Evolution of the Data Center
{"Image DocumentName": "Evolution of the Data Center", "Image ImageDescription": "Once, Campus-class was good enough. Traditionally: The North-South to East-West ratio has been 80:20. What this meant: Most traffic traverses multiple Switch hops \u2013 Access / Core / ToR / Core / Access. Uplinks more important than cross-rack capacity. The Data Center is in evolution. Historically, the Data Center, was pretty much just a glorified extension of the Campus network; certainly more intense, but we used the same Campus-class products in much the same way. Also, applications were designed in such a way that the client would typically interact with one or at least very few hosts; there might be an application server that front-ended a database server, however transactions were relatively simple and straightforward. This meant that traffic predominantly flowed in a north-south direction, from Client to server and back again \u2013 request and response. From the networking perspective, the most crucial aspect of the Data Center topology was the Core, and its links (the capacity) to the Campus, and then the fan-out to the servers; Top-of-Rack switching \u2013 as a defined niche \u2013 was in its infancy. However, the Data Center is in evolution. Factors driving the transformation of enterprise Data Center networks include the transition to composite application architectures, an adoption of business operations intelligence applications (based on communications- enabled business processes and complex-event processing), and an increase in live virtual machine migrations. With each factor creating a unique challenge for the Data Center network, ranging between sensitivity to latency and loss, increased traffic levels (background noise), and risk of extended saturation of the common I/O connection, what\u2019s required is an agile, high-performance, latency-optimized networking solution that delivers exceptionally high performance. Top-of-Rack. Switches. Racked Servers.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}