Open AccessDEVELOPMENT OF THE EVENT METADATA SYSTEM FOR THE NICA EXPERIMENTS
Author(s) -
Evgeny Alexandrov,
I. N. Aleksandrov,
Anatoli Degtyarev,
I. Filozova,
К. Gertsenberger,
Peter Klimai,
A. Yakovlev
Publication year - 2021
Publication title -
9th international conference "distributed computing and grid technologies in science and education"
Language(s) - English
Resource type - Conference proceedings
DOI - 10.54546/mlit.2021.80.18.001
Subject(s) - metadata , computer science , event (particle physics) , search engine indexing , task (project management) , process (computing) , metadata modeling , software , volume (thermodynamics) , information retrieval , service (business) , metadata repository , database , data mining , programming language , operating system , systems engineering , physics , economy , quantum mechanics , engineering , economics
Particle collision experiments are known to generate a substantial amount of data that must be storedand then analyzed. Typically, only a small subset of all collected events is relevant when performing aparticular physics analysis task. Although it is possible to obtain the required subset of event recordsdirectly, by iterating through the whole volume of the collected data, the process is very time andresource consuming. Instead, a more convenient approach widely used in modern particle collisionexperiments is to have an event metadata or indexing system that stores summary properties of allevents and allows for the fast search for and retrieval of only necessary events based on given criteria.Such a system, called the Event Metadata System, has been developed for the current fixed-target andfuture collider experiments of the NICA project. The design of the system, its components, userinterfaces and the REST API service, its integration with existing experiment systems and software, aswell as associated challenges, are presented.