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 optimized for read-only indexes distributed over independent shards on independent nodes.
Cite
@article{arxiv.1505.07417,
title = {Event Index - an LHCb Event Search System},
author = {Andrey Ustyuzhanin and Alexey Artemov and Nikita Kazeev and Artem Redkin},
journal= {arXiv preprint arXiv:1505.07417},
year = {2016}
}
Comments
Report for the proceedings of the CHEP-2015 conference