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.

COPYRIGHT AND LICENSE

Copyright 2002-2009 by Mike Schilli <m@perlmeister.com> and Kevin Goess <cpan@goess.org>.

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