QDR switches are here, QDR switches are here!

(channeling Steve Martin in “The Jerk” when talking about the new phonebooks …) 40 Gb ports. $400/port or so. See InsideHPC.com for more. For any Voltaire folks reading this, feel free to fire over a loaner QDR switch and pair of cards. We would love to see if the pair of JackRabbits we are finishing up for a customer will in fact be able to saturate these links. The issue is usually that the buffer copies between the disk and network drivers is slow, so we see significant performance loss with SDR. Will be trying with DDR shortly, and hopefully, QDR as well. 40% of the way to 100 Gb. Woot!