NAME

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

SYNOPSIS

    use Log::Log4perl qw(get_logger);
    use RRDs;
    
    my $DB = "myrrddb.dat";
    
    RRDs::create(
      $DB, "--step=1",
      "DS:myvalue:GAUGE:2:U:U",
      "RRA:MAX:0.5:1:120");
    
    print time(), "\n";
    
    Log::Log4perl->init(\qq{
      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) {
        $logger->info($_);
        sleep 1;
    }

DESCRIPTION

"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 <http://rrdtool.org>.

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.

LICENSE

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

AUTHOR

Please contribute patches to the project on Github:

    http://github.com/mschilli/log4perl

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

MAILING LIST (questions, bug reports, suggestions/patches): log4perl-devel@lists.sourceforge.net

Authors (please contact them via the list above, not directly): Mike Schilli <m@perlmeister.com>, Kevin Goess <cpan@goess.org>

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 Yang.