SSD ZFS Raid

[Dave42]

Hi

I want to set up a Raid 1 with 2 x4 TB SSD drives. As I understand Proxmox only supports Raid using ZFS and there more that a few suggestions that ZFS and SSD do not mix and it uses shed loads of memory!

Q. Is it a wise idea using SSD with ZFS to get the benefits of a raid 1

Q. Is there a better solution ??

The computer I am using came with a single ssd and has two empty sockets for extra ssd and has 64GB of memory

 

[leesteken]

Q. Is it a wise idea using SSD with ZFS to get the benefits of a raid 1

Yes, use (second-hand) enterprise SSDs with PLP and you'll also get the other benefits and features of ZFS.
There are already so many threads about ZFS, write amplification, QLC flash memory and Power Loss Protection on enterprise drives; please use the search with these or similar terms.

Q. Is there a better solution ??

There are alternatives like hardware RAID (preferably with BBU) or LVM or BTRFS. Also, see the manual: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#chapter_system_administration

 

[_gabriel]

there more that a few suggestions that ZFS and SSD do not mix and it uses shed loads of memory!

ZFS is slow and quickly wearout cheap/consumer SSDs because it writes many more data than actual data (overhead).
For memory load, current Proxmox VE intaller version limit ZFS ARC Cache to 10% of Physical Memory.

 

[alexskysilk]

ZFS is slow and quickly wearout cheap/consumer SSDs because it writes many more data than actual data (overhead).

everything is relevent relative to what you do with it. For homelab you're unlikely to "quickly" get to wearout, if ever.

it uses shed loads of memory!

It uses as much or as little as you allocate. If it makes you feel any better, I ran a 5 drive raidz on a 2006 vintage core2duo with 3GB of ram TOTAL. had no trouble saturating a 1gb ethernet link.