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21-25 May 2012
New York City, NY, USA
US/Eastern timezone

Evolution of grid-wide access to database resident information in ATLAS using Frontier

22 May 2012, 17:25
25m
Room 802 (Kimmel Center)

Room 802

Kimmel Center

Parallel Software Engineering, Data Stores and Databases (track 5) Software Engineering, Data Stores and Databases

Speaker

Alastair Dewhurst (STFC - Science & Technology Facilities Council (GB))

Description

The ATLAS experiment deployed Frontier technology world-wide during the the initial year of LHC collision data taking to enable user analysis jobs running on the World-wide LHC Computing Grid to access database resident data. Since that time, the deployment model has evolved to optimize resources, improve performance, and streamline maintenance of Frontier and related infrastructure. In this presentation we focus on the specific changes in the deployment and improvements undertaken such as the optimization of cache and launchpad location, the use of RPMs for more uniform deployment of underlying Frontier related components, improvements in monitoring, optimization of fail-over, and an increasing use of a centrally managed database containing site specific information (for configuration of services and monitoring). In addition, analysis of Frontier logs has allowed us a deeper understanding of problematic queries and understanding of use cases. Use of the system has grown beyond just user analysis and subsystem specific tasks such as calibration and alignment, extending into production processing areas such as initial reconstruction and trigger reprocessing. With a more robust and tuned system, we are better equiped to satisfy the still growing number of diverse clients and the demands of increasingly sofisticated processing and analysis.

Primary author

Co-authors

Alastair Dewhurst (STFC - Science & Technology Facilities Council (GB)) Carlos Fernando Gamboa (Department of Physics-Brookhaven National Laboratory (BNL)-Unkno) Dr Dario Barberis (Universita e INFN (IT)) Dave Dykstra (Fermi National Accelerator Lab. (US)) Mr David Front (SW engineer) Elizabeth Gallas (University of Oxford (GB)) Florentin Bujor (University of Wisconsin (US)) Fred Luehring (Indiana University (US)) John Steven De Stefano Jr (Brookhaven National Laboratory (US)) Dr Rodney Walker (Ludwig-Maximilians-Univ. Muenchen (DE))

Presentation Materials