[ovirt-users] Backup prozess

Moin, We have in our Environment 12 servers managed by one self hosted engine. It is ovirt 4.3.9. We are Freizeit on that Version. How did you make Backups? We use a github Script which generate via api a snapshot and Mount this disk into the vm where the backup Script is running. The backup Script Export this additional Hard disk to a storage and disconnect the disk and remove the snapshot. This works on Linux vm fine if they have Medium load. If we try this with a Windows 10 vm or Windows Server vm or a Linux vm with high load or with a very big Hard drive this will not work. Disk can't Export and snapshot will not delete. I have found winchin and bareos but I have not start to check this first I want to have some more possible options. Thanks Marcel