The server can generally be divided into four types, server tower and blade servers and rack servers and high density server.
1. Tower Servers
Some use the vertical size desktop PC roughly the chassis, some with large-capacity chassis, like a huge cabinet, it is primarily divided into single-and twin-tower.
Scalable server motherboard stronger, but also more than a bunch of slots, pen head general motherboard larger, because the host server tower chassis is larger than the average case, usually set aside enough internal space for future hard disk with power extension. Since relatively large tower server chassis, server configuration can also be very high, redundancy can be extended more complete, so a very wide range of applications, is currently the highest utilization rate of a server. Current common entry-level and workgroup-level servers are basically using this type of server architecture, but because only one host, even though there is also upgrading expansion limit, so in some high demand enterprise applications, stand-alone server can not meet the requirements, the need for multi-machine work together, and tower servers too big, too independent, collaborative work is not easy in the space occupied and systems management, this is tower server limitations. Overall, however, this type of server functionality, performance can basically meet the requirements of most business users, the cost is usually relatively low, so this kind of server, or has a very broad application support.
2. Rack Server
Shape looks like a computer, but as a switch, there is 1U (1U = 1.75 inch), 2U, 4U and other specifications. Rack-mounted servers installed in a standard 19-inch rack inside.
Compared tower servers, rack servers and more loved by the companies, the obvious advantage of a small footprint, more space-saving, easy to manage. It can be installed on multiple servers in a rack, more suitable for multiple servers at the same time working in the enterprise use, but it is also for this reason, heat dissipation is less than the rack server tower server, which is the establishment of enterprises consider selecting a server factor.
3. Blade servers
Blade servers are a technique called "HAHD (High Availability High Density, high availability high-density)," the low-cost server platform, is a specialized and high-density computer environments designed for specific industry applications. Rack-mounted server that is structurally more compact than the previously described, because it is the same as the blade is very thin, and one can select whether the entire server system cabinet, so called "blade", as required in FIG. The main application cluster service.
Blade servers are the three most space, as the name implies, each of which is similar to insert a separate server, and therefore heat dissipation performance is more than Note rack servers, are often required to install a large fan for cooling, which is more suitable server to the establishment of large enterprises, such as blade servers in the cluster mode, it can be used simultaneously to provide high-speed network environment, improve the user experience.
4. The high-density servers
High-density server for cloud computing, data center, Internet application server architecture to optimize the launch of high-density servers can integrate more processor and I / O expansion capability in a smaller physical space, greatly reducing the customer space costs and significantly improve computing performance, while addressing user needs, flexible and scalable within specific industry needs. Different high-density server using separate power supplies and fans with the common rack server design, in the same chassis by a plurality of server nodes sharing power supplies and fans, thus greatly improving the use efficiency of the power and cooling systems, which makes the weight and reduction and lower cost. High-density blade server versatility better than servers, more effective in terms of cost reduction.
In short, high-density server as a new universal system platform, the flexibility to support a variety of application services in petroleum, meteorology, oceanography, seismology, mapping, bio-medical, military applications include. But it can also support social networking, interactive media, online games, scientific computing, image rendering, modeling, simulation and so on. It is thanks to higher than normal density rack servers, blade servers lower than the cost, modular, flexible expansion, ease of management and green energy-saving advantages characteristics.