21-27 March 2009
Europe/Prague timezone

Reliable online data-replication in LHCb

23 Mar 2009, 16:30
Club D (Prague)

Club D


Prague Congress Centre 5. května 65, 140 00 Prague 4, Czech Republic
oral Online Computing Online Computing


Daniel Sonnick (University of Applied Sciences Kaiserslautern)


In LHCb raw data files are created on a high-performance storage system using a custom, speed-optimized file-writing software. The file-writing is orchestrated by a data-base, which represents the life-cycle of a file and is the entry point for all operations related to files such as run-start, run-stop, file-migration, file-pinning and ultimately file-deletion. File copying to the Tier0 is done using LHCbs standard Grid framework, DIRAC. The file-mover processes also prepare the Offline-reprocessing by entering the files into the LHCb Bookkeeping database. In all these operations a lot of emphasis has been put on reliability via handshakes, cross-checks and retries. This paper presents the architecture, implementation details, performance results from the LHCb Full System test and associated tools (command line, web-interface).

Primary author

Daniel Sonnick (University of Applied Sciences Kaiserslautern)


Presentation Materials