queue_depth question

Solution Verified - Updated -

Issue

  • There was a statement on your web site as follows that was confusing about queue_depth.
"These requests can be configured per single Logical Unit Number (LUN) that is accessed, or based on the HBA"  

The word "OR" is confusing to me because I would think you would want to evaluate and set the queue_depth in both places, such as 128 on your HBA and 16 or 32 on your individual SAN LUNS. THE HBA you would want higher since all the individual LUNS send their I/O request through the HBA. Can you comment on this?

Environment

  • Red Hat Enterprise Linux (RHEL) 6.6

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