to the ``qemu``
`qcow2 cache docs <https://git.qemu.org/?p=qemu.git;a=blob;f=docs/qcow2-cache.txt>`__
- **Example:**
-
-::
-
- <disk type='file' device='disk'>
- <driver name='qemu' type='qcow2'>
- <metadata_cache>
- <max_size unit='bytes'>1234</max_size>
- </metadata_cache>
- </driver>
- <source file='/var/lib/libvirt/images/domain.qcow'/>
- <backingStore type='file'>
- <format type='qcow2'>
- <metadata_cache>
- <max_size unit='bytes'>1234</max_size>
- </metadata_cache>
- </format>
- <source file='/var/lib/libvirt/images/snapshot.qcow'/>
- <backingStore/>
- </backingStore>
- <target dev='vdd' bus='virtio'/>
- </disk>
+ **Example**::
+
+ <disk type='file' device='disk'>
+ <driver name='qemu' type='qcow2'>
+ <metadata_cache>
+ <max_size unit='bytes'>1234</max_size>
+ </metadata_cache>
+ </driver>
+ <source file='/var/lib/libvirt/images/domain.qcow'/>
+ <backingStore type='file'>
+ <format type='qcow2'>
+ <metadata_cache>
+ <max_size unit='bytes'>1234</max_size>
+ </metadata_cache>
+ </format>
+ <source file='/var/lib/libvirt/images/snapshot.qcow'/>
+ <backingStore/>
+ </backingStore>
+ <target dev='vdd' bus='virtio'/>
+ </disk>
``backenddomain``
The optional ``backenddomain`` element allows specifying a backend domain