Re: ZFS ARC memory requirements

On Mon, 4 Mar 2024, Andrea Venturoli wrote:

>
> I read the rule of thumbs for RAM is 1GB per TB of storage, which would 
> possibly mean 192GiB!!!, but I also read this is argued upon.

We have a number of large ZFS stores used for both production and backup. 
Most have 64GB and that seems more than enough. We use compression, but do 
not do de-duplication. I believe the advice you have read accounts for 
de-duplication, which is memory-intensive.

Daniel Feenberg