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I somehow expected the Parameter Server to be backed by some persistent storage.
Am I missing something or is it correct that any changes to the default parameters are gone the moment the master is stopped/restarted?
Are there any best practices for making the configuration persistant?
As already mentioned by @Procópio, the built-in parameter server is not persistent.
There are some alternative implementations though, and some are persistent.
vapor_master is one of those implementations. You may want to see whether this covers your requirements.
Edit: a presentation at ROSCon17 which provides some insight/background: DMTCP: Fixing the Single Point of Failure of the ROS Master (video, slides).
This is the expected behavior. Once the master is gone, so are the parameters.
The best you can do is to run a master in a separate terminal and keep it alive while you run/launch other things in another terminal.
Asked: 2020-04-27 17:47:10 -0500
Seen: 375 times
Last updated: Apr 28 '20
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