I can't see FreeNAS moving away from ZFS but I can see SSD's becoming more and more common, until they are defacto.All-flash is a special kind of beast. It requires good quality hardware and adequate resources to work well.
The real 'limitations' (if you want to call it that) are with ZFS design (it wasn't designed for Flash). That being said, it works well when properly managed by someone that knows ZFS well. So naturally, FreeNAS10, FreeNAS11, etc will not be more "all-SSD friendly" as the issues are upstream with ZFS itself.
Well, you got his number for sure. But the flip side of this picture is that most NAS storage systems are always-on affairs, so the TLC NAND volatility issue probably isn't a big deal.so I can't wait to see what someone like Cyberjock says about it, considering he takes hyperbole and paranoia to a factor of 12
Sounds exactly like a job for regular scrubs. Which is, in fact, what Samsung's updated firmware now does internally.But the flip side of this picture is that most NAS storage systems are always-on affairs, so the TLC NAND volatility issue probably isn't a big deal.
Which, of course, brings us to the normal usage model for a real RAID controller with ZFS, and which will no doubt bring Cyberjock screaming in rage when I start discussing that. ;-)typical NAND flash controllers are quite similar to HW RAID controllers: they're presenting a large number of NAND die as a single, coherent and fast piece of storage.
It's been frustrating, but it's working well now. The problems ended up being other things. For months I battled VMWares NFS bug, and kept thinking it was the freenas server. Moving to iscsi file extents for vmware seems to have solved that.
We have a head unit and then an external jbod of the 24 SSDs.
Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz
We had 256 gigs of ram and it acted all wonky. Ram tests were run for about two weeks and passed just fine. But we backed it down and it's been solid ever since. Reboots take forever for some reason. Probably because of ram tests at startup. We also had an stec zeus ram. But figured out we didn't need it and put it to use elsewhere. We have the drives setup up in mirrored pairs.
We also had problems with he Intel 10 gig nics when we were on freenas 9.2.x. We moved to the chelsio 10 gig nics and they work great.
The intel nics work fine in 9.3.x on some other boxes.
As for benchmarks, I haven't run any. That's a rabbit hole. But I'd be happy to run any benchmarks you'd like. Just let me know.
I do know it's bananas faster than 7200 RPM or 15k SAS drives. Stuff is fast and responsive. That's what really matters.
Also IX does not offer support for hardware not purchased from them. They will redirect you to a consultant.