Internet + era What is important productivity, the answer is undoubtedly "big data", and the data center is the key to the success of big data strategy, need to constantly "advance with the times." Although 10G Ethernet has been the most economical and high-performance interconnect for data center server networks in recent years, it is accompanied by the explosive growth of cloud computing and the Internet of Things (IoT), coupled with the high throughput supported by server and storage solutions. The bandwidth of the data center needs to grow to meet the massive data flow needs of current and future clouds. The question facing the data center is: Is it the best solution to adopt 25G, 40G or 100G?
ODCC is the first to introduce the 25G ToR switch specification and has announced detailsWhile the industry is still keenly discussing whether 25G can set off the mainstream, there is no clear technical norm for 25G TOR switch products in the industry. China's ODCC (Open Data Center Committee) is the first to be distributed according to different business scenarios. The specifications of the 25G TOR switch have been formulated, and the reliability, flexibility, energy efficiency level, cost, etc. have been fully considered. The remote diagnosis and operation and maintenance functions have been enhanced, and the CPU platform and hardware platform have been unified. Details of the specification are recent. It has been published on the official website of ODCC.
Figure 1: Front view of the switch for one of the ODCC 25G ToR switch specifications
Yang Zhihua, head of the ODCC network working group, said: "The ODCC's 25G TOR specification is reflected in the network demand of China's Internet enterprise data center represented by Baidu and Ali. In the 25G industry, the hardware specification requirements for 25G TOR are clearly stated earlier. It also indicates the product development roadmap for the relevant OEM/ODM supplier. As the 25G network deployment progresses, the technical specification may be further refined or adjusted according to business needs."
The specifications of the 25G TOR are derived from the needs of some users who are in need of new technologies and have exemplary effects on other users. It is expected that the first batch of 25G network deployment in China will start in the first half of 2017, and larger deployments are expected to occur in 2018. Companies that offer large-scale IAAS cloud services are expected to deploy 25G networks more aggressively.
Yang Zhihua also pointed out: "Whether it is 25G network or other solutions, whether to adopt or when to apply depends entirely on the decision-making of each enterprise, but ODCC will conduct forward-looking technology through public meetings, salons, summits, public numbers, Weibo and other channels. And best practice advocacy, and launch more specific necessary technical and program discussions within the scope of ODCC members. ODCC welcomes industry chain partners to provide comments and suggestions."
It can be said that the introduction of this 25G TOR specification fully confirms the industry's unified recognition of 25G as the mainstream technology for future development. The introduction of the standard will greatly promote the overall upgrade of the data center to the 25G. The large-scale deployment and application in China can be foreseen.
25G becomes a 10G Ethernet batonWhy can 25G become a 10G Ethernet baton? Nicholas Ilyadis, vice president of portfolio and technology strategy at Marvell, analyzed that while it is possible to aggregate 40 10GbE physical channels to achieve 40G or aggregate 10 10G channels to run 100G speeds, these solutions are more expensive and consume more power than 25G. high. On the other hand, compared to 10G, the 25G solution has the advantage of enhanced computing and storage efficiency, providing a higher bandwidth, faster connection, and can run 50G for two 25G channels or 100G for four channels. Capital and operating expenses are relatively balanced when it comes to next-generation networks. Moreover, 25GbE is backward compatible and can communicate with 10G, so after adding a new server, it can still work with existing network devices.
“It can be said that the 25G easy migration, cost/performance balance, and real-time visibility of the network will drive the next generation of data to 25G to take advantage of its faster port speed and 25G cost curve,†concludes Nicholas Ilyadis.
Figure 2 25G Clos network structure
Stepping up the deployment of 25G technical specifications at home and abroad"Industry development, standards first." 25G is not only recognized as the industry standard for next-generation server access rate, but related technical specifications such as 25G TOR switches and AOC cables are in urgent need of “finalizationâ€. Domestic and foreign organizations are also actively “grabbing†to take the initiative.
From the perspective of the global data center industry, Chinese manufacturers are at the forefront, and Baidu and Ali are leading the way. Baidu has many large data centers and more than 400 domestic and foreign technology innovation patents in the data center field. It is the pioneer and leader of China's data center. According to the latest news, Alibaba Cloud has reached 14 data center nodes in the world. As a result, the ODCC (Open Data Center Committee) jointly sponsored by Baidu, Tencent, Alibaba, China Telecom, China Mobile, China Telecom and Intel, and Intel has become an important force for rapid rise. Marvell is an important member of the ODCC organization.
International organizations are of course also on the 25G "heart". It is reported that the Institute of Electrical and Electronics Engineers (IEEE) has introduced four new Ethernet standards for 25G and IoT applications. The new standard group includes IEEE802.3bp, IEEE802.3br and IEEE802.3b. IEEE802.3b introduces a full range of 25Gbps physical layer (PHY) specifications.
Marvell offers optimized "core" for 25G ToR productsThe technical specifications are basically "formed", is the most critical chip "present"? After all, in the process of upgrading to 25G, chip manufacturers largely determine the performance, stability and scalability of data center network, and the innovation of network chips can accelerate the evolution of data center networks. On the one hand, the transition from 10G to 25G, 50G and 100G is "expensive" and requires a thorough transformation of the port configuration, requiring a modular construction to support a wide range of port speeds. On the other hand, as bandwidth demand increases, further consideration is needed to reduce operating and capital expenditure costs.
Fortunately, after ODCC announced the 25G TOR switch specification, Marvell has taken the lead in launching the latest 25GbE switch chip Prestera 98CX84xx in October 2016. This series of chips supports the most popular configurations of the two 25G TOR switch port specifications just announced by ODCC: 48*25G + 6*100G, which can be said to provide optimal optimization of the mainstream ToR port configuration and excellent performance of 25GbE solution. Program. Designed for high-performance server applications in mainstream data centers, the 98CX84xx dramatically reduces the overhead costs of today's non-optimized 25GbE (ToR) switches. The Prestera device with integrated 25GbE PHY enables the data center to break the 1W bottleneck of each 25G port of 25G ToR applications, allowing the data center's computing and storage resources to get more energy supply, contributing more to reducing power consumption and cooling costs. In addition, Marvell has launched a complete solution for 25G applications. With this new solution, 25G deployment will be “easyâ€.
The latest devices will further enhance Marvell's leadership in high-performance, cost-effective and energy-efficient switch networking solutions. Yang Zhihua said: "We are very pleased that Marvell has introduced a chip solution that supports the 25G standard. It is expected that Marvell will contribute more to reducing the cost of 25G network and promoting more users to upgrade to 25G."
Figure 3 Marvell 25GbE Data Center Solution - More Optimized, Lower Cost Switch and Ethernet Transceiver
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