Glenn Fleishman: Quality of Servitude. Here's where I hope I represent Bob, David Reed, and David Isenberg's arguments correctly: it's better to focus on having more bandwidth than more intelligent networks. That is, forget about the fascist task of deciding that certain network traffic is more important than other network traffic. [Tomalak's Realm]
Here we have the most common and most simple misunderstanding of QoS: confusing it with "priority of service". PoS (what an apropriate acronym) is rightly criticized, since without any metric to bound priority everyone will be excessively motivated to set all of their connections to highest priority. And when everything is a priority, nothing is a priority.
What QoS really deals with is the differeing needs for different kinds of connections. SOme are high bandwidth, but some are low bandwidth yet are very sensitive to latency. Adding badwidth doesn't even guarantee that you'll handle the latter case better in a mixed environment, and even when it does it tends to be an overly expensive solution.
"Just add more bandwidth" always sounds like a nice solution when someone else is paying for your point to point links.
6:54:37 PM  Categories: Pushing rectangles...
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