in reply to printing to STDOUT and a Logfile

This is the way I do it. It my be too simple for all your logging needs.
perl -e 'print "Hello\n";' | tee logfile

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... or If I also want to trap STDERR I do ... 
perl -e 'print "Hello\n;' >& logfile

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... but then again does logging need to be complicated?

In Section Seekers of Perl Wisdom