Script to auto backup XEN VMs live to remote ftp /sftp

For XenServer 6.5.0 I need a solid script PHP(or other) to implement something like that: [login to view URL] to backup live vms without shutting them to a SFTP server or FTP (option) -all vms -a group of vms -one vm Interval can be different for all or for the group or one(configurable) No need for gui,but configurable by cli or easily modify variables inside the script It will be best if it use [login to view URL] or somthing to compress the images before backing up . Remote file titile format should contain vm name and date of backup assuming that remote sftp ot ftp became full because backups running for long time to remove oldest backup sets(if this is easy) Its very likely that similar could be found as an open source or ready [login to view URL] something simple is preferred i think