Backup utility for Libvirt / qemu / kvm supporting incremental and differential backups + instant recovery (agentless).

BackROLL is a KVM guest backup software

Backup KVM host and guests to external storage

kvm cold backup shell script, naive but always works.

QEMU/KVM Libvirt incremental backup using external snapshots

Back up your KVM images using rsync or virtsync

Exadata KVM

Script to back up and restore a data image with maximum compression (KVM & XEN)