=item B<BlockDevice> I<name:dev>
+=item B<BlockDeviceFormat> B<source>|B<target>
+
=item B<InterfaceDevice> I<name:dev>
=item B<IgnoreSelected> B<true>|B<false>
Ignore all I<hdb> devices on any domain, but other block devices (eg. I<hda>)
will be collected.
+If I<BlockDeviceFormat> is set to B<target>, then the device names will be the ones
+in the I<target> node for the device in the XML definition of the domain. The
+default is B<target>. This is the behavior before adding the option.
+
+If I<BlockDeviceFormat> is set to B<source>, then the device names will be the ones
+in the I<source> node for the device in the XML definition of the domain.
+
+Example:
+
+If the domain XML have the following device defined:
+
+ <disk type='block' device='disk'>
+ <driver name='qemu' type='raw' cache='none' io='native' discard='unmap'/>
+ <source dev='/var/lib/libvirt/images/image1.qcow2'/>
+ <target dev='sda' bus='scsi'/>
+ <boot order='2'/>
+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+ </disk>
+
+setting
+
+ BlockDeviceFormat target
+
+will name the device in the graph as C<sda>
+
+setting
+
+ BlockDeviceFormat source
+
+will name the device in the graph as C<var_lib_libvirt_images_image1.qcow2>
+
+These names will also be part of the RRD filename.
+
+=item B<BlockDeviceFormatBasename> B<false>|B<true>
+
+I<BlockDeviceFormatBasename> - this option is honored if and only if
+option I<BlockDeviceFormat> is set to B<source>. If set to B<true> then
+only the last part of the path will be used for device name and naming the
+RRD file.
+
+Example:
+
+if the device path (source tag) is: C</var/lib/libvirt/images/image1.qcow2>
+
+setting:
+ BlockDeviceFormatBasename true
+
+will set the device name to: C<image1.qcow2>
+
=item B<HostnameFormat> B<name|uuid|hostname|...>
When the virt plugin logs data, it sets the hostname of the collected data