Nonhomogeneous queue depth calculation

For nonhomogeneous queues, use the following calculation.

Nonhomogeneous queues meet one of the following criteria:

One or more servers are allocated additional resources so that they can queue additional commands.
VDisks are not distributed evenly among the I/O groups in the cluster.

Set the queue depth for each VDisk on the servers using the following calculation.

For each VDisk, consider each server to which that VDisk has a mapping. This gives a set of server/VDisk pairs. If the sum of the server and VDisk queue depth for all of the pairs is less than 7 000, the server will not experience problems due to a full queue.