Hello group, I tried using "use threads" and quering by simple: my $id = threads->tid; But it always returns 0 ( meaning that the perl code is running under main() program ), but how do I identifiy each CLONE ?? I want to obtain unique identified of each CLONE, because the goal is to create DB connection for each CLONE for performance reasons, the DBI object/handle AFAIK shouldn't be shared. Maybe enumerating in sub CLONE() ?? Is this launching CLONE of perl module serialized ? And I could fetch current running CLONE id from authorize () ? wiki.freeradius.org states ( about CLONE() ): "In this function you can initialize some variables that should be local for this thread. For example an Database connection." -- Jakub Wartak -vnull http://vnull.pcnet.com.pl/