to the same file as well as different files or just to the same file

<<<< ^^^^^ >>>>
$cfg{usc} = {User => 'brannon',      Pass => 'xxx', 
             Host => 'lnc.usc.edu',  Dir  => '/lnc/brannon',
             Log  => 'stderr-and-stdout.log'	
	    };
 # or ...
$cfg{usc} = {User => 'brannon',      Pass => 'xxx', 
             Host => 'lnc.usc.edu',  Dir  => '/lnc/brannon',
             StdErr  => 'stderr.log'	
	    };
... inquiring minds want your opinion