

My main concern here, in addition to everything in option 2, is that ZFS needs a lot of memory for caching. Right now I can dedicate 4 GB to it, which is less than the recommendation – is it responsible to run a ZFS pool with that?
Yes, you’re going to be OK.
In your typical “self hosting” scenarios you can safely stay well below the RAM recommendation - assuming you don’t have many simultaneous users and tasks.
ZFS does not actually need that much RAM for basic operation, but it can make very good use of it in medium/heavy load scenarios.




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