Hi,
We've been seeing a few ATLAS users submitting analysis jobs to our site
directly, rather than via the pilot systems.
The problem with is that the users may not necessarily know which access
method to use at any particular site. The jobs we've seen have been using
direct RFIO access and even a small number of jobs are either saturating the
IOPS on the pools (small buffers) or saturating switches (big buffers).
This is with only a relatively small number of jobs, a site full of them
would simply grind to a complete halt for days and be an enormous mess for
all concerned.
Is there any way of getting around this other than ticketing every single
user that does it (or fixing ATLAS AOD read patterns ;0)?
John
--
John Bland [log in to unmask]
System Administrator office: 220
High Energy Physics Division tel (int): 42911
Oliver Lodge Laboratory tel (ext): +44 (0)151 794 2911
University of Liverpool http://www.liv.ac.uk/physics/hep/
"I canna change the laws of physics, Captain!"
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