Data center now equipment will be organized and divided into different functional areas: the server, storage device, the center switch, router and high performance cluster computer area. This orderly arrangement, for service requirements for growth, power supply and cooling system design will somewhat help.

As you can imagine, physical space is very difficult to increase, now the structure can be more expensive to support these urgent needs. The data center will be in accordance with the function module partition region. When the need for a new demand of investment, the structure of the passage of time will not deter investment effectiveness.

Facilitating the seamless connection

Based architecture based on Internet issues will affect the line" interconnection" demand ( or " series "). In the very early days, the data hub is connected to" any place". Many users in the company or a wide area network to access to all the services running on the server, so the server can directly access to the storage device.

Core switch is to promote the backboard exchange forms of connection, but also means that the wiring is provided for each functional area, each module and each core region between the interconnection. Maximum capacity, the longest wiring system arrives, as time grows, will need to increase the number of lines and a faster link speed.

The traditional scheme, and the equipment is not too much, from the server to the switch and storage equipment, use individual long jumper to direct connectivity. In a small data center, which is desirable. It has relatively low cost and feasible. But when the equipment and data center application grows, this point forms of direct jumper will slowly kill a data center. All people have such experience as time grows, such as noodles jumper would be more and more.

Equipment change, increase becomes more and more difficult to control and management. As a result of indirect memory loss, individual line reliability and performance began to decline. Finally, the line laying space becomes crowded and obstruction, seriously affect the future application of the expansion. The structured wiring design, slowly began to be accepted by people. It is well adapted to the future data center of the modular design, added manageability, reliability and scalability. However, it also brings a higher initial construction costs and the need to pay attention to the wiring system for adding more connected after the additional loss.

During the design and construction of a structured cable wiring system, the inevitable questions were: use of the fiber optic cable? There will be many kinds of criteria? For cable problems, the answer would be clear : OM3 (laser optimized 50um cable) to provide relatively low total price (fiber coupled laser transmitter ), can support more than enough equipment and link length, and the bandwidth to support future 100Gbits / sec protocol.

Industry OM4 standards have been issued. It is essentially a more high bandwidth OM3 fiber support longer link and more applications. Because of the high speed data applications often use the existing link length is shorter, so must plan the line structure and how the future upgrades.

Fiber quantity demand requires detailed plans and calculations. First, consider each equipment data exchange structure and level, each row cabinet level, and set the level. The second is to consider to use equipment type and density. However, this is not a simple and easy to answer. Based on the known types of devices (such as blade servers ) is possible to design and provide fiber in each cabinet quantity. There are two points to consider :

1 confirmed each row cabinet needed total fiber number and configuration of a later in the day can be flexible configuration and change of each cabinet fiber usage.

The 2 planned by interconnection of optical fiber line and optical fiber distribution box, to facilitate future in each row of the cabinet to increase fiber. For example, processing capacity from 10Gbit link to upgrade to 40G and 100G, means that each link from the use of 2 core fiber is upgraded to 8 or 20 parallel cores of the fiber.

According to the equipment technology development, it is difficult to begin to provide advanced amount of fiber. But the use of flexible fiber optic cabling system to support future needs, and increases in the future fiber number for the whole wiring system does not produce too big effect, it can be done. Suggested minimum in each cabinet is arranged in the 24 core of the optical fiber. For virtual computing, high density blade servers, centralized fiber channel over Ethernet, 10G line applications, each cabinet is arranged in 48 core or 96 core to the high availability of optical fiber distribution box is a good choice.

Dangerous jumper

The most basic and essential component, jumper, is a very easy management system, but it may also be the most complex and the most troublesome thing. Usually the question is this: the jumper and the other end is in there? If ( jumper) no plug will have bad effect? I want to how or where can provide new line?

An improved labelling and file system, is the first important thing, but most of the jumper, especially in high density application area, often to the user logic control.

Port density will be suitable for optical fiber interface type and restrictions, the SFP fiber optic converters, and duplex LC joint, has decreased in recent years optical fiber volume and fiber density is increased by two times. Relative, the standardized connector has been the cable diameter volume from the 3mm became 2mm even more. But now, we have too much fiber jumpers, they all have some difficulty, cause comes from the site of the problem caused by bending is becoming more and more serious. Fortunately, a new, flexible, for the bending insensitive optical fiber appeared, and can well solve the problem.

An additional method is the use of Harness combined optical fiber jumpers. It can put the 6 Jumper Size volume concentration to a 3mm cable. When to use more Harness jumper, it also can reduce the switch interface connected to the jumper size, making it a better access and cable of the trend is very clear, management is more easily. Using the industry standard MPO connector, in the same volume of dual core LC splice case, one end of the Harness jumper can be very good to improve the density and reduce the jumper cabinet lines interconnecting the use of space. The next generation of parallel optical transmission rate of 40G and 100Gbit / sec, will use the MPO structure of the laser light source interface.