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01-25-2012 09:45 AM
01-25-2012 09:45 AM
Hello
I have multiple LUN on my LEFTHAND P4000 san
What is the common values to I/O latency read and I/O wrtite for a lun?
and is there another statistic to manage in orfer to verify the good health of the san
thanks a lot
Solved! Go to Solution.
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01-30-2012 05:35 AM
01-30-2012 05:35 AM
Re: values to verify good I/Oon a lun
guess it all depends on what disks are feeding the P4000s.
I think the general rule is to have a que of 2 or fewer per 15k SAS disk, 1.5 or fewer per 10k SAS and 1 per 7.2k SAS/SATA.
Letency depends on the disk RPM too. Not knowing anything about your disks, I would say that if you see over 10ms latency you are seeing a performance problem.
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01-30-2012 08:37 AM
01-30-2012 08:37 AM
Re: values to verify good I/Oon a lun
sorry for the missing informations
i have 2 nodes
Each node had 8 disk SAS 15K
escuse me i didn't well understand what you mean by:
I think the general rule is to have a que of 2 or fewer per 15k SAS disk
can you explain in other termes ?
thanks a lot
nicolas
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01-30-2012 10:19 AM