Provided by: liblog-log4perl-perl_1.49-1_all bug


       Log::Log4perl::Appender::RRDs - Log to a RRDtool Archive


           use Log::Log4perl qw(get_logger);
           use RRDs;

           my $DB = "myrrddb.dat";

             $DB, "--step=1",

           print time(), "\n";

             log4perl.category = INFO, RRDapp
             log4perl.appender.RRDapp = Log::Log4perl::Appender::RRDs
             log4perl.appender.RRDapp.dbname = $DB
             log4perl.appender.RRDapp.layout = Log::Log4perl::Layout::PatternLayout
             log4perl.appender.RRDapp.layout.ConversionPattern = N:%m

           my $logger = get_logger();

           for(10, 15, 20, 25) {
               sleep 1;


       "Log::Log4perl::Appender::RRDs" appenders facilitate writing data to RRDtool round-robin
       archives via Log4perl. For documentation on RRD and its Perl interface "RRDs" (which comes
       with the distribution), check out <>.

       Messages sent to Log4perl's RRDs appender are expected to be numerical values (ints or
       floats), which then are used to run a "rrdtool update" command on an existing round-robin
       database. The name of this database needs to be set in the appender's "dbname"
       configuration parameter.

       If there's more parameters you wish to pass to the "update" method, use the
       "rrdupd_params" configuration parameter:

           log4perl.appender.RRDapp.rrdupd_params = --template=in:out

       To read out the round robin database later on, use "rrdtool fetch" or "rrdtool graph" for
       graphic displays.


       Copyright 2002-2013 by Mike Schilli <> and Kevin Goess <>.

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.


       Please contribute patches to the project on Github:


       Send bug reports or requests for enhancements to the authors via our

       MAILING LIST (questions, bug reports, suggestions/patches):

       Authors (please contact them via the list above, not directly): Mike Schilli
       <>, Kevin Goess <>

       Contributors (in alphabetical order): Ateeq Altaf, Cory Bennett, Jens Berthold, Jeremy
       Bopp, Hutton Davidson, Chris R. Donnelly, Matisse Enzer, Hugh Esco, Anthony Foiani, James
       FitzGibbon, Carl Franks, Dennis Gregorovic, Andy Grundman, Paul Harrington, Alexander
       Hartmaier  David Hull, Robert Jacobson, Jason Kohles, Jeff Macdonald, Markus Peter, Brett
       Rann, Peter Rabbitson, Erik Selberg, Aaron Straup Cope, Lars Thegler, David Viner, Mac