On an XP512 (1Gb/sec) you should be able to have
250GB per card with no problems.

If you are using a A5158A 1gig hba they work but
are not supported on n-class. Only A6795A fiber cards
are supported.

Guy


> Goetz,
>
> Thank you for your response.
>
> Yes the 11% makes sense, I did over look that.
>
> And I did intentionally forget to mention the 6 fiber channels.
>
> But it does make sense now.
>
> So the question would be, Since a 1GB fiber card is indeed an overly fat
> pipe.  Would it be better
> to have 8 fiber channels or only 4?  Given that the ability of an N-Class
> box stressing an XP512
> through 4 channels is not very high.
>
> -Craig
>
>
>
> --- Goetz Neumann <[log in to unmask]> wrote:
>
>> Craig asks:
>>
>> > I continuely see these processes on the top of Glance.
>> >
>> > This is an N-class 550/300
>> >
>> > P2    SYS MANAGER.SYS         2 LOAD       B142  2.0%   0.0   0   0.0
>> MISC
>> > P3    SYS MANAGER.SYS         3            B100  1.7%   0.0   0   0.0
>> MISC
>> > P4    SYS MANAGER.SYS         4            A  0  4.2%   0.0   0   0.0
>> MSG
>> > P5    SYS MANAGER.SYS         5            A  0  4.4%   0.0   0   0.0
>> MSG
>> > P6    SYS MANAGER.SYS         6            A  0  4.4%   0.0   0   0.0
>> MSG
>> > P7    SYS MANAGER.SYS         7            A  0  4.3%   0.0   0   0.0
>> MSG
>> > P8    SYS MANAGER.SYS         8            A  0  4.4%   0.0   0   0.0
>> MSG
>> > P9    SYS MANAGER.SYS         9            A  0  7.1%   0.0   0   0.0
>> MSG
>> >
>>
>> > That's 32.5% overhead!
>>
>> It would be, if you had only 1 CPU . but you have 3 .
>> I.e. 'overhead' is ~ 11% .
>>
>> > Does anybody know what is happening?
>>
>> Pin 2 is LOAD.PUB.SYS used to load CM programs (FCOPY, DSCOPY ?)
>> and CM/SL library code of the OS or your applications.
>>
>> Pin 3 is pm_cleanup, used to clean the remains of dead processes
>> (like deleting the stack, heap, etc) from memory. 1.7 % might mean
>> you have a higher than usual process creation and termination rate.
>>
>> Pins 4..9  are different on 7.5 compared to earlier releases.
>> In very simple terms they are Fibre Channel's IO facilitating
>> processes (called PFPs  - port facility process) .  I do not
>> have ballpark numbers for what is "normal", it might simply be
>> that your system is doing a higher number of FibreChannel IOs,
>> or that something on your FC loop or SAN is very 'talkative'.
>>
>> If your DISC screen in Glance shows the system as IO idle,
>> and you still get >= 4% CPU per process (pins 4..9) _then_ I
>> would think something is not ok.
>>
>>
>> Goetz
>>
>> PS: 'posting via email (reply to the DIGEST), the new
>>       news gateway seems not operational yet?'
>>
>> * To join/leave the list, search archives, change list settings, *
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>>
>
>
>
>
>
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