Yeah I read about that stuff (putting the ZIL in a SLOG) on that ZFS on Linux documentation site before I set off on this journey but that's a bit hardcore for me I think! Is it something you have to do when you create the pool? I really messed up my first pool tbh, it's too late to do anything about it now but
- I used partitions instead of whole disks which is warned against in the "best practises" docs. I think it'll be ok, they're 4k drives so I wanted to make sure the partitions were aligned (and the partitions use the whole disks, I just arranged the start block to be aligned for 4k sectors) before I presented them to ZFS (this is before I knew about setting ashift=12 on creation).
- I didn't turn on compression. It won't be very beneficial to me with (99% videos) but it's very light on the CPU and I'm storing a lot of backed up Blu-ray discs as folders (not ISO's) so there's all sorts of playlists and text-y files that can be compressed. I turned compression on for the new pool and it saved me 6gb on a 983gb set of data woohoo.