Design of the Event Metadata System for the Experiments at NICA

Alexandrov, Evgeny; Aleksandrov, I. N.; Degtyarev, Anatoli; Gertsenberger, К.; Filozova, I.; Klimai, Peter; Nozik, Alexander; Yakovlev, A. V.

doi:10.1134/s1547477121050034

Cited by 4 publications

(2 citation statements)

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“…This is the core EMS component storing event metadata in the PostgreSQL database. The choice of the database management system has been made based on scalability, performance, and management criteria described in [7]. The Event Catalogue uniquely identifies stored events with a file pointer defining a reference to the data file and event number in the file.…”

Section: Event Cataloguementioning

confidence: 99%

“…The overall architecture of those systems as well as database management systems used for such event storage differ quite radically between solutions, due to different operational environments, data volume, and available expertise. A more detailed review of the systems, as well as explanation of the design decisions made for the NICA EMS can be found in [7]. This paper describes the components and deployment of the first production version of the NICA EMS.…”

Section: Introductionmentioning

confidence: 99%

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Implementation of the Event Metadata System for physics analysis in the NICA experiments

Alexandrov

Aleksandrov²,

Chebotov³

et al. 2023

J. Phys.: Conf. Ser.

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NICA (Nuclotron-based Ion Collider fAcility) is a new accelerator complex, which is under construction at the Joint Institute for Nuclear Research in Dubna to study properties of dense baryonic matter. The experiments of the NICA projects have already generated and obtained substantial volumes of event data, and it is expected that the overall number of stored events will increase from the current value of hundreds of millions to several billion events per year. The developed Event Metadata System is required to store and index experimental event records obtained at NICA facilities, allowing to quickly search for only necessary events based on various criteria for further processing and physics analyses. The main aim of the information system that is described is to speed up desired physics analyses and data quality checks. In addition, it allows reducing the load of the NICA computing infrastructure. The Event Metadata System, which is presented in the paper, is integrated with other experimental and software systems, in particular, NICA ROOT-based frameworks and implemented Condition Database. An access and management of the event metadata in the Event Catalogue being used to select only events for a particular physics analysis are provided via several interfaces, such as REST API, Web UI, and a dedicated C++/ROOT interface. The detailed architecture of the system and developed services including monitoring are also presented.

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Section: Event Cataloguementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%