Kvm

I use rsync to back up my workstation, including virtual machine disk images. Due to a known issue with sparse file handling during backups, rsync would expand sparse files, inflating an 11 GB disk image to its full 64 GB provisioned size on the backup server. To solve this, I converted the disk images to compressed qcow2 format: 1. Convert Existing Raw Images to qcow2 This also enables live snapshot support in virt-manager: ...

If you notice unusually high CPU usage on your KVM host while a Windows 7 virtual machine sits completely idle, remove the virtual USB tablet input device from the VM configuration. Once removed, host CPU utilization drops immediately. Reference: Debian Bug 672720