Hi Jeremy,
> Did you mean specifically in the cloud context, or more generally (the direct) use of WNs?
Good point. I believe that CMS is planning to use nearly all CERN
resources as cloud resources. Specifically I am interested with job
efficiencies and data location. EOS offers a unified namespace across
both the Wigner and Meyrin instances so you don't know where your file
physically resides. Even if there are replicas at both sites you will
only pick the local copy **most** of the time not all the time. Now with
a 100Gb/s pipe you might think that this doesn't matter, however for
certain sorts of workflow and hence data access it matters a great deal.
For example CMS merge jobs take about 10 times longer if accessing
geographically remote data. So we are finding ways around these things
and I was wondering what other experiments were doing and what they were
finding.
Best,
david
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