Simon, I think you are too cautious. Has anyone seen network saturation yet?
Put your whole farm on the grid. You can always throttle back if you see a
problem but I suspect you won't. There are 6700 cpus on LCG now and the
network is not a limiting factor in the current data challenges. Perhaps I
should say that overall capacity isn't a problem. There could easily be
problems caused by the low rates you report slowing jobs down but they don't
fill up the network.
John
> -----Original Message-----
> From: Testbed Support for GridPP member institutes
> [mailto:[log in to unmask]] On Behalf Of Simon George
> Sent: 06 August 2004 10:17
> To: [log in to unmask]
> Subject: Re: data challenge network bandwidth usage
>
> For what its worth, my strategy is to start with only a small
> fraction of the farm available to the grid - say 20 CPUs.
> That way I hope to see a smaller network load which won't
> saturate anything and can be monitored. I can then estimate
> the impact of the full farm and if that does not alarm the
> RHUL network admin, I will bring in the rest of the nodes.
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