Comprehensive wiring renovation scheme for a data center of Sina Network

Sina is the world's largest Chinese web portal, currently has more than 100 million registered users. In the 2008 Olympic Games, Sina webcast of the flow of the country ranked first. Sina Search is also one of the main Chinese information retrieval tools. These are the data center of Sina's capacity, transmission bandwidth and processing capacity put forward a high demand. Sina must continuously expand the existing network scale, the current Sina network in the country has built dozens of data centers. But Sina is also upgrading its original data center, given its operating costs. Sina, for example, has already replaced most of the server's hundred Gigabit Ethernet cards with thousands of Gigabit Ethernet cards, and is now in the transition to million trillion. In terms of core switching and routing, some of the original system of data center can not meet the existing needs, mainly reflected in two aspects, 1 of the original system capacity density reduced, occupy a lot of space 2 of the original bandwidth is not enough to use, so need to add new channels or increase the bandwidth of the channel. The Sina network of a data center of the computer room integrated wiring transformation is mainly in the replacement of the original core part, the purpose is to improve the utilization of space, while increasing the number of core fiber links. At the same time because the next generation of Ethernet network has been embryonic, so in the process of upgrading must also take into account the future development. The transformation is a model project, SINA domestic other data center room will gradually take this as the benchmark for transformation.

Fig. 1, the wiring area before transformation

The data center now has 2 floors, floors Three and two floors, with nearly 300 server cabinets per floor. One header cabinet is configured per 7-8 cabinets. Each floor has a core exchange and routing area (including the main wiring area). The horizontal wiring between the server cabinet and the header cabinet uses cat 6 twisted pair cable. The header cabinet is connected to the core exchange and the core area of the 2-storey floor through OM1 optical fiber. All optical wiring uses the 1HU height 24-core LC wiring frame, simultaneously also must configure the horizontal alignment frame. Such a structure greatly limits the bandwidth of the network. It also wastes quite a lot of space. In this process, Rosenberg based on the characteristics of the mainstream market products at the same time to promote the future of the next generation of Ethernet network capabilities, with the Sina network of the actual situation of the data center, proposed a transformation program.

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The renovation plan of floor two is basically to cancel the core exchange, route and main wiring area of the floor two, move the core equipment (Exchange and route) all to the floor three, instead, set up a converging point on the floor two. The uplink cable of the floor two header cabinet is connected to the main wiring area of floor three through the convergence point. Floor two of the column head cabinets are all using 12-core OM3 pre-connected Mpo-mpo optical cable uplink to the convergence point. The rendezvous point will be connected from more than 40 column headers. 500-core cable jumped to 4 144-core OM3 Mpo-mpo Optical cable, unified

One upstream link to the core main wiring area of floor three. The convergence point of the fiber-optic wiring using 5HU high density distribution frame. With the MPO panel, the original 2 cabinet space of the optical wiring, now use only 5HU height.

Fig. 2, the reconstructed wiring area

The third floor accommodates the transfer and routing of the two floors, as well as 4 144-core optical cables connected from the floor to the two uplink. At the same time, the original LC-LC OM1 optical cable replaced into mpo-mpo OM3 optical cable, the core wiring area of the original 1HU light distribution frame and 1HU horizontal alignment frame replaced with 5HU high-density fiber distribution frame. With MPO-LC fiber wiring module, the original need for 2 cabinets of optical wiring space, after the transformation in 1 cabinet can be resolved.

There are several benefits to this scheme, the first is the increase in bandwidth. The original OM1 fiber can only support million gigabit network, using the most commonly used 10GBASE-SR transceiver, the longest transmission distance of only 33 meters. After the transformation, the OM3 fiber +mpo connector is used to support the transmission distance of the 10GBASE-SR. and can be within 100 meters distance, support the future next generation 40G or even 100G ethernet. At present, switch manufacturers have introduced 100G Ethernet interface Board and 40G Ethernet network card. So Sina is very concerned about the technology of the next Generation Ethernet network. Special requirements for the transformation must be able to take into account the future development of the network.

The second is to save space, the original main wiring area using 1HU height of 24-core fiber wiring frame plus 1HU alignment device method, 2HU space only configured 24-core optical cable. After the transformation, the 5HU high-density fiber distribution frame can hold 288 cores of optical fiber with LC connector, such as the MPO Connector can reach 864 cores, and its own line rack. Greatly reduced the occupancy of the space. There is the use of pre-connected optical cable to bring many benefits.

Pre-connected optical cables can provide on-site more convenient and safer operation and installation. Pre-connected Plug and Play provides a more economical and secure solution than the on-site installation of the weld and grinding joints. Compared with the traditional welding method, the pre connection can save about 90% of the installation time. Greatly shorten the renovation of the computer room, to ensure that Sina can be the fastest speed of the transformation of the computer room into application. At the same time, pre-connected cable 100% of the factory test, as well as high reliability and high intensity of protection, but also reduce the future operation and maintenance of SINA network costs.

Rosenberg's program has been praised by Sina. and through rapid delivery and on-site service to ensure the duration and installation quality, and finally ensure that the data center of Sina's computer room on time to put into use.

Article: Rosenberg Asia Pacific Electronics Co., Ltd. Zhou Wei

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