I'm a video designer and have a lot of rendering programs. I decided to buy a 120GB SSD in my PC, and I'm searching for the best performance. The important thing for best performance in SSD must be high IOPS, high 4k read/write value, MLC NAND flash, OK so far it's clear.
But what is queue depth (QD) 1,2,3...32? For example random read 4k-QD1, random read 4k-QD2, random write 4k-QD1, random read 4k-QD2... Which values of QD are important for me, because I do not have a server and I'm not a standard home user. And the important QD-X value must be at least how much for me?
Answer
QD is basically a measurement of how many threads are working on the SSD.
Most users will only hit a QD of 1 however in a server environment under intense IO load you can hit up to 64 or 128.
I would get something like this in whatever size you want.
http://www.amazon.com/Samsung-2-5-Inch-Internal-MZ-75E250B-AM/dp/B00OAJ412U/ref=sr_1_1?s=pc&ie=UTF8&qid=1457283469&sr=1-1&keywords=ssd
Here is a paper that talks about QD in length:
http://www.samsung.com/global/business/semiconductor/minisite/SSD/global/html/whitepaper/whitepaper08.html
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