This is an old revision of the document!
It's much faster than OmniOS with OpenZFS.
It's crazy not to!
http://napp-it.org/doc/downloads/optane_slog_pool_performane.pdf
Mount two M.2 800P as mirrored SLOG:
https://www.supermicro.nl/products/accessories/addon/AOC-SLG3-2M2.cfm