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This approach is somewhat more complex, but is guaranteed to analyze only "recent" events coming from the DAQ network (no disks involved, so it's fast!).  It has the disadvantage that it is not guaranteed to analyze every event in a run.  This approach is best when you need guaranteed real-time feedback, e.g. for tuning experiment/accelerator settings based on real-time plots.  To use this mode, create a DataSource object this like:

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There are other complications starting the code and gathering results from the MPI processes.  You must use the data gathering pattern here.  Contact the analysis group or your hutch Point Of Contact if you wish to use this mode.