With the continuous development of mobile Internet technology, the amount of data sent and uploaded by mobile Internet users reaches 1.3exabytes, which is equivalent to 10 of 18 parties. BigData "Big Data" is another subversive technological change in the TI industry after cloud computing and the Internet of Things. The amount of data generated in today's information age is so large that it cannot be collected, stored, managed, and analyzed using traditional tools. The amount of data generated globally has reached 1ZB in 2011 alone, and according to forecasts, global data storage will increase by 50 times in the next decade. Big data is not cloud computing, it is the soul and upgrade direction of cloud computing.
1. Network challenges in the era of big data
The number of hubs in the world is increasing. In 2007, only 0.1 devices per capita were connected to the Internet. By 2013, there were 7 per capita. By 2016, 3.6 million hours of video will be transmitted every 3 minutes, equivalent to all the movies produced worldwide. In 2010, among the global Internet traffic, the United States was 6337 PB/month, accounting for 31% of the world, and China accounted for 63% of the world. In 1998, a netizen consumed 1 megabyte of traffic a month, and the number in 2003 was 10 megabytes. In 2008, a monthly traffic to lG. By 2014, a netizen may have to go to 10G in one month.
In addition, the Internet of Things has been applied in more and more industries, and “Internet of Everything†is the ultimate goal of the Internet of Things. This part is the absolute increase in data traffic. The era of the Internet of Things will be that sensors automatically and massively transmit large amounts of data and store them in the data center through the network, which plays a role in promoting the storage capacity of the network and the data center.
The development of big data and network infrastructure is mutually influencing, restricting or facilitating. The increase of all data volume requires a larger data center to adapt to it. The wiring system as the data center internal connection and management infrastructure is all data circulation. The foundation plays a key role in supporting data center operations for big data streams. The cabling system serves as one of the basic physical platforms for building data centers.
2. Standardized development responds to big data
According to the 2012 version of the Data Center Telecommunications Infrastructure Standard, TIA942A is basically not involved in the virtualized network architecture. Based on the rapid changes of current network technologies, the network development of cloud computing virtualization will be an important development trend of large data center grid architecture. The network structure using non-blocking switching matrix is ​​a technical means to deal with the era of big data from the network level. one. In order to cope with the challenge of big data, the application of cloud computing virtualization network technology is an inevitable trend of technology development.
Faced with massive data storage for data processing, in order to improve resource utilization efficiency and data analysis and computing power, data centers will adopt a large number of technologies for virtualized cloud computing, including server virtualization technologies. The overall trend of the network architecture will adopt a large Layer 2 virtualized network. The core layer adopts 40G/100G, and the access layer adopts 10G mode, which has basically become the direction of network upgrade. In the virtual matrix data center backbone network, more will be upgraded from 10G network to 40G/100G. IEEE803.3ba has officially promulgated the network technology standard of 40G/100G in 2001. The data center backbone link is more than 88% less than 100m, and the multimode fiber 0M3/0M4 uses MTP and QSFP interface for multi-channel parallel transmission. Based on its good cost performance, it is considered by the industry to be the preferred solution for data center backbone link applications.
3. Support the analysis of physical layer interface technology of big data network
When the network backbone goes to the high-speed network of 40G/100G, the interface between the data center access layer device and the server network from 1000M to 10G is an inevitable trend. In the past, the network speed of the access layer was 1000M or less, and the interface mode using the copper RJ45 was dominant in the overall market. When the network rises to 1G0, there are a variety of interface models to choose from. There are many types of 10G interfaces, and the technical requirements are quite different. From the 10G interface type, based on power consumption, port density, support distance and other aspects, I believe that the CX4 copper cable solution does not have much advantage in the long run. The other four types, SFP ten DAC 10G passive copper cable, SFP ten AOC 10G active optical cable, SFP ten 10GBaseE-SR optical cable, RJ45Base-T copper cable solutions, each have advantages and disadvantages, here is not Explain in detail. Various 10G interface technologies are advancing, and the advantages and disadvantages of different periods have also changed. As for which technologies can get more applications in the market, it remains to be seen.
4. Technical application analysis of transmission media
Data centers are not the same as traditional buildings. For optical fiber, it is not only satisfied with 10M, 40G, 100G. The standard IEEE802.3ba has been officially promulgated. 40G uses 8-core fiber to transmit data, while 100G uses 20-core fiber. The pace of the IEEE working group did not stop there. After completing 802.3ba, it is making a backward compatible fiber standard from 10G to 100G.
Fiber optic applications in data centers use centralized and distributed methods for wiring management. In the next few years, institutional adjustments and application adjustments may require moving the server from the cabinet to another cabinet. One way is centralized management. When designing the horizontal line, instead of connecting to the head cabinet, all the lines are connected to a centralized management distribution area, where the jumper connection is completed from MDA to HAD, from HAD to EDA, and even from MDA. Jump directly to EDA, or EDA directly to EAD. All of this work is done in a centralized manner, without having to go to the server or reroute the line below, which is more attractive for some frequently changing applications. At present, for applications below 10G, adapters and jumpers can be used to complete the connection between the lines. In the future, upgrading to 40G/100G is also very simple. You can replace this adapter with an MTP or MPO panel.
Based on the background of the backbone network in the current data center mainly consisting of optical fiber as the transmission medium, TIA standardization organization has been developing a network based on resistance 100Ω and balanced twisted pair copper cable to support 40GBase-T. The draft standard has been issued, and the standard is expected to be in 2014. Formally implemented, the standard extends the copper twisted pair bandwidth to 2000MHz. RJ45 will continue to be used as an interface standard. The definition of copper cable is Cat.8, which can support 40GBase-T network transmission distance up to 30m, which basically meets the distance of 55% of data center 40G link. The application of 40G copper cable is an important supplement to the 40G standard. Although the distance is relatively short, it cannot become mainstream in the larger data center backbone. However, it is expected that the cost advantage of the copper cable solution will be a more advantageous solution for a large number of smaller data center constructions, which will help promote the application of 40G networks faster and more widely in the data.
5. Comparative analysis of electronic distribution frames
At present, there is no uniform international standard for intelligent wiring systems, so the design concepts of each company's products are not the same. From the hardware point of view, it can be roughly divided into port detection technology and link detection technology. We will do one from the performance. Simple analysis.
The port detection technique is that a micro sensor is built in the port. When a standard 8-pin jumper is inserted into either port, there is induction, and the connection jumper needs to establish a connection relationship in order. Port technology features common jumpers, easy deployment and maintenance, and automatic discovery of ports, as standard jumpers save maintenance costs. Port technology can easily upgrade a common non-smart patch panel to an intelligent patch panel. If a patch panel has been deployed and is already in use, the jumper is already full and the service is running. Even so Upgrade the wiring system online.
Link technology is characterized by the use of special jumpers that automatically discover unique jumpers, allowing both ends of the jumpers to be out of order.
The link technology requires more upper-layer devices to build a unique network group to form a management network to scan the electronic distribution frame to establish a database. If you want to expand, it is not enough to only add electronic distribution frames. You must add multiple layers to manage and scan the devices. Users must evaluate their own network and management points effectively and accurately to equip them with enough devices. If a special jumper link mode is adopted, although some functions can be implemented, many complicated upper layer device expansion and scanning are required, which is disadvantageous for expansion and deployment. In general, both technologies have their own advantages and disadvantages. The commonality of these two technologies is the use of an out-of-band management mode. Instead of using transmission media for 1 to 8 in twisted pair, it is added at the port or side. Sensing ability to determine the position of the jumper. Of course, there are other technologies for intelligent cabling, such as transmission line carrier technology. For example, the link technology is improved into some port technologies. It is believed that the intelligent wiring technology will further develop in hardware.
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