Cloned from launchpad blueprint https://blueprints.launchpad.net/nova/+spec/volume-affinity-weighter-function.

Description:

To reduce latency it may be desired to try to place an instance on a host which contains a volume assosiated with this instance. This can be done implicitly with a specific weighter function enabled, which takes into account volume affinity. This will result in an instance scheduled anyway whether the host with the volume was available or not.

Specification URL (additional information):

None