Here’s what I can gather. The MemoRight is 2x more the price of the Mtron. $32 per GB vs $16 per GB. I’m looking at NeoStore’s pricing to compute these numbers.
However, the MemoRight is 20% faster for reads and 25% faster for writes. Doesn’t make much sense to pay 100% more money for a 20-25% performance gain.
One thing to note is that the random write throughout might be 5x higher for this drive. The Mtron can only do 120 write IOPS but the MemoRight can do 500.
However, it might be a situation where you need to benchmark the drive.
At this point I’m not even considering switching. InnoDB’s CPU utilization turns out to be the bottleneck so upgrading our disk to a faster model doesn’t seem to make much sense.