One note about Deduplication. - DO NOT USE DEDUPLICATION
I know i recommended, under Part 1 - Datasets, to enable deduplication on some datasets. That advisement came from my interpretation of the manuals and general information floating on the web.
However, the advisement received on this forum was that deduplication is very resource intensive and usually not worth it. Please refer to Can i use a partition for a SLOG? for more information.
I also asked for additional information on the UrBackup forum but there has been several days since my original post and nobody has said anything yet. Please refer to ZFS Dataset deduplication in TrueNAS CORE if you are curious to see how that post is going.