Because of the particularity of power plant production, critical reliability of microcontroller system is necessary and the hot standby microcontroller system is often used.

Then the paper compared the trait of cold standby and hot standby,discussed advantage of hot standby in cutting down reboot time of custom board and route board,recover configuration time of custom board,and study router items time of router board.

Two work-modes, dual active and hot standby, are supported.

With the hardware redundancy and software fault- tolerant unifies, hot backup and the duplex working ways which replaced the traditional the fault- tolerant hot backup ways, proposed one kind of fault- tolerant design proposal suitable for the core router muster control system.

This paper first discusses the characteristics of non linear editing system, then pointing out the factors of unstable and unsafe exiting in the system, and providing two solving ways of hot backup and cold backup.

The methods and operation of breakpoints recovery during hot backup in the ORACLE database of the hospital is introduced.

Study and Design on Two-node Hot-standby Cluster;

This paper describes how to improve reliability by using a way of high availability method:two-node hot-standby redundancy,and two double-node hot-standby system models are given.

This paper introduces the importance of the data security of libraries in network systems,the classify of the data copy and in order to protect the data security,the library adopts the solution of master slave scratching and duplicate copy.

： This paper researches the achieved target，technology mechanism and application of duplex server and information with a duplicate copy in communication system．Associated with practical design，technology and implement based on master－slave is set forth，as well as condition and evolvement of master－slave switching