[rrd-developers] RRDs::fetch zero values returns NaN

[steve rader]

 > From: me
 > The problem is that NaN values fetched with RRDs::fetch are now
 > returned as 'undef' instead of the string 'NaN'.  

Now I find that RRDs::fetch is broke with respect to zero values:
with 1.0.33, RRDs::fetch of zero values returns 'undef'.  

I wrote a little script to demonstrate the problem... and here's
the results...

 chive(rader): rrdtool fetch -s -10min -e now \
   /usr/local/nrg/web/apache/Chive/Chive-tp.rrd AVERAGE \
   | tail -4
 984673800: 1.1650888889e+00
 984674100: 0.0000000000e+00
 984674400: 0.0000000000e+00
 984674700:        NaN

 chive(rader): ./rrdfetch.pl \
   /usr/local/nrg/web/apache/Chive/Chive-tp.rrd AVERAGE \
   | tail -4
 984673800: 1.1650888889e+00 
 984674100: 0.0000000000e+00  (undef)
 984674400: 0.0000000000e+00  (undef)
 984674700: 0.0000000000e+00  (undef)

steve 
- - - 
systems & network guy
high energy physics
university of wisconsin
- - - 

#!/usr/bin/perl
#

use lib '/usr/local/rrdtool-1.0.33/lib/perl';
use RRDs;
($start,$step,$names,$data) = RRDs::fetch ("$ARGV[0]",'AVERAGE');
if ( $error = RRDs::error ) { 
  print "rrdtool fetch failed: \"$error\"\n";
  exit 1;
}
$d_start = $start;
foreach $line (@$data) {
  print " $d_start: ";
  $d_start += $step;
  foreach $val (@$line) { 
    printf "%1.10e ", $val; 
    if ( ! $val ) { print " (undef)"; }
  }
  print "\n";
}


--
Unsubscribe mailto:rrd-developers-request at list.ee.ethz.ch?subject=unsubscribe
Help        mailto:rrd-developers-request at list.ee.ethz.ch?subject=help
Archive     http://www.ee.ethz.ch/~slist/rrd-developers
WebAdmin    http://www.ee.ethz.ch/~slist/lsg2.cgi