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What is queue length?


What is queue length?


I have some problem to define the Queue Lenghts over 1, 5, 15 minutes .
Someone can explain this concept to me?

Uwe Zessin
Honored Contributor

Re: What is queue length?

Well, as you have written in the disk array forum, I guess you are talking about the Queue Length or Queue Depth of a SCSI disk.

The SCSI protocoll allows an initiator (the server) to send multiple commands to a target (the disk or storage array) without waiting for completion of the first command. This allows the disk/array to optimize the data access by minimizing head moves.

Of course, you can send only so many commands to a device, because handling many outstanding commands requires
-- ressources on the server and
-- the storage device