99 research outputs found
Event Index - an LHCb Event Search System
During LHC Run 1, the LHCb experiment recorded around 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.Comment: Report for the proceedings of the CHEP-2015 conferenc
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