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#! /usr/bin/perl
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",
"RRA:AVERAGE:0.5:1:300",
"RRA:MIN:0.5:12:300",
"RRA:MAX:0.5:12:300",
);
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:".(sin($t/3000)*50+50);
if ($ERROR = RRDs::error) {
die "$0: unable to update `$rrd': $ERROR\n";
}
}
RRDs::graph "$name.png",
"--title", uc($name)." Demo",
"--start", "now",
"--end", "start+1d",
"--lower-limit=0",
"--interlaced",
"--imgformat","PNG",
"--width=450",
"DEF:a=$rrd:a:AVERAGE",
"DEF:b=$rrd:a:MIN",
"DEF:c=$rrd:a:MAX",
"AREA:a#00b6e4:real",
"LINE1:b#0022e9:min",
"LINE1:c#00ee22:max",
;
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 MIN and MAX archives\n";