Chapter 7. Block I/O

The I/O weight, within the range 100 to 1000.

Increasing the I/O weight of a device increases its priority for I/O bandwidth, and therefore provides it with more host resources. Similarly, reducing a device’s weight makes it consume less host resources.

A single string listing one or more device/weight pairs, in the format of /path/to/device,weight,/path/to/device,weight. Each weight must be within the range 100-1000, or the value 0 to remove that device from per-device listings. Only the devices listed in the string are modified; any existing per-device weights for other devices remain unchanged.

Add the --config option for changes to take effect at next boot.

Add the --live option to apply the changes to the running virtual machine.

Add the --current option to apply the changes to the current virtual machine.