High Availability Mail Server

Cluster is a hot topic, in the enterprise more and more application of Linux operating system to provide mail, Web, file storage, database and other services, with the growing application of Linux, high availability and http://www.aliyun.com/zixun/aggregation/ 13996.html "> Load balanced Linux cluster is also developing gradually in the enterprise. The low cost, high performance and high scalability of the Linux platform enable the Linux cluster to meet at a low price ...

Blade servers have been used in a handful of enterprise computing centers, and today, their shadow is everywhere, from the synthesis of 3D special effects video processing computer, Web server, Enterprise Data center, to the SME "rollout" information system. It is predicted that blade servers may even begin to replace desktop computers, and through the popular "Blade PC" technology, more than 10 users can share the resources of a single blade server and build multiple "virtual PCs". 　　So the blade platform is by no means just a solution for a large enterprise data center. Blade server is currently the global server market share ...

A blade server is a large number of hot-swappable devices, called blades, that can be accommodated in a chassis. A server blade is a stand-alone server that includes one or more processors and associated memory, disk storage, and network controllers, and runs its own operating system and applications. 　　The blades are shared with common infrastructure components such as power supplies, fans, CD-ROM and floppy disk drives, Ethernet and Fibre Channel switches, and system ports. Using lower-energy processors in some blades can also help users save on power and cooling.

In the business and enterprise network, generally are mining C mode, that is, "client-server" mode, according to the authority of the investigation and prediction, the future of the network development also shows the trend of centralized computing. 　　And the rise of data center to the server configuration density put forward more and more high requirements, it is in this situation, in order to break the limit of individual performance of the server, a new generation of clustered server-blade server. With the further development of large-scale computing and network server requirements for parallel processing capabilities, "collective power" to cast a powerful processing power blade server has been ...

What is a cluster? There are two common cluster architectures, one is web/internet cluster system, which is to place data on different hosts, that is, multiple hosts are responsible for one service at the same time, and the other is the so-called parallel operation! Parallel operation is actually the work of the same operation, to the entire Cluster inside the CPU to perform a synchronous operation of a function. Due to the computational power of using multiple CPUs ...

At present, the development of the global server market has entered a stable and mature stage, showing a slow growth trend. 　　However, under the wave not surprised market surface, but there is a "undercurrent", namely http://www.aliyun.com/zixun/aggregation/13737.html "> Blade server." Although today's blade server is still only a small subdivision, because of its total server market share of less than 10%, but more than 4 ...

As we all know, in recent years x86 server has been more and more widely used in various occasions, from file servers, Web servers to mail servers to large database servers, virtualization integration, especially in this year's Intel E7 series processor release, but also set off a wave of upsurge, Pointed at the Enterprise key application market Overlord-minicomputer. The IDC Global Server Research report shows that by the end of 2010, x86 servers exceeded 95% of global server shipments and nearly 60% of global server turnover. Market segments, in recent years, 4-way and 8-way service ...

The so-called Blade server (which is precisely called a blade server) means that multiple, modular server units can be plugged into a standard, rack-mounted chassis to achieve high availability and high-density. Each "blade" is actually a system motherboard. They can start their own operating system via "onboard" hard disk, such as Windows nt/2000, Linux, and so on, like a separate server, in which each motherboard runs its own system ...

Server market on a wide range of products, all the Chinese and foreign servers for large, medium and small users to launch a high middle and low full range of servers, especially in the low-end areas, the same level of server homogenization serious. And the major manufacturers in order to more prominent products hot: began in the service, the program to carry out guise, packaging, making similar products in the user to buy server products are more and more confused. &http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp ...

&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; With the increase of traffic volume and the rapid growth of traffic volume and data flow, the processing capacity and computing strength of the existing network have been increased correspondingly, so that single server equipment cannot afford it at all. In this case, if you throw away the existing device to do a lot of hardware upgrades, this will cause the waste of existing resources, and if again ...