Cluster and RAID 5 Array bottleneck.( I believe)

[Jakob Østergaard]

On Thu, Mar 15, 2001 at 11:07:43AM -0600, Leonardo Magallon wrote:
> Hi all,
> 
...
> 
> When we start our job here, the switch passes no more than 31mb/s at any moment.

What  do you get from a standard local Bonnie benchmark, or a dd if=hugefile
of=/dev/null  ?

Before guessing whether the low performance is due to the network or the disks,
you should try to benchmark what your disks can actually deliver...

Do a netperf on the network as well, so you know what you can actually push
thru your gig-e.


> 
> A colleague of mine is saying that the problem is at the network level and I am
> thinking that it is at the Array level because the lights on the array just keep
> steadily on and the switch is not even at 25% utilization and attaching a
> console to the array is mainly for setting up drives and not for monitoring.

I would suspect the array too.  But I'm interested in hearing what your testing
shows   :)

-- 
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:   jakob at unthought.net   : And I see the elder races,         :
:.........................: putrid forms of man                :
:   Jakob Østergaard      : See him rise and claim the earth,  :
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