qemuxml2argv-blkdeviotune.xml

<domain type='qemu'>
  <name>QEMUGuest1</name>
  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
  <memory>219100</memory>
  <currentMemory>219100</currentMemory>
  <vcpu>1</vcpu>
  <os>
    <type arch='i686' machine='pc'>hvm</type>
    <boot dev='hd'/>
  </os>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/qemu</emulator>
    <disk type='block' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source dev='/dev/HostVG/QEMUGuest1'/>
      <target dev='hda' bus='ide'/>
      <iotune>
        <total_bytes_sec>5000</total_bytes_sec>
        <total_iops_sec>6000</total_iops_sec>
      </iotune>
      <address type='drive' controller='0' bus='0' unit='0'/>
    </disk>
    <disk type='block' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source dev='/dev/HostVG/QEMUGuest2'/>
      <target dev='hdb' bus='ide'/>
      <iotune>
        <read_bytes_sec>5000</read_bytes_sec>
        <write_bytes_sec>5000</write_bytes_sec>
        <total_iops_sec>7000</total_iops_sec>
      </iotune>
      <address type='drive' controller='0' bus='0' unit='1'/>
    </disk>
    <controller type='ide' index='0'/>
    <memballoon model='virtio'/>
  </devices>
</domain>