Create a separate category that only writes to Logfile

my %loggerConfig = (
  "log4perl.category.default_logger" => "INFO, Stdout, SYSLOG, Logfile
+",
  "log4perl.category.file.only"      => "INFO, Logfile",
);
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Then to use it:

my $log = Log::Log4perl->get_logger("file.only");
$log->info('whatever');
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