Speaker
Dr
Roger JONES
(LANCASTER UNIVERSITY)
Description
The ATLAS Computing Model is under continuous development. Previous exercises
focussed on the Tier-0/Tier-1 interactions, with an emphasis on the resource
implications and only a high-level view of the data and workflow. The work presented
here attempts to describe in some detail the data and control flow from the High
Level Trigger farms all the way through to the physics user. The current focus is on
the use of TAG databases for access and the use of streaming at various levels to
optimise the access patterns. There has also been detailed consideration of the
required bandwidth to tape and disk, which then informs storage technology decisions.
The modelling draws from the experience of previous and running experiments, but has
also been tested in Data Challenges and will be tested in the LCG Service Challenge 4.
Summary
Latest progress on the ATLAS Computing Model is described, including required
requources, access and network bandwidths, streaming of data and organisation of
the access patterns.
Primary author
Dr
Roger JONES
(LANCASTER UNIVERSITY)
