Write amplification for OS only drives, zfs vs btrfs

[alexskysilk]

and you read all the issues with consumer drives

me? I'm not really aware of any careful with jumping to conclusions.

in all seriousness, technology isnt static. a lot of the issues present in earlier/older flash chips and controllers have been mitigated over the years. and wouldnt apply to your stated usecase in the first place.

 

[IsThisThingOn]

ZFS and you read all the issues with consumer

That is because ZFS allows for really bad setups with write amplification. Take notice that these problem cases are always some obscure RAIDZ1, QEMU instead of RAW, TrueNAS as VM, Windows Server with 30TB drive as a network share, cases.

It is almost never the "Proxmox with ZFS mirror boot and data disk, 16k default and RAW disk"

In my case I just want a pair for the os and will have separate drives for data.

If that is what you want for whatever reason, you do you.
That alone is more than what most homelabbers do.

if I can get enterprise m.2 ssd's vs consumer for about the same price then I will just use the enterprise stuff.

Sure, but you won't get enterprise for the same price.
You get really old enterprise for the same price as new consumer.

Not that there is even anything real enterprise that makes use of M.2

I have some pretty old intel 320's

These are some pretty bad SSDs. Which is totally fine for most workloads.
I would just make sure to not use two Intel 320 but mix in another bad drive from another vendor.
Just so you don't risk two mirror drives failing at the same time.

 

[Impact]

new consumer is can be even better for TBW than old enterprise

TBW isn't everything.


Source: https://www.proxmox.com/images/download/pve/docs/Proxmox-VE_ZFS-Benchmark-202011.pdf

 

[bishoptf]

TBW isn't everything.

View attachment 90111
Source: https://www.proxmox.com/images/download/pve/docs/Proxmox-VE_ZFS-Benchmark-202011.pdf

Yeah that document is pretty much what I had been reading, and while I know that is more talking about workloads for the VM's etc they are pretty much adamanet about not using consumer grade stuff. Again I think I am going to go with the dell boss cards with the m.2 ssd's. Looks like Dell used, Intel s4510 and Micron 5100/5300 cards, all were good cards. My only concern with the dell boss card is seeing the individual m.2 ssd's from the OS. I think I will have to load dell omsa to see that information but need to get one and poke around.

 

[IsThisThingOn]

TBW isn't everything.

You are right, performance might also be a thing in a homelab.
And this PDF proofs my point even further.

While the Samsung SM863 is a "server grade SSD", it is almost 10 years old and gets outperformed in many metrics by basically all existing (none QLC) consumer drives on the market But on a serious note, that linked PDF only tests 4k sync writes.