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Regular version of the site

Article

Event Index — an LHCb Event Search System

Journal of Physics: Conference Series. 2015. Vol. 664. No. 3. P. 032019-032019.
Kazeev N., Ustyuzhanin A., Artemov A., Redkin A.
Editor of translation: J. Chater.

During LHC Run 1, the LHCb experiment recorded around 1011 collision events. This paper describes Event Index — an event search system. Its primary function is to quickly select subsets of events from a combination of conditions, such as the estimated decay channel or number of hits in a subdetector. Event Index is essentially Apache Lucene [1] optimized for read-only indexes distributed over independent shards on independent nodes.