Shulou(Shulou.com)06/02 Report--

The server is an important equipment in the network construction, which stores application data and files. According to the different shape structure of the server, we usually divide the server into three types: rack server, tower server and blade server.

Tower server is generally seen the most, its shape and structure are similar to ordinary desktops, but a slightly larger head, there is no unified standard for its size.

The motherboard of the tower server has strong expansibility and many slots, and the chassis of the tower server often reserves a lot of space for redundant expansion of hard disk, power supply and so on. This kind of server does not need additional equipment, does not require much storage space, and has good scalability and high configuration, so it has a wide range of applications and can meet the needs of common server applications.

This type of server is especially suitable for common entry-level and workgroup-level server applications, and the cost is relatively low, the performance can meet the requirements of most small and medium-sized enterprise users, the current market demand space is still very large.

However, this type of server also has many limitations, when it is necessary to use multiple servers to work at the same time to meet the needs of higher server applications, it is very unsuitable because of its large individual, large space and inconvenient management.

Rack server is actually a product under industrial standardization, and its appearance is designed according to a unified standard, which is used uniformly with cabinets to meet the server intensive deployment needs of enterprises. The main function of rack server is to save space, because multiple servers can be installed on one cabinet, which not only takes up less space, but also facilitates unified management. Rack servers are 19 inches wide and high in U (1U=1.75 inches = 44.45mm). There are usually 1U, 2U, 3U, 4U, 8U standard servers.

The advantage of this kind of server is that it takes up less space and is easy to be managed uniformly, but due to the limitation of internal space, the scalability is limited. For example, most servers with 1U have only 1 or 2 PCI expansion slots. In addition, heat dissipation performance is also a problem that needs to be paid attention to, in addition, organic cabinets and other equipment are needed, so this kind of server is mostly used by large enterprises with a large number of servers, and many enterprises use this type of server. however, the server is delivered to a special server hosting organization, especially at present, the servers of many websites are used in this way.

This kind of server is limited in scalability and heat dissipation, so its stand-alone performance is limited, and its scope of application is also limited. It often focuses on some applications, such as remote storage and network services.

In terms of price, rack servers are generally more expensive than tower servers with the same configuration.

Blade server is a kind of HAHD (High Availability High Density) low-cost server platform, which is specially designed for special application industry and high-density computer environment. Its main structure is a large main chassis, and many "blades" can be inserted inside, in which each blade is actually a system motherboard, similar to an independent server. They can boot their own operating system from their local hard drive. Each blade can run its own system, serve a specified different user group, and have no correlation with each other. Moreover, these motherboards can be grouped into a server cluster with system software. In cluster mode, all blades can be connected to provide a high-speed network environment, share resources, and serve the same user group. Inserting new blades into the cluster can improve overall performance. Because each blade is hot-swappable, the system can be easily replaced and maintenance time is minimized.

The article was transferred from: http://www.ityunxiu.com/news/industry/76.html

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