Earlier quoted context omitted.
My thoughts exactly. The article is quite inflammatory and tosses out some bold statements without really deep diving into them. My favorite: "Finally, the unpredictable latency of SSD-based arrays - often called all-flash arrays - is gaining mind share. The problem: if there are too many writes for an SSD to keep up with, reads have to wait for writes to complete - which can be many milliseconds. Reads taking as lon…
There is unpredictablilty in SSDs however, its most like whether an IOP will take 1 ns or 1 ms, instead of 10 ms, or 100 ms with an HD. The variability is an order of magnitude greater but the worst case is an is several orders of magnitude better. Quite simply no one cares that you might get 10,000 IOPS or 200,000 IOPS from an SSD when all you're going to get from a 15K drive is 500 IOPS
It's true that 99% of your IOs will see service time of below 1ms but it's the other 1% that really matters to avoid getting late night calls or even a mid-day crisis.