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May 31, 2013 - by rachelbalik
Latency caused by disk vibrations is a real problem, one that can be measured using DTrace. How do we know? Well, for one, Brendan Gregg proves it in this video by yelling really, really loudly. He made the original discovery using DTrace-based Analytics, which provided real-time latency heat maps. We do that at Joyent, too - with Cloud Analytics.