There are many log handlers on CPAN, I'm sure some of them will fit your needs.

If you want to do it manually it's probably good to set up a logging process that listens on a local socket, and all other process connect to that process. It can spawn a thread for each connection, assembles the logs in a queue and write it to a file.

In reply to Re: Writing to one file from multiple processes by moritz
in thread Writing to one file from multiple processes by KianTern

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