Our setup is Suns with local apps and a Linux server that holds all
the data. We had a big increase in speed after changing to Gigabit
Ethernet. I/O speed over our Intranet is still not ideal however.
Example: a chown command on a served directory is very slow compared
to the same command executed on the same directory for the server. We
suspect the overhead from NFS. We speculate that thin clients are the
way to go in the future to improve performance by avoiding the NFS
overhead. Does anyone have opinions on this?
-- IV
On Thu, 6 Jan 2005 07:11:10 -0800
Matthew Brett <[log in to unmask]> wrote:
> Hi,
>
>> That depends on how many analysis is done and the size of the fMRI
>> dataset. We tried running 3 analysis on a fast dual-processor
>>machine
>> recently and find that there is a bottleneck on NFS @1Gbps.
>
> That's interesting; we didn't notice much extra slowdown for 6
> processor machine running 6 realignment jobs on a 100 Mbs network.
> This was an Alpha machine with processors running at rough
>equivalent
> of 2 GHz Pentiums I suppose. Did you do any direct timings by any
> chance, comparing NFS to local hard disk? Did you saturate the NFS
> bandwidth?
>
> Best,
>
> Matthew
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