Today, distributed computing has become increasingly fragmented, and even some people think it is confusing. With the development of the network, the network structure of the data center has become the most important factor in deciding whether an application can run well. If dozens or hundreds of servers in the communication between the data center, unpredictable rate, the bandwidth is not large enough to receive and send data, but also high-delay, meaning that the absence of these servers.
Therefore, the network has become a difficult thing to create. Like then, like Facebook, Facebook has a huge distributed PHP application (which contains a large number of machine learning) - It may be 2.3 billion users worldwide through 15 data centers millions of servers connected together, and the network with the passage of time and the development of a social network to meet the required business performance, flexibility and cost targets. Ethernet 10Gb / s and 40Gb / s, the network Facebook has been the overall IT budget in the fastest growing segment, mainly due to the bandwidth and port counts on the switch ASIC are limited, and not just bandwidth. But with the advent of the commercial market the latest generation of switch ASIC, the number of ports and bandwidth of each port uptrend, Facebook now has an unprecedented opportunity to adjust their networks to cut costs radically, and can have a lot more than better performance of the previous generation switches.
As we pointed out, the data center key is not to increase the cost of bandwidth, but in the early 100 GB / s switch radiating performance is not good, expensive, and subject to restricted port. The number of ports 200 GB / s or 400 GB / s switch port ASIC's appearance means that each switch can / s switch increases than the earlier 100 GB doubled to four times as large enterprises need to invest more in the pipeline connection, only network architectures need to reduce the number of layers and the number of hops, while still more than 10 million servers and storage servers in a single architecture.
This bandwidth use high base - just a fun statement, switch manufacturers use chipsets progress brought about by the extra bandwidth, the more ports can run at a set speed. Broadcom announced a year ago that "Tomahawk-3" StratusXGS ASIC, it supports 32 running at 400Gb / s port or 128 running at 100Gb / s ports. Last October, Arista Networks introduced 7060X switches based Tomahawk-3's.
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