Arguably the place to begin a Cisco UCS blade server journey would be with “Why Blade Servers”. ‘Blades’ are cool. There was “Blade Runner” (a cult classic) and the Wesley Snipes “Blade” movies, several TV series with ‘blade’ in the name, on and on; but for data centers and servers? Why blades? Where is the Blade Server TCO & ROI benefit that drives business decisions and therefore innovation and how do blade servers / chassis get there?
Blade servers have been around since about year 2000 and arguably came about as a way to make data center footprints smaller and reduce power consumption (reduced TCO). Nothing new here for blade enthusiasts. Rack servers were taking up more and more space and power in data centers. The concept of blades was brilliant, insightful and simple. Take as many common rack delivered functionalities (services) as possible, and package them together for delivery to a fixed group of servers. The easy targets for this were server power, cooling, and I/O (well, some I/O functions). To look at it another way, a blade chassis takes a data center rack with servers, I/O cables and switches, then shrinks them into a ‘building block unit’. Once you have the ‘unit’, put a single sheet metal wrapper around everything and voila, a blade chassis. Overly simplistic I know, but a close enough visual. If you want a step-by-step evolution, Sean McGee (a colleague of mine here at Cisco) did a darn good overview The “Mini-Rack” Approach To Blade Server Design.