Experimental Physics and
Industrial Control System

Mark Rivers via Tech-talk <tech-talk at aps.anl.gov> · Mon, 10 Aug 2020 02:16:14 +0000

To give good advice on this we need to know more about the performance requirements. If we assume the waveforms are doubles (8 bytes per sample) then each capture is 1.8 M * 40 * 8 = 576 MB. How often do you need to do this, e.g. once per second, once per hour, or once per day? That could determine if a Channel Access client is practical or if you need something within the IOC.

Mark

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On Aug 8, 2020, at 3:41 PM, Ha, Kiman via Tech-talk <tech-talk at aps.anl.gov> wrote:

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Hi All,

NSLS-II LLRF system has a new circular buffer for the LLRF system oscilloscope function.
A single waveform size is 1.8 M point and a total of ~40 PVs.

Does anyone have and any EPICS HDF client program for waveform PVs to HDF5 files?
Our application is simple steps if the beam dump caused? Read waveforms and write HDF5 files to a specific directory (DD/MM/YYYY).

Thanks,
Kiman

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System