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建立在冗余技术基础之上的容错服务器在解决单点故障、缩短故障恢复时间、降低人为错误、减少部件和软件版本不兼容等方面对于集群服务器都显示出了优势,并有望成为服务器市场的亮点。2004年,一直以逾20％的市场占有率名列日本服务器市场第一位的NEC服务器,针对中国政府及医药等行业用户的需求,力推NEC Express 5800/ft系列容错服务器。集群技术已在服务器系统中广泛应用,但其缺陷也逐渐显露。其一是集群扩展产生了庞大的维护工作量;其二是即便最好的集群服务器在系统出现故障时至少需要一分钟的时间来解决,同时,集群技术是通过将主服务器内容复制到备份服务器上来实现纠错,一旦主服务器发生故障,主、备份服务器的切换时间,无法保证整个系统的不间断运转。 NEC Express 5800/ft系列服务器的技术核心是容错技术,它是NEC公司与美国容错公司多年联合开发的
Fault-tolerant servers based on redundancy technologies have demonstrated advantages for cluster servers in resolving single points of failure, reducing recovery times, reducing human error, and reducing incompatibility of components and software versions and are expected to become a server market Highlights. In 2004, NEC Server ranked No.1 in Japan’s server market with more than 20% market share. It pushed the NEC Express 5800 / ft series of fault-tolerant servers to meet the needs of Chinese government and medical users. Cluster technology has been widely used in server systems, but its flaws are gradually revealed. One is that the cluster expansion has a huge maintenance workload; the other is that even the best cluster server takes at least a minute to solve in the event of a system failure. In the meantime, cluster technology replicates the contents of the primary server to the backup server Up error correction, once the main server fails, main, backup server switching time, can not guarantee the continuous operation of the entire system. The technology core of the NEC Express 5800 / ft series of servers is fault-tolerant technology, which was developed by NEC for many years with the United States tolerant company