Ok read the whole thread, you’re right, I wont benefit from L2arc, but I think i will benefit from a slog using the gen4 nvmes, based on some reading I did here
https://jro.io/truenas/openzfs/#sync
Those Gen4 nvmes are way faster than my platter spinners and I will be using samba (async writes) and nfs (synch writes). What do you think?
What’s your workload? if all you do is connect to truenas via smb then a slog won’t see use because smb is asyncronous by default (except on mac if im correct) and a slog would only help with sync writes, e.g. nfs or iscsi…
audio editing, movie and audio streaming, file shares
edit: was planning on setting sync=always, to prioritize data integrity, hence me leaning towards a slog instead.
If it’s done via smb then the slog won’t see any use
If you’re not storing VMs or databases, forget the SLOG and disable sync writes, including on NFS shares.
The NFS protocol in itself does not require sync writes; but its historical use to store parts of Unix filesystems and users’ home directories across the campus favoured integrity above all, hence sync writes. If your use is different, change the default behaviour accordingly.
