Speaker
Dr
Catalin Meirosu
(CERN and "Politehnica" Bucharest)
Description
The Trigger and Data Acquisition System of the ATLAS experiment is currently being
installed at CERN. A significant amount of computing resources will be deployed in
the Online computing system, in the close proximity of the ATLAS detector. More than
3000 high-performance computers will be supported by networks composed of about 200
Ethernet switches. The architecture of the networks was optimised for the particular
traffic profile generated by data transfer protocols with real-time delivery
constraints. In this paper, we summarise the operational requirements imposed on the
TDAQ networks. We describe the architecture of the network management solution that
fulfils the complete set of requirements. We show how commercial and custom-developed
applications will be integrated to provide a maximum of relevant information to the
physics operator on shift and enable the networking team to analyse trends and
predict the network performance. An active, application-driven, network
reconfiguration service will facilitate a rapid partial network topology change with
the aim of providing guarantees on the amount of traffic to be supported for a
particular data acquisition role (data taking, calibration, monitoring).
Primary author
Dr
Catalin Meirosu
(CERN and "Politehnica" Bucharest)
