You need to consider the impact of all the initiators accessing the storage array port when you are planning the configuration for a specific ONTAP system or a specific host that does not run ONTAP.
If your deployment includes more than one initiator on a target port, you need to consider the total number of commands sent to a target port by all initiators when setting the target queue depth.
Guidelines for specifying the appropriate target queue depth are as follows:
A value of 0 means that there is no limit on the outstanding commands.
You could then configure higher values for initiators likely to send a greater number of requests and a lower value for initiators likely to send a lesser number of requests.