Server - Rack, Blades and Towers

Unlike tower servers, offices that use 1U rack servers, which are traditionally in,, 3U, 4U, 6U, or are installed in 2U rack. The names of the numbers for the server rack only comes to the issue of our dealing with them in. Occupy a 1U server The bay 1U, 2U and 4U occupy occupy two four, while a standard 42U rack size:

The servers in 1U Favoriteby companies for use in hosting and data because they are very compact (only 4.4 cm in height), which allows you to install a large number of servers per rack. The main limitations of this format is the restriction of ventilation ( because of the small inner room), prevent the use of processors with high energy consumption and the need for special coolers and fans, who all performed at an additional cost. In addition to the basic components to save space, in general, to install 2 or 4 hard3.5 "(in the delivery of other components) and an expansion card, placed horizontally, with the help of a riser.

Then there are the 2U server. Using "normal" power and cooling, and ultimately a bit 'less. The increased internal space makes the format more suitable for 2U server with two or more processors, or processors that use a high consumption. The vertical height is not enough to install expansion cards, as in the towerserver, but you can use a riser (as in the case of 1U), or use the tabs at half height (the lower plates, plates that have half the normal level).

Finally we have the biggest server using 3U or 4U. There are 6U server, but they are rare: this format is usually used by disk arrays and blade server chassis (see topic below). Using a 3U server unit or units, eliminates the problems of space, making expansion cardsbe fit in the vertical, and a large number of removable hard disk installed in bays, but causes the server to occupy more space rack that increases when the cost to the host data center, where more would pay a fee per pen.

Another format is becoming popular server blade (blade comes from "word" knife, which indicates the small size), a clever way to further increase the density of server and let thesharing of common components in data centers, such as power supplies and optical drives.

The idea is that instead of 10 1U servers, with 10 sources (or 20, as sources have been unnecessary use), 20 network cables (each server redundancy usually uses two cables, one for the network and a management or other), as well as power cords, used by KVM, and so forth, you can use a single chassis, with an equal number of blade servers.

Each leaf is acomplete with its independent server processor, memory, network and disks. Its small size, blade servers typically "uses low-power processors and hard drives of 2.5. In the beginning was the common use of Transmeta and VIA processors, but ended up being almost completely replaced by Intel and AMD multi-core processors that are faster, but still relatively cheap. In the case of hard disks, 2.5-inch drives are favored for the delivery of a childaccess times (but the losses on the transfer rate), in addition to electricity.

Maybe not all are equally made blade system. So if you are going to jump into the magazine campaign, you have the best system to measure the blade for your business to find. Check the following equations that will help you compare between them:

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