software of the two-computer cluster system, and describes the critical factors in the achievement of the High Availability of cluster.Based on these theory and the actual condition of the Bank-card Consume System, the article transforms the framework of the two-computer cluster, improves the application software of the bank' gateway, and designs a set of High Available project suitable for the Integrate System of Consume by Bank-card. This project can improve the feasibility of the whole system and maintain the consistency and perfection of transaction as well.Finally, the article is expected to be able to provide some useful experience and help to the similar system design.