Application of High-Density Optical Fiber Links in data centers

Data CenterThe current device will be organized and divided into different functional areas:ServerZone, storage device zone, central switch zone, router, and high-performance Cluster Computer zone. This sort of arrangement will be slightly helpful for the growth of service requirements, the structural design of power supplies and cooling systems.

As you can imagine, physical space is very difficult to increase. The current structure can be more expensive to support such non-urgent needs. The data center will divide the area according to the function module. When there is a need to invest in new demand, this structure will not hinder the effectiveness of investment due to the passage of time.

Promote seamless connection

The interconnection problem on this infrastructure will affect the line "interconnection" requirement or "connection "). A long time ago, the role of the data center was connected to "Anywhere ". Many users want to access all services running on servers in the enterprise or wide area network, so they need servers to directly access the storage devices.

The core switch facilitates the connection of the backboard switch, but it also meansWiringThe interconnection between each module and each core area is required for each functional area. With the arrival of the largest capacity and longest cabling system, more lines and faster link speeds will be required as time increases.

In traditional solutions, when there are not many devices, from servers to switches and storage devices, individual persistent Jumpers are used for direct intercommunication. In a small Data Center, this is desirable. It has a relatively low cost and is feasible. However, when the applications of devices and data centers start to grow, this point-to-point direct jumper method will slowly kill a data center. Everyone has this experience. As time goes on, this noodle jumper will grow more and more.

Device changes and increases become increasingly difficult to control and manage. Due to the indirect storage loss, the performance and reliability of individual lines begin to decline. Finally, the available cabling space becomes congested and congested, seriously affecting the future application expansion. Today's Structured Cabling Design is gradually accepted by people. It is well adapted to the modular design ideas of data centers in the future, increasing manageability, reliability, and testability. However, it also brings about a relatively high initial construction cost and the additional loss caused by more connections in the cabling system.

When designing and constructing a structured Optical Cable cabling system, what are the inevitable problems? How many standards will there be? For optical cable, the answer will be clear: OM3 laser optimized 50um optical cable) can provide a relatively low total system price optical fiber cable with a laser transmitter ), supports enough devices and link lengths, and supports the 100 Gbits/sec protocol in the future.

The industry's OM4 standards have also been released. It is essentially an OM3 with higher bandwidth.Optical FiberTo support longer links and more applications. Because high-speed data applications usually use shorter lengths of existing links, you must plan the line structure and how to upgrade it in the future.

Detailed plan and calculation are required for the number of optical fibers. First, consider the data exchange structure and level of each equipment cabinet, and finally the level of each cabinet line, and the level of the set. Next, consider the type and density of the device to be used. However, there is no simple and easy answer. Based on known device types, such as blade servers, it is possible to design and provide the number of optical fibers in each cabinet. There are two key points to consider:

1. Confirm the total number of optical fibers required by each cabinet line, and configure the optical fiber usage of each cabinet that can be flexibly configured and changed in the future.

2. Plan the optical fiber line routing and the interconnected optical fiber distribution box to facilitate the addition of optical fiber cables on the Cabinets of each line in the future. For example, upgrading the processing capability from a 10Gbit link to a 40 Gb or GB means upgrading each link from a 2-core optical fiber to an 8-or 20-core optical fiber.

According to the development of equipment technology, it is difficult to provide advanced quantities of optical fibers from the very beginning. However, flexible optical fiber cabling systems can be used to support future requirements. In addition, increasing the number of optical fiber cables in the future will not significantly affect the overall cabling system. We recommend that you deploy at least 24-core optical fiber cables in each cabinet. For applications such as virtual computing, high-density blade servers, centralized Ethernet fiber channels, and 10g lines, it is a good choice to assign 48 cores or 96 cores to high-availability fiber distribution boxes in each cabinet. For more resources, please read:

Application of High-Density Optical Fiber Links in data centers

Application of High-Density Optical Fiber Links in data centers