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This method of analysis reads the detector data from a fast storage layer called fast feedback (FFB), dedicated to the running experiment, and runs a prepared analysis. Any framework which can read XTC files can be adopted to run as a fast feedback application. The most common framework used with this method is psana.
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Cons: not quite real time (<5 minutes); may compete with the HDF5 translator if the translation services are run on the FFB storage layer.