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Anyone running ZFS? (lemmy.fwgx.uk)

submitted 2 weeks ago* (last edited 2 weeks ago) by [email protected] to c/[email protected]

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At the moment I have my NAS setup as a Proxmox VM with a hardware RAID card handling 6 2TB disks. My VMs are running on NVMEs with the NAS VM handling the data storage with the RAIDed volume passed through to the VM direct in Proxmox. I am running it as a large ext4 partition. Mostly photos, personal docs and a few films. Only I really use it. My desktop and laptop mount it over NFS. I have restic backups running weekly to two external HDDs. It all works pretty well and has for years.

I am now getting ZFS curious. I know I'll need to IT flash the HBA, or get another. I'm guessing it's best to create the zpool in Proxmox and pass that through to the NAS VM? Or would it be better to pass the individual disks through to the VM and manage the zpool from there?

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[–] [email protected] 1 points 2 weeks ago (2 children)

No idea why you're getting downvoted, it's absolutely correct and it's called out in the official proxmox docs and forums. Proxmox logs and journals directly to the zfs array regularly, to the point of drive destroying amounts of writes.

[–] [email protected] 3 points 2 weeks ago (2 children)

I'm not intending to run Proxmox on it. I have that running on an SSD, or maybe it's an NVME, I forget. This will just be for data storage mainly of photos that one VM will manage and NFS share out to other machines.

[–] [email protected] 1 points 2 weeks ago

Ah I'll clarify that I set mine up next to the system drive in proxmox, through the proxmox zfs helper program. There was probably something in there that set up settings in a weird way

[–] [email protected] -2 points 2 weeks ago

Yes I'm specifically referring to your ZFS pool containing your VMs/LXCs. Enterprise SSDs for that. Get them on ebay. Just do a search on the Proxmox forums for enterprise vs consumer SSD to see the problem with consumer hardware for ZFS. For Proxmox itself you want something like an NVME with DRAM, specifically underprovisioned for an unused space buffer for the drive controller to use for wear leveling.

[–] [email protected] 3 points 2 weeks ago

What exactly are you referring to? ZIL? ARC? L2ARC? And what docs? Have not found that call out in the official docs.