Make ZFS backups with rsync because of some reason. Usually its not good idea but hey maybe comes useful..

rsync_zfs_backup.sh

#!/bin/bash

# Crontab Entry - use flock to prevent duplicate running
30 3 * * 1 /usr/bin/flock -xn /root/logs/rsync_lock -c /usr/local/bin/rsync_scripts/rsync.sh >/dev/null 2>&1

# Resume broken network connection.
while [ 1 ]
do
    rsync --log-file=/root/logs/rsync.log --verbose --delete --force --checksum --inplace --no-whole-file --update --append --archive --compress-level=9 --skip-compress=gz/zip/z/rpm/deb/iso/bz2/t[gb]z/7z/mp[34]/mov/avi/ogg/jpg/jpeg/lzo/rzip/lzma/rar/ace --acls --xattrs --compress --partial --human-readable --one-file-system --timeout=999 --exclude-from=/.rsync-filter -e "ssh -T -o ConnectTimeout=999 -o ServerAliveInterval=340 -c arcfour" /tank/drives/xxxxx/ serverxxxxx:/tank/drives/xxxxx
    if [ "$?" = "0" ] ; then
        echo "rsync completed normally"
        exit
    else
        echo "rsync failure. Backing off and retrying..."
        sleep 300
    fi
done