I've played with rrdtool for a while, and ran it all neatly packaged up in
MRTG and 14all.cgi for a while, but now I want to play a little:
I'm trying to gather 1 day averages. Based on the documents and faqs I have
read, I should be able to do something like:
[EMAIL PROTECTED] dmcdonald]$ /usr/local/rrdtool/bin/rrdtool fetch
/home/httpd/mrtg/172.16.0.1_fa0_0.rrd AVERAGE -r 86400 -s end-0
ds0 ds1
986589300: 4.6913362181e+04 2.8086596653e+04
986589600: nan nan
[EMAIL PROTECTED] dmcdonald]$
Except that I get the same number when I do:
[EMAIL PROTECTED] dmcdonald]$ /usr/local/rrdtool/bin/rrdtool fetch
/home/httpd/mrtg/172.16.0.1_fa0_0.rrd AVERAGE -r 300 -s end-0
ds0 ds1
986589300: 4.6913362181e+04 2.8086596653e+04
986589600: nan nan
[EMAIL PROTECTED] dmcdonald]$
So, either the -r flag doesn't work, or I've misinterpreted what it does....
I also tried to get the information in perl, copying liberally form a script
posted by Steve Rader:
#!/usr/bin/perl -w
use RRDs;
my $file = '/home/http/mrtg/172.16.0.1_fa0_0.rrd';
my $interval = 86400;
my @opts;
push @opts, $file;
push @opts, "AVERAGE";
push @opts, "-r $interval";
my ($start,$step,$names,$data) =
RRDs::fetch @opts;
print localtime($start);
When I run this, I get "unitialized value" errors on $start, and if I use
debug and try to step into the RRDs::fetch line, I don't hit a subroutine.
what's up with that?
Daniel J McDonald - CCIE 2495, CNX
Principal Network Specialist
Digicon Technologies
http://www.digicontech.com
[EMAIL PROTECTED]
Digicon - A Cisco Systems Partner, Silver Certified.
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