For context, I’ve also been using ZFS since Solaris.

I was wrong about compression on datasets vs pools, my apologies.

By “almost no impact” (for compression), I meant well under 1% penalty for zstd, and almost unmeasurable for lz4 fast, with compression efficiency being roughly the same for both lz4 and zstd. Here is some data on that.

Lz4 compression on modern (post-haswell) CPUs is actually so fast, that lz4 can beat non-compressed writes in some workloads (see this). And that is from 2015.

Today, there is no reason to turn off compression.

I will definitely look into the NFS integrations for ZFS, I use NFS (exports and mounts) extensively, I wonder what I’ve been missing.

Anyway, thanks for this.