Design and Development of JUNO DAQ Data Flow Software

The Jiangmen Underground Neutrino Observatory (JUNO) is the state of the art, large liquid scintillator neutrino experiment under construction with a broad physics program in southern China. The primary physics goal of JUNO is to measure the neutrino mass ordering. The front-end electronics (FEEs) of JUNO will generate more than 40 GB/s of raw data, including data in various formats from multiple detectors. A large distributed data acquisition (DAQ) system was designed and developed. The system is mainly divided into data flow software and online software. The data flow software is responsible for the readout, processing, and storage of raw data, while the online software provides services such as software configuration and operational control. This article will introduce the architecture design and the recent development progress of the data flow software.