A weigher function to make use of volume affinity. for OpenStack Compute (nova)

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 ...

A filter to avoid placing volumes on the same host for OpenStack Compute (nova)

It may be desired to make sure that cinder does not create volumes on the same host to which some specific volumes already belong. This can be achieved by introducing a filter for cinder scheduler which filters out hosts associated with those volumes.