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#! /usr/bin/perl # this is for after install use lib qw( /usr/lib/perl ); use RRDs; my $start=time; my $rrd="randome.rrd"; my $name = $0; $name =~ s/.*\///g; $name =~ s/\.pl.*//g; RRDs::create ($rrd, "--start",$start-1, "--step",300, "DS:a:GAUGE:600:U:U", "DS:b:GAUGE:600:U:U", "RRA:AVERAGE:0.5:1:300"); my $ERROR = RRDs::error; die "$0: unable to create `$rrd': $ERROR\n" if $ERROR; # dropt some data into the rrd my $t; for ($t=$start; $t<$start+300*300; $t+=300){ RRDs::update $rrd, "$t:".rand(100).":".(sin($t/800)*50+50); if ($ERROR = RRDs::error) { die "$0: unable to update `$rrd': $ERROR\n"; } } RRDs::graph "$name.png", "--title", uc($name)." Demo", "--start", "$start + 1 h", "--end", "start + 1000 min", "--interlaced", "--imgformat","PNG", "--width=450", "DEF:a=$rrd:a:AVERAGE", "DEF:b=$rrd:b:AVERAGE", "CDEF:line=TIME,2400,%,300,LT,a,UNKN,IF", "AREA:b#00b6e4:beta", "AREA:line#0022e9:alpha", "LINE3:line#ff0000", ; if ($ERROR = RRDs::error) { die "ERROR: $ERROR\n"; }; print "This script has created $name.png in the current directory\n"; print "This demonstrates the use of the TIME and % RPN operators\n";