TY  - JOUR
A1  - Richter, Matthias
A1  - Krzewicki, Mikolaj
A1  - Eulisse, Giulio
T1  - Data handling in the Alice O2 event processing
T2  - EPJ Web of Conferences
N2  - The ALICE experiment at the Large Hadron Collider (LHC) at CERN is planned to be operated in a continuous data-taking mode in Run 3. This will allow to inspect data from all Pb-Pb collisions at a rate of 50 kHz, giving access to rare physics signals embedded in a large background.
Based on experience with real-time reconstruction of particle trajectories and event properties in the ALICE High Level Trigger, the ALICE O2 facility is currently designed and developed to support processing of a continuous, triggerless stream of data segmented into entities referred to as timeframes.
Both raw data input into the ALICE O2 system and the actual processing of aggregated timeframes are distributed among multiple processes on a manynode cluster. Process communication is based on the asynchronous message passing paradigm.
This paper presents the basic concept for identification of data in the distributed system together with prototype implementations and performance measurements.
Y1  - 2019
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/71811
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-718114
SN  - 2100-014X
VL  - 214
IS  - 01035
PB  - EDP Sciences
CY  - Les Ulis
ER  -