Guidelines for specifying the appropriate target queue depth

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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:

  • Do not configure a value of 0 (zero).

    A value of 0 means that there is no limit on the outstanding commands.

  • Consider the volume of commands that specific initiators would be likely to send to the target port.

    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.

  • Configure hosts that do not run ONTAP according to the guidelines provided for those hosts.

  • Consider setting the target queue depth on a per-target-port basis when workloads differ across ports.