VM Disk - ZFS or LVM

[apap]

I tried to read the wiki and old threads but I still have questions.

Basic condition:
My PVE server is RAM limited (16GB non-ECC).
PVE is running on 2 x 120GB SATA SSD
Storage is 1 x 8TB SATA HDD, will add another 8TB HDD for Mirror in the future.

1. ZFS question:
Other posts have said that ZFS requires 1GB of ram per TB of storage. Does this mean creating a Mirror of 2 x 8TB disks require 16GB (or is it 8GB) of RAM just for ZFS?

2. LVM question:
Given the limitation on RAM above, is LVM a better choice? Other have also said non-ECC memory on ZFS is a bad idea. This gives more weight to LVM. Would you agree?

3. Adding a 2nd HDD later for Mirroring:
I suppose both ZFS and LVM will allow me to add a 2nd HDD at a future date for mirroring.

Thank you

 

[guletz]

1. ZFS question:
Other posts have said that ZFS requires 1GB of ram per TB of storage. Does this mean creating a Mirror of 2 x 8TB disks require 16GB (or is it 8GB) of RAM just for ZFS?

This is a very large aproximation! By default, ZFS will use 50% RAM.

2. LVM question:
Given the limitation on RAM above, is LVM a better choice? Other have also said non-ECC memory on ZFS is a bad idea. This gives more weight to LVM. Would you agree?

non-ECC is a bad idea for ANYthing, not only for zfs. But yes sometime you can not afford to have ECC Ram.

3. Adding a 2nd HDD later for Mirroring:
I suppose both ZFS

Yes, for zfs. I do not use LVM

Good luck / Bafta!