Quite right. For databases you have to spin off a separate process to deal with the database, which communicates with the selecting process through a socket. Thus all the things you are trying to coordinate become files or sockets.

I definitely should have made this more explicit. I over-read the OPs statement that My first thought was forking child processes. Thanks for catching it.

In reply to Re^2: What's the best way to fetch data from multiple sources asynchronously? by rodion
in thread What's the best way to fetch data from multiple sources asynchronously? by xaprb

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