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# server off site zfs backup
* uses the `/root/zfs-send.sh` called from `/usr/local/etc/periodic/hourly/500.zfs-backup`
* the script is quiet, unless it is run from a controlling terminal for diagnostic purposes
* Uses the file `/var/db/backup/last-${backup_host}-${pool}` to determine which incremental backup to make
* when not present, will do a full backup