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.\" ========================================================================
.\"
.IX Title "Appender::RRDs 3"
.TH Appender::RRDs 3 "2015-04-19" "perl v5.16.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
Log::Log4perl::Appender::RRDs \- Log to a RRDtool Archive
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&    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(), "\en";
\&    
\&    Log::Log4perl\->init(\eqq{
\&      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;
\&    }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\f(CW\*(C`Log::Log4perl::Appender::RRDs\*(C'\fR appenders facilitate writing data
to RRDtool round-robin archives via Log4perl. For documentation
on \s-1RRD\s0 and its Perl interface \f(CW\*(C`RRDs\*(C'\fR (which comes with the distribution),
check out <http://rrdtool.org>.
.PP
Messages sent to Log4perl's RRDs appender are expected to be numerical values
(ints or floats), which then are used to run a \f(CW\*(C`rrdtool update\*(C'\fR command
on an existing round-robin database. The name of this database needs to
be set in the appender's \f(CW\*(C`dbname\*(C'\fR configuration parameter.
.PP
If there's more parameters you wish to pass to the \f(CW\*(C`update\*(C'\fR method,
use the \f(CW\*(C`rrdupd_params\*(C'\fR configuration parameter:
.PP
.Vb 1
\&    log4perl.appender.RRDapp.rrdupd_params = \-\-template=in:out
.Ve
.PP
To read out the round robin database later on, use \f(CW\*(C`rrdtool fetch\*(C'\fR
or \f(CW\*(C`rrdtool graph\*(C'\fR for graphic displays.
.SH "LICENSE"
.IX Header "LICENSE"
Copyright 2002\-2013 by Mike Schilli <m@perlmeister.com> 
and Kevin Goess <cpan@goess.org>.
.PP
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
.SH "AUTHOR"
.IX Header "AUTHOR"
Please contribute patches to the project on Github:
.PP
.Vb 1
\&    http://github.com/mschilli/log4perl
.Ve
.PP
Send bug reports or requests for enhancements to the authors via our
.PP
\&\s-1MAILING LIST \s0(questions, bug reports, suggestions/patches): 
log4perl\-devel@lists.sourceforge.net
.PP
Authors (please contact them via the list above, not directly):
Mike Schilli <m@perlmeister.com>,
Kevin Goess <cpan@goess.org>
.PP
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.