Realizing cluster technology for large-scale network application system

&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Cluster simply put, a cluster (cluster) is a group of computers that provide users with a set of network resources as a whole. These individual computer systems are the nodes (node) of the cluster. An ideal cluster is that the user never realizes the nodes at the bottom of the cluster system, in their view, the cluster is a system, not multiple computer systems. And the administrators of the cluster system can add and revise the nodes of the cluster system at will.

In the rankings of the Top500 supercomputer selected this June, we can see that clustering technology (CLUSTER) has become the direction of today's supercomputers. The second-ranked Thunder is typical of cluster technology, which integrates 4,096 Intel Itanium2 Tiger4 1.4GHz processors, which can be calculated 22.938 trillion times per second. In addition, the Chinese are proud to be ranked tenth in Shanghai's supercomputer center, but also the use of clustering technology integrated 2,560 AMD Opteron 2.2 GHz processor, the operation speed of 11.264 trillion times per second.

Cluster technology is so powerful, what is clustering technology? In a nutshell, clustering technology is a technology that maximizes performance, reliability, availability, and scalability at a relatively low cost. It works like disk array technology (RAID), which connects multiple servers together as a single mainframe. But because cluster technology solutions are based on proprietary technology and lack of industry standards, the application environment costs extra to develop, manage, and migrate to new platforms.

In fact, the current clustering technology in the network server, such as the application of a very broad, as if the current large network servers are HTTP server, FTP server, database server, mail server and firewall server, such as a number of hosts, and then unified management by the operating system, To maximize its effectiveness.

Cluster Technology is not words to be clear, there are a number of current CLUSTER technologies, such as OpenVMS cluster,windows NT cluster,tru64 UNIX CLUSTER and Howe Culster. Each family has its own expertise and advantages, but their functional and technical principles are basically the same. The corresponding to the cluster technology is one machine technology, but because of its development costs and management costs are much higher than the cluster technology, so many companies have gradually reduced the one machine research and development efforts. We believe that with the rapid development of clustering technology, TOP500 's first chair will sooner or later belong to the computer using clustering technology!