Dedicated server with NVMe Caching raid 1/10
Does this configuration make sense? I don't see a lot of ssd/NVMe caching solutions. It used to be prominent back in 2011ish when SSDs were expensive yet accessible but frankly I still consider them expensive in 2018 for large file storage.
So what's the down side to a 120gb NVMe Caching a server in raid 1 with 2x drives at 4tb or raid 10 with 4x drives at 8tb?
Enterprise grade spindle drives have never been cheaper. So it feels like a nice balance especially with raid 10 where you have high sustained transfer speeds and the cache can handle the quick small database access.
So why don't we see this more regularly? Or is this not considered LET enough
P.S. of course you could also get 32gb of extra ram only for data caching, but with current ram pricing that seems cost prohibitive vs NVMe Caching.
What's the real world gains here? I know @Francisco had considered it for his block storage solution that we're all waiting for? Perhaps he can give us a bit of insight into how it performs in large scale deployment?