Speaker
Dr
Guido NEGRI
(CERN)
Description
Within the ATLAS hierarchical, multi-tier computing infrastructure,
the Tier-0 centre at CERN is mainly responsible for prompt processing
of the raw data coming from the online DAQ system, to archive the raw
and derived data on tape, to register the data with the relevant
catalogues and to distribute them to the associated Tier-1 centres.
The Tier-0 is already fully functional. It has been successfully
participating in all cosmics and commissioning data taking since May 2007,
and was ramped up to its foreseen full size, performance and throughput
for the cosmics (and short single-beam) run periods between July and
October 2008. Data and work flows for collision data taking were exercised
in several "Full Dress Rehearsals" (FDRs) in the course of 2008. The
transition from an expert to a shifter-based system was successfully
established in July 2008.
This presentation will give an overview of the Tier-0 system, its data
and work flows, and operations model. It will review the operational
experience gained in cosmics, commissioning, and FDR exercises during
the past year. And it will give an outlook on planned developments and
the evolution of the system towards first collision data taking expected
in Spring 2009.
| Presentation type (oral | poster) | oral |
|---|
Author
Dr
Armin Nairz
(CERN)
