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RAID vs. Software-defined storage (SDS)? (lemmy.world)

submitted 1 year ago by timewarp@lemmy.world to c/selfhosted@lemmy.world

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I got 4 20TB drives from Amazon around Black Friday that I want to get setup for network storage. I've got 3 descent Ryzen 5000 series desktops that I was thinking about setting up so that I could build my own mini-Kubernetes cluster, but I don't know if I have enough motivation. I'm pretty OCD so small projects often turn into big projects.

I don't have an ECC motherboard though, so I want to get some input if BTRFS, ZFS, TrueNAS, or some other solution should be relatively safe without it? I guess it is a risk-factor but I haven't had any issues yet (fingers crossed). I've been out of the CNCF space for a while but Rook used to be the way to go for Ceph on Kubernetes. Has there been any new projects worth checking out or should I just do RAID and get it over with? Does Ceph offer the same level of redundancy or performance? The boards have a single M.2 slot so I could add in some SSD caching.

If I go with RAID, should I do RAID 5 or 6? I'm also a bit worried because the drives are all the same so if there is an issue it could hit multiple drives at once, but I plan to try to have an online backup somewhere and if I order more drives I'll balance it out with a different manufacturer.

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[–] timewarp@lemmy.world 0 points 1 year ago

Thanks so much for the very detailed reply. I think at this point I'm conflicted between using TrueNAS or going all in and trying SDS. I'm leaning towards SDS primarily because I want to build experience, but heck maybe I'll end up doing both and testing it out first and see what clicks.

I've setup Gluster before for OpenStack and had a pretty good experience, but at the time the performance was substantially worse than Ceph (however it may have gotten much better). Ceph was really challenging and required a lot of planning when I used it last in a previous role, but it seems like Rook might solve most of that. I don't really care about rebuild times... I'm fine if it takes a day or two to recover the data as long as I don't lose any.

As long as I make sure to have an offsite backup/replica somewhere then I guess I can't go too wrong. Thanks for explaining the various configurations of Gluster. That will be extremely helpful if I decide to go that route, and if performance can be tuned to match Ceph then I probably will.