I'm reading the ezvzdump document which contains the ezvzdump script. The document name is: Backup_a_running_container_over_the_network_with_ezvzdump
When analysing I noticed that it's missing the rsync option --numeric-ids to remain the ID's when syncing. It's especially important for the remote rsync line:
${RSYNC} ${LOCAL_DIR}${VEID}/ ${REMOTE_HOST}:${REMOTE_DIR}${VEID}/
Other rsync lines are local rsync commands. Also the tar is nicely using --numeric-owner. This again alerted me that rsync should also use --numeric-ids option to remain the user/group ID's and not translate to destination host names.
I didn't test it and it's theoretical.
So I'm not sure and please when reading, do not yet implement in production as it's just a concern and might be an invalid one.