There is a real problem with Samba performance in OES2018 SP1. Unfortunately the DSfW Server only supports Samba as SMB file server product.
Till OES2018 without SP1 one could use Samba to access NSS Volumes on the DSfW server to distribute settings, which one did not want to place on the SYSVOL as there is no real user rights differentiation possible.
Now you can do this as well, but suffer a network throughput of less than 1 kbyte/s. (If you access the same files through Novell client you get an adequate throughput.) So it is useless to put any NSS Volume on a DSfW server.