A monitoring system for the LHCb dataflow

This document presents a new system used to monitor the data acquisition of the LHCb experiment. The monitoring takes place from the time the data is triggered in the Front-End Boards all the way to the time it is temporarily stored in the online storage system, thus providing the operators of the experiment with a detailed overview of the status of the data acquisition system. This system was thought of as a complement to the already existing monitoring and control tools available in the Experiment Control System in order to facilitate the operation of LHCb. We will present the various features of the monitoring tool and how it is being used by the ones involved in the operation of the experiment