Some extra detail
Hi All, Dimitris from NetApp here.
It is important to note that Mr. Floyer’s entire analysis is based on certain very flawed assumptions. Here is some more detail on just a couple of the assumptions:
1. Time/cost of migrations:
a. The migration effort is far smaller than is stated in the article. NetApp has a tool (7MTT) that dramatically helps with automation, migration speed and complexity.
b. It is important to note that moving from 7-mode to a competitor would not have the luxury of using the 7MTT tool and would, indeed, result in an expensive, laborious move (to a less functional and/or stable product).
c. With ONTAP 8.3.2, we are bringing to the market Copy Free Transition (CFT). Which does what the name suggests: It converts disk pools from 7-mode to cDOT without any data movement. This dramatically cuts the cost and time of conversions even more (we are talking about only a few hours to convert a massively large system).
d. NetApp competitors typically expect a complete forklift migration every 3-4 years, which would increase the TCO! Mr. Floyer should factor an extra refresh cycle in his calculations…
2. Low Latency Performance:
a. AFF (All-Flash FAS) with ONTAP 8.3.0 and up is massively faster than 7-mode or even cDOT with older ONTAP releases. To the order of up to 3-4x lower latency. cDOT running 8.3.0+ has been extensively optimized for flash.
b. As a result, sub-ms response times can be achieved with AFF. Yet Mr. Floyer’s article states ONTAP is not a proper vehicle for low latency applications and instead recommends competing platforms that in real life don’t perform consistently at sub-ms response times (in fact we beat those competitors in bakeoffs regularly).
c. AFF has an audited, published SPC-1 result using 8.3.0 code, showing extremely impressive, consistent, low latency performance for a tough workload that’s over 60% writes! See here for a comparative analysis: http://bit.ly/1EhAivY (and with 8.3.2, performance is significantly better than 8.3.0).
So what happens to Mr. Floyer's analysis once the cost and performance arguments are defeated?
Thx
D