Two server cluster operation set up guide

Server cluster system, the server is no longer distributed everywhere, but centralized for the unified management and maintenance. It maintains the advantages of the distributed client/server model, and has the advantages of resource sharing in terminal/host mode and centralized easy management. The relatively centralized cluster system reduces the cost of system management and provides the ability to deal with large server systems in a comparable capacity.

In the traditional terminal/host network mode era, the terminal function is simple, no maintenance work, at the host end of the special management and maintenance, with resource sharing, easy to manage the characteristics. But, the host cost is expensive, the terminal does not have the processing ability, limits the network large-scale development. After the client/server model has promoted the development of the standardization and Development of the computing industry, provided a considerable flexibility for the system, but with the scale of the distribution system expanded, the maintenance and management of the system has brought huge costs.

For the Internet-oriented service application, it needs High-performance hardware platform as support, it is the inevitable trend of computer development to apply the parallel technology in the server domain. Parallel http://www.aliyun.com/zixun/aggregation/20795.html "> Processing technology in High-performance computing field, high availability and high-performance are two important directions of Cluster Server system development.

Cluster concept

Cluster English name is cluster, is a group of independent, through high-speed network interconnected computers, they construct

into a group and managed in a single system. When a customer interacts with a cluster, the cluster is like a separate server. Cluster configuration is used to improve availability and scalability.

Compared with the traditional high-performance computer technology, cluster technology can use each grade server as the node, the system cost is low, can realize very high computation speed, completes the computation of large computation, has the high response ability, can meet today's increasing information service demand.

Requirements for cluster technology applications

The exponential growth of Internet users and the complexity of scientific computing require computers to have more processing power, and CPU development cannot keep up with growing demand, so we face the following problems:

Large-scale calculations such as genetic data analysis, meteorological forecasts, and oil exploration require extremely high computational performance.

The development of application scale makes it difficult for a single server to bear load.

Growing demand requires flexible scalability of the hardware.

Critical business requires reliable fault-tolerant mechanisms.

The characteristics of IA cluster system (CLUSTER)

A unified computer system is formed by the interconnection of several complete computers;

Can be used off-the-shelf 11585.html "> Hardware equipment or special applications of hardware equipment, such as dedicated communications equipment;

Special software support is required, such as operating systems or databases that support cluster technology, etc.

Can realize a single system image, namely operation control, IP login point, file structure, storage space, I/O space, Operation management system and so on single;

In the cluster system, new servers can be dynamically added and servers that need to be eliminated, so that the system can be maximized to meet the needs of growing applications;

Usability is the most important factor in the application of cluster system, and it is an important index of evaluating and measuring system.

can provide users with uninterrupted service, because the system includes a number of nodes, when a node failure, the entire system can still continue to provide users with services;

With a very high performance price ratio, compared with the traditional mainframe, has a great price advantage;

The resources can be fully utilized, each node of the cluster system is a relatively independent machine, when these machines do not provide services or do not need to use, can still be fully utilized. The newer parts on the mainframe are hard to reuse.