Seeing the part in the guide about wanting roughly 1 GB RAM per 1 TB disk space, does that still hold true if you are planning to mirror drives instead of doing a RAIDZ setup? Not being a filesystem expert, I don't know if simplifications can be made that would reduce RAM usage due to the fact that the drives are duplicates of each other and there is no parity to calculate since I am not doing RAIDZ.
For an example:
2x - 6 TB drives mirrored with ZFS => 6 TB usuable space, 12 TB actual disk...
RAM requirement still 1GB per 1TB even if mirroring?
For an example:
2x - 6 TB drives mirrored with ZFS => 6 TB usuable space, 12 TB actual disk...
RAM requirement still 1GB per 1TB even if mirroring?