The system adopts redundancy technique and error proof measure : communicating process uses a self - adapting protocol and crc ; master computer software can avoid human - initiated - failure , check data border , limit authority , backup system data and start backup computer by software etc . to some extent , these ways help to increase the reliability of the system 本系统采用了冗余技术和容错措施:系统中的通信过程采用了自适应协议和crc差错检验;上位机软件具有防止人为误操作、数据边界检查、权限限制、系统数据备份和软件实现双机热备用等功能。一定程度上提高了系统的可靠性。
In the procedure of the implementation of the db155m2ip , we also study the theory and concept of the online dual backup system , the difference between db155m2ip and the online dual backup system , the theory of online , the theory of hot swap between primary system and secondry system , fault upload and the implementation of the system software . . after implementation the db155m2ip , we test the performance of the db155m2ip , the hot time between primary system and secondry system , fault upload , fault test , fault location 在db155m2ip系统的实现过程中,本课题主要研究了双机热备份的概念和工作原理; db155m2ip系统和传统双机热备份系统的不同点; db155m2ip系统心跳线的工作原理、主服务系统和从服务系统之间的切换原理和条件、系统出现故障后的一些故障上传和相应的软件子系统的实现。
Finally , through analysising every module of online dual backup system , we select the markov module to describe the db155m2ip system , and study the reliability and safety of the db155m2ip system . in addition , we analysis the reliability and safety of the db155m2ip system . use the language - matlab . through the results , we look up the parameters which effects he reliability and safety of the online dual backup system . this is very important for user to understand the reliability and safety of the online dual backup system throuth theoty analysis 并对db155m2ip系统的特点进行了阐述。随后通过对现在的双机热备份系统的各个模型进行分析比较,并选择了适合描述双机热备份系统的马尔可夫模型来描述db155m2ip系统的工作状态转移,并利用matlab编写仿真程序对db155m2ip系统的可靠度和安全度进行分析。
backup systemとは意味:バックアップ?システム、バックアップ体制{たいせい} backup system meaning:[Systems engineering] "A system, normally redundant but kept available to replace a system which may fail in operation."backup system en francais:système de sauvegarde, de backup (système permettant de sauvegarder et de reconstituer les données en cas de panne du système)backup system перевод:дублирующая система комп.