Hi,
I'm trying to get a rough indication of the typical network bandwidth in
and out of a site during a LHC data challenge.
The network manager at our computer centre is concerned about the impact
that use of our LCG farm could have on the campus network and our uplink
to the London MAN, and she has reasonably asked me for some rough
predictions of the bandwidth usage we anticipate. Obviously this will on
how much bandwidth is available, farm size and load, etc.
I would be grateful if sites that have already experienced a data
challenge could feed back their experience of the network traffic that it
generates.
We have a farm size of ~ 75 nodes, 150 CPUs and our bandwidth bottleneck
is probably the 100 Mb connection from RHUL to the London MAN. If you
respond please comment on how your situation compares.
Cheers,
Simon
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Simon George, Dept of Physics, Royal Holloway college, University of London
Email [log in to unmask] Tel. +44 1784 41 41 85 Fax. +44 1784 472794
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