Comment by 827a
1 day ago
It does have a dual NVMe cache; those in RAID-0 will saturate (e.g. I believe just one Samsung 990 Pro can write at just over 50Gbps).
The bigger risk is the CPU. This is an issue with the Ubiquiti UNAS Pro 8, their ~$800 USD 8 bay NAS. In theory it has 10gig networking. In practice the CPU physically cannot transfer bits fast enough, because its a dinky underpowered ARM CPU that they clearly chose to hit that quite affordable price point. Its a decent trade-off, because similar units from Synology are more like $1600, and you can meaningfully hit somewhere between 2.5gig and 10gig; but saturating 10gig is out of the question.
The ENAS has a beefier CPU so it might keep up with 25gig (could this do 50gig bonded?). But only testing will tell.
https://www.storagereview.com/review/ubiquiti-unas-pro-8-rev...
This says the UNAS Pro 8 can saturate 20gbe with reads. It won't with just a single user, though, so for homelab enthusiasts it's less attractive even though the price is appealing. But for an actual small business using it to serve a handful of people? The 10gbe isn't a waste
You can hit 10 gig aggregate on an A57 quite easily, given standard memory bandwidth (I've done it). They must be doing something stupid on the software side, like too many copies. Or if you're trying to shove 10 gig in one flow at 1500 mtu yeah that might be painful.
As I recall there were some people on reddit who got the UNAS Pro 8 up to 10gig, but yeah it was only through some level of software tweaks or network stack config or something. From the factory my understanding is that it struggles.