Ah, it's a classic. And wow, Brendan Gregg looks so young. And video uploaded by Bryan Cantrill himself. Damn it SUN had so many superstars yet it's Oracle that survived.
Brendan is senior performance architect at Netflix http://www.brendangregg.com/bio.html
Bryan is the CTO at Joyent, a cloud computing pioneer recently acquired by Samsung. https://www.joyent.com/about/management/bryan-cantrill
Not a criticism of your statement, just an opportunity to point that out.