Speaker
Dr
Luc Goossens
(CERN)
Description
ATLAS is a multi-purpose experiment at the LHC at CERN,
which will start taking data in November 2007.
To handle and process the unprecedented data rates expected
at the LHC (at nominal operation, ATLAS will record about
10 PB of raw data per year) poses a huge challenge on the
computing infrastructure.
The ATLAS Computing Model foresees a multi-tier hierarchical
model to perform this task, with CERN hosting the Tier-0
centre and associated Tier-1, Tier-2, ... centres distributed
around the world.
The role of the Tier-0 centre is to perform prompt
reconstruction of the raw data coming from the on-line
data acquisition system, and
to distribute raw and reconstructed data to the associated
Tier-1 centres.
In this paper we report on the requirements, design and implementation of the ATLAS
T0 software suite that has successfully met this challenge, most
notably: TOM, the ATLAS T0 Manager and Eowyn, the job supervision
component shared with the ATLAS WLCG-based production system.
We also report on the ATLAS Tier-0 scaling
tests carried out in 2006/2007, whose goals were to evaluate
the ATLAS Tier-0 work- and dataflow model, to test the
infrastructure at CERN, and to perform Tier-0 operations
up to their nominal rates.
Summary
In this paper we report on the requirements, design and implementation of the ATLAS
T0 software suite, most
notably: TOM, the ATLAS T0 Manager and Eowyn, the job supervision
component shared with the ATLAS WLCG-based production system.
| Submitted on behalf of Collaboration (ex, BaBar, ATLAS) | ATLAS |
|---|
Authors
Dr
Armin NAIRZ
(CERN)
Dr
Luc Goossens
(CERN)
