In this talk, we will present an overview of the LHCb trigger during Runs I and II, including real-time calibration of the detector, and detail plans for the trigger to be used during Run III of the experiment. For Run III data-taking, the level-0 hardware trigger used in the previous runs has been removed, requiring the first stage of the software trigger to process events at the LHC bunch-crossing rate of 30 MHz. In order to achieve this goal, an unprecedented effort in all the real-time systems will be needed. The talk focuses primarily on real-time alignment and calibration of detector performance. The ways of making the throughput flawless in terms of software will also be discussed.
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