1. Independent front-end read out subsystems for 17 detectors in three underground sites. All electronics modules of each subsystem are reside in one VME crate Just event building in each VME crates Design BW: 1 kHz event rate, 2MB/s per crate The Daya Bay Reactor Neutrino Experiment.  A neutrino-oscillation experiment  Measure the mixing angle θ 13 Using anti-neutrinos produced by the reactors On Daya Bay Power Plant (NPP) in Shenzhen, China. DAQ Architecture Design of Daya Bay Reactor Neutrino Experiment PDAQ-12 Fei Li ( IHEP, China)

2. DAQ Software Architecture Design Based on the framework of ATLAS TDAQ and BESIII DAQ, – Online software (almost reuse ATLAS) Configure, control, and monitor the DAQ system Provide services to data flow – Data flow software (ATLAS+BES+DYB) Responsible for all the processing and transportation of physics data Data Flow Software Back end Gathering and monitoring Front Read Out Online Software Data Storage Event Receive Data Read Event Pack Event Send Elec Modules Data Writer Storage Array EFIO SFO (sub farm output) ROS (read out system ) PT (processing task) EFD (event flow distributer ) Input Task Output Task Ext Task Monitor Task Memory Share EFIO ROS run on Timesys RT Linux @ PowerPC

3. Hardware and Deployment Design Timesys RT Linux @ PowerPC VME controller Blade server computer farm, SLC4 @ X86 Daya Bay Near Lin Ao Near FAR Online computer room 9 blades 2 servers ROS*5 ROS*7 EFDs SFO*1 Partition DBN Partition LAN Partition FAR Deployment can be configurable for different experiment requirements