【 Weak current College 】 data center information point planning

Due to the large, medium and small computer specification and information point number is determined by the host equipment, cabling designers are generally just collect their information point type and quantity, instead of routing them.

Due to the large, medium and small computer specification and information point number is determined by the host equipment, cabling designers are generally just collect their information point type and quantity, instead of routing them. Therefore, in the wiring plan focused on the amount of information point mainly comes from the server cabinet.

Statistical information points, it should be noted: each server terminal network connection/network blade on the information point number will not be the same, so in this article only select the typical or common values in data center design should be based on the selected server (or the purchase of preferred server) technical parameters for the actual calculation.

In the server cabinet, the type of server are:

The standard server placed inside the Cabinet;

Use 1U high rack-mountable Server fixed inside the Cabinet;

Use 3U above the blade combined installed inside the Cabinet;

For all three server structure, one can calculate each cabinet information point number:

Install a standard server cabinet

The most simple server cabinets are placed inside the Cabinet desktop's tray. Among them, in order to improve the utilization of the Cabinet, you can use simple host shared (KVM) of the computer monitor, keyboard and mouse to a set, you can also use the upscale host shared with monitor, keyboard and mouse to host room outside the control room and operation room.

Because conventional computer Cabinet dimensions is relatively large, so a Cabinet usually can only be placed 4 ~ 6 servers. Each server's information point number according to the number of network adapters, generally not more than 2 electric port and 1 optical port.

As far as this can be worked out, install a standard server cabinet, each cabinet General information number is 6 × 2 = 12 electric port, 6 x 1 = 6 optical parallel (12-core optical fiber), 6 x 1 = 6 KVM.

Install 1U rack server cabinet

A considerable number of server form factor is 1 ~ 4U height (1U equals 1.75, approximately 44.45mm), 19-inch width, because of its shape resembles a network switch, so called rack servers. Therefore, rack server may be considered compatible with 19-inch industrial standard products, its appearance in accordance with 19-inch standard structure design, combined with 19 inch standard rack unity to meet data center server intensive deployment needs, and also helps improve the appearance within and outside of the Cabinet.

Rack server design guidelines is to save space, Unified Modelling. The ability to add multiple servers to a Cabinet, not only can you take up less space, but also for unified management.

In the data center, the height of the Cabinet, 42U General is (2 meters), a cabinet can often accommodate 17 sets rack server (1U high server, each 1 servers equipped with 1 block pallet or 1 horizontal jumper Manager). Each server's information point number according to the number of network adapters, generally not more than 2 electric port and 1 optical port.

As far as this can calculate, for installing the rack server cabinet array, each cabinet General information number is 17 × 2 = 34 electric port, 17 × 1 = 17 optical parallel (34 core fiber), 17 × 1 = 17 KVM.

1. install the blade's Cabinet

The blade is similar to the slot type of network device or card board telephone switch device. It uses one dedicated blade chassis, under Server insert one of the functional requirements of plug-ins, using the blade combination of forming a desktop features of high-performance servers. It can therefore be said that the blade is DIY Assembly structure of the server. In accordance with the needs of server functions, the blade is divided into Server Blade, network, storage, Blade, blade management blades, fibre channel SAN blades, extended I/O blades etc, all kinds of "Blade" assume different features in the server.

It can be said that the blade server trends must be from a simple "server consolidation" development to integrate enterprise storage, network and switching equipment of core components. At the same time, since multiple dispersed server management will focus on a single server, it will significantly reduce IT management costs, enable simplified IT infrastructure, to improve management efficiency.

For wiring plan designer, the blade's greatest advantage is that each server chassis (3U-7U) only has one set of network interfaces, and, of course, also may have 1 set in hot backup status of network interfaces.

Suppose a server in a 3U chassis equipped with 1 network blade, the blade is equipped with two electric port (RJ45) and 1 optical parallel (multimode fiber or single-mode fiber interface), then this can be worked out: for 1 installation 3U Blade (each server is equipped with 1 level jumper Manager) Cabinet, each cabinet can install 9 blade chassis, its general information number is 9 × 2 = 18 electric port, 9 × 1 = 9 optical parallel (18 core fiber), 9 × 1 = 9 KVM ports (each blade chassis only need 1 KVM).

2. each cabinet demand information point

Based on these calculations, you can generally identify each cabinet information points of demand:
R > standard server cabinet

Standard Server Cabinet information number is 6 × 2 = 12 electric port, 6 x 1 = 6 optical port, 6 x 1 = 6 KVM.

Rack server cabinet

Rack server cabinet information number is 17 × 2 = 34 electric port, 17 × 1 = 17 light mouth, 17 × 1 = 17 KVM.

Blade Server Cabinet

Blade Server Cabinet information number is 9 × 2 = 18 electric port, 9 × 1 = 9 a light bite, 9 × 1 = 9 KVM.

Server Cabinet information point parameter summary table

3. redundancy and backup considerations

-Datacenter redundancy and backup is often need to consider. In the server configuration, often two ways for network redundancy and backup:

Creation of the same network connection/network the number of blades.

Adding different media network connection/network. For example: electric port/multi-mode estuary, multi-mode mouth/single-mode optical port, single-mode optical port/electrical outlets and so on.

When there is a network of redundant design, the server cabinet information point number will increase.

4. horizontal jumper Manager role

For rackmount server or blade servers, each server has network port normally does not exceed 2 electric port, 1 x optical port and 1 KVM port may only have 4 jumper. However, one equipped with ten-bed rack server or blade server cabinet, the situation is completely different: it may be used for nearly a hundred root jumper!

If this nearly a hundred root jumper scattered over the server, or directly to the side of a vertical Groove, you can imagine the server side jumper will be huge for jumper cover to the server. Only the poor who led not see anymore, if you want to replace a root jumper harder, to shooting to fastening and tidy can make people enjoy almost become a dodo.

If you do not let the jumper to the side, but on the server, harness frame below the installation a horizontal jumper Manager, the jumper will only reveal the 20 ~ 30mm socket head and jumper cables part in almost all hidden to the Manager's internal, invisible or touch not to see the light, while also ensuring Server Cabinet's appearance, you can easily replace the jumper also protects the jumper itself. So why not do a good thing?

Not willing to use the patch manager there are two broad reasons:

Occupied part of cabinet space

High density point: each jumper Manager takes 1U height. For rackmount servers, this is equivalent to 1 1U rack servers, which can be considered the height of the Cabinet of half the space of the "white" is wasted, even if the blade enclosure and one-quarter of the space is occupied as Manager. If you can use all the space, the Cabinet of utilization will greatly increase, you can create more value, more profitably.

Reasonable layout views: horizontal jumper Manager will occupy part of space, but the consumption of these spaces is worth it. In an office layout, more and more designers tend to 10 square meters/person office space, if there is any Office is 4 m 2/person office space, that would be asked: why desk size so small estates where the Cabinet? how do I get to the desk ... in fact, the intelligent construction the pursuit of psychological comfort and physical comfort, the room becomes more and more spacious, storey become increasingly expensive, lighting becomes more and more of the whole thing …. So why not give the server cabinet some loose, attractive environment?

I agree with the latter view. The Cabinet is like a desk, some people like, some people like to put out. In today's society, beauty is the management level of a characterization of the form, for operation of the data center, if the Cabinet is very untidy, will scare off some potential customers; for their own use of the data center, if the Cabinet is chaos, so the door can only host room always on top off, lest they require time-consuming room finishing.

Space of rational use is the main points of the modern room planning, high-density use only is unbearable load can serve as a "last resort" as a means of emergency. Have you not seen: Airport expansion project is in the airport's traffic reached the design capacity of 75% of the time, who is seen are always crowd Seidel has a tight airport?

Spend more money

Save money by: horizontal jumper Manager is to spend money to buy. In the data center built towards the end of the project funds have basically to architecture, decoration, mechanical, electrical, equipment used, or even the overrun situation, so for those who do not affect the performance of things to do on the other.

Reasonable cost point of view: "good steel used in blade," this is the ancestral. The building of the city, in the decoration of buildings, in-room layout, a lot of money was used for appearance. Even in home decoration basic finishes, "soft decoration" became a family decoration with scenery line. If the horizontal jumper Manager can significantly improve the appearance of the Cabinet, this Fortune is the flower. In fact, even if they increase the fee for the data center cabling system, just added a trifle.

In short, in the comprehensive wiring system after 10 years of efforts, the information point performance test pass rate of 99% or more of the target, the next project objectives should be beautiful (observability) and ease of maintenance (dimension). In order to achieve this goal, the horizontal jumper Manager is one of the important implementation componentThe expansion of many processes are horizontal jumper Manager are inseparable.