apstrim 1.2.0

Parameter and Object Serializer for EPICS, ADO or LITE

apstrim

Logger of Control System parameters and data objects. Analog of SDDS writer.

• Supported infrastructures: ADO, EPICS, LITE.
• Efficient binary serialization format.
• Like JSON. But it's faster and smaller.
• Numpy arrays supported.
• Optional online compression.
• Basic plotting of logged data.

Installation

Dependencies: msgpack, msgpack-numpy, caproto. These packages will be installed using pip:

pip3 install apstrim

The example program for deserialization and plotting apstrim.plot requires additional package: pyqtgraph.

Examples

Serialization

:python -m apstrim -nEPICS testAPD:scope1:MeanValue_RBV
pars: {'testAPD:scope1:MeanValue_RBV': ['0']}
21-06-19 11:06:57 Logged 61 paragraphs, 1.36 KBytes
...

:python -m apstrim -nEPICS --compress testAPD:scope1:MeanValue_RBV
pars: {'testAPD:scope1:MeanValue_RBV': ['0']}
21-06-19 11:10:35 Logged 61 paragraphs, 1.06 KBytes
...
# Compression ratio = 1.28

:python -m apstrim -nEPICS testAPD:scope1:MeanValue_RBV,Waveform_RBV
21-06-18 22:51:15 Logged 122 paragraphs, 492.837 KBytes
...

:python -m apstrim -nEPICS --compress testAPD:scope1:MeanValue_RBV,WaveForm_RBV
21-06-19 11:04:58 Logged 122 paragraphs, 492.682 KBytes
...
# Note, Compression is very poor for vector parameters

python -m apstrim -nLITE liteHost:dev1:cycle
pars: {'acnlin23:dev1:cycle': ['0']}
21-06-19 11:16:42 Logged 5729 paragraphs, 103.14 KBytes
...

:python -m apstrim -nLITE --compress liteHost:dev1:cycle
21-06-19 11:18:02 Logged 5733 paragraphs, 53.75 KBytes
...
# Compression ratio = 1.9

:python -m apstrim -nLITE liteHost:dev1:cycle,y
pars: {'acnlin23:dev1:cycle': ['0'], 'acnlin23:dev1:y': ['1']}
21-06-19 10:57:30 Logged 5743 paragraphs, 46247.198 KBytes
...

Example of deserialization and plotting of the logged data files.

python -m apstrim.plot *.aps