On 10/14/2018 09:51 AM, ~Stack~ wrote: > We do a pool of mirrored disks with fast SSD's for our ZFS caching. > Performance is fantastic and, as I mentioned in another reply, the > rebuild time of a failed drive (or a resilvering when I upgraded all of > the drives on the fly without downtime) is way faster than any RAID I've > ever worked on before (which is quite a few in my career). > That's interesting. I have no experience with SSD caching. > However, even if performance wasn't great we would still probably be > using it because of the tooling around ZFS. We utilize a lot of the > tools it provides for shared file-systems, backups, compression, > de-dupe, ect. > ZFS is super nifty, for sure :) I still have a small machine (Celeron J1900, 8GB RAM) running FreeBSD-11.2 from a two disk ZFS mirror. > Never used ZFS on *BSD. I've only used it on SL7 so I can't say anything > about an OS difference. I had a ZFS mirror on SL-7.4 earlier this year. It would occasionally have a minor problem - mostly stuff that would self resolve but it was still sort of surprising and a little worrisome that it would sometimes stumble or fall down. I've used ZFS on FreeBSD on and off for years, pretty much since the beginning - mostly simple setups on small machines, and it has steadily grown to be so reliable, in my experience, that I expect it and trust it to work like any other part of a critical infrastructure. The problem I recently discovered is that on a consistently busy machine it can consume a significant portion of the resources. So I went with SL and a hardware RAID over FreeBSD with ZFS. I'm curious to see how it plays out.