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Proxmox and SSD issues (feddit.de)

submitted 1 year ago by user45612@feddit.de to c/selfhosted@lemmy.world

4 comments fedilink hide all child comments

I run a 4 node Proxmox cluster for a Student Council.

Since our shared storage started acting up I needed to move everything to local storage. Since our budget is quite limited I threw all the harddisks we had into the ProxMox servers.

My problem now is, that the performance of the SSDs (Sata ,250gb - 2tb , different Brands, Raid 1 ZFS, enough RAM) is horrible, like 50mbit/s max write speed for movies horrible.

My assumption is that the SSDs shouldn’t permorm much worse than they would in a Windows machine, but they do. What am I doing wrong?

The node with hdds runs just fine, similar SSDs in our truenas also ran fine.

top 4 comments

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[–] fox@lemmy.fakecake.org 4 points 1 year ago (1 children)

you're looking for zfs set sync=disabled which would bring performance back to acceptable levels. the alternative is using enterprise SSDs.

[–] user45612@feddit.de 1 points 1 year ago

I‘ll give that a try, thanks

[–] iuser@lemmy.world 2 points 1 year ago (1 children)

I once had a defective ssd in my proxmox raid which pulled down the performance. Have you checked the individual ssd if their rw speed is up to spec?

[–] user45612@feddit.de 1 points 1 year ago

I have not checked, i might do that. But since i have the issue on 4 different zpools that is unlikely