The recommended way of having 1 publisher and multiple subscribers about iceoryx

[elBoberido]

Yes, they will be be able to get data from a single publisher. You don't even need to copy the application to different directories but just make sure each invocation of the binary creates a new app-name. Can be done by providing a cmd line parameter or you could use genuid to generate unique app-names on the fly or use the pid + current time. I would recommend to enable the process monitoring in RouDi (-m ON) if you do this else the resources will not be cleaned up if an app crashes and gets restarted since it will have a different app name.

[elBoberido]

Oh, sorry. What I actually meant was uuidgen https://www.man7.org/linux/man-pages/man1/uuidgen.1.html

[elBoberido]

We have a mechanism that each process needs to send a heartbeat to RouDi. If this heartbeat is not send for a longer time, RouDi assumes the application crashed and cleans up the resources thereafter if started with -m ON. The cleanup happens only for applications which terminated abnormally, e.g. a crash. Applications which terminated gracefully already cleaned up their resources on their shutdown.

[elBoberido]

The constexpr char APP_NAME[] is just there to prevent magic values. You need one per process, not per subscriber and you can also use iox::runtime::PoshRuntime::initRuntime("my-app-name"); instead of the constexpr.

After the initRuntime call you can create multiple endpoints like publisher, subscriber, clients, etc. in the same process.

Does this answer your question?

[afpgit]

How does this work in terms of scaling the number of subscribers?

Let's say, for the sake of example, I copy the executable associated with mysubscriber.cpp, i.e., mysubscriber.exe, into directory1, directory2, directory3, etc. Will they be able to get data from a single publisher?

Is there any way to automatically create app-names without worrying about manually creating unique app-names?

[afpgit]

I did google genuid but nothing came up. May I have a link to it to learn more about it?

[afpgit]

Please correct me if I am wrong. With ./iox-roudi -m ON, the daemon will force clean up any subscribers that are crashed or peacefully terminated.

[elBoberido]

@afpgit closing the issue. If there are more question feel free to re-open it