[rrd-users] fetch problem?

[luc.belleville at connexim.ca]

May be it has been discus before but I can not find any trace of it.  I
also check all the release not and I could not find any information on
it.
 

Did the fetch logic change between 1.0.33 and 1.2.15 ?

 

I did a fetch with both on the same RRD and they do not return the same
result:

 

/usr/local/rrdtool-1.0.33/bin/rrdtool fetch
/usr/local/ogr/torrus/rrd/labce/CE/CE1/3.1.253.31_Fa0_0_if-mib-IFSPEED_1
00000000.rrd AVERAGE -r 300 -s 1164214200 -e 1164214500

             ifHCInOctetsifHCInUcastPkts ifHCOutOctetsifHCOutUcastPkts
ifInDiscards    ifInErrors ifOutDiscards   ifOutErrors

 

1164214200: 2.4697370121e+02 2.4345375653e+00 2.8747105233e+02
2.0478456592e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00
0.0000000000e+00

1164214500: 2.4973870023e+02 2.4436822675e+00 2.7211157610e+02
2.1111507566e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00
0.0000000000e+00

 

While with 1.2.15 we have

/usr/local/rrdtool-1.2.15/bin/rrdtool fetch
/usr/local/ogr/torrus/rrd/labce/CE/CE1/3.1.253.31_Fa0_0_if-mib-IFSPEED_1
00000000.rrd AVERAGE -r 300 -s 1164214200 -e 1164214500

                   ifHCInOctets     ifHCInUcastPkts       ifHCOutOctets
ifHCOutUcastPkts        ifInDiscards          ifInErrors
ifOutDiscards         ifOutErrors

 

1164214500: 2.4973870023e+02 2.4436822675e+00 2.7211157610e+02
2.1111507566e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00
0.0000000000e+00

1164214800: 2.3876253405e+02 2.3550167264e+00 2.6478978375e+02
2.0012293907e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00
0.0000000000e+00

 

An other test like this one :

/usr/local/rrdtool-1.0.33/bin/rrdtool fetch
/usr/local/ogr/torrus/rrd/labce/CE/CE1/3.1.253.31_Fa0_0_if-mib-IFSPEED_1
00000000.rrd AVERAGE -r 300 -s 1164214199 -e 1164214199

             ifHCInOctetsifHCInUcastPkts ifHCOutOctetsifHCOutUcastPkts
ifInDiscards    ifInErrors ifOutDiscards   ifOutErrors

 

1164213900: 2.6194484373e+02 2.3953592604e+00 2.9259346129e+02
1.9986915888e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00
0.0000000000e+00

1164214200: 2.4697370121e+02 2.4345375653e+00 2.8747105233e+02
2.0478456592e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00
0.0000000000e+00

 

--> If the start is not on a boundary, it adjusts to the lower one.

--> If the end is not on a boundary, it adjusts to the upper one.

 

While with 1.2.15 we have

/usr/local/rrdtool-1.2.15/bin/rrdtool fetch
/usr/local/ogr/torrus/rrd/labce/CE/CE1/3.1.253.31_Fa0_0_if-mib-IFSPEED_1
00000000.rrd AVERAGE -r 300 -s 1164214199 -e 1164214199

                   ifHCInOctets     ifHCInUcastPkts       ifHCOutOctets
ifHCOutUcastPkts        ifInDiscards          ifInErrors
ifOutDiscards         ifOutErrors

 

1164214200: 2.4697370121e+02 2.4345375653e+00 2.8747105233e+02
2.0478456592e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00
0.0000000000e+00

 

--> If the start is not on a boundary, it adjusts to the upper one.

--> If the end is not on a boundary, it adjusts to the upper one.

 

I have tried in Perl and it does the same thing.

#!/usr/bin/perl

use RRDs;

use Getopt::Long;

 

my $t_end="";

my $ok = GetOptions(

                    'rrd=s'       => \$filename,

                    'start=s'     => \$t_start,

                    'end=s'       => \$t_end

                    );

 

my( $f_start, $f_step, $f_names, $f_data ) =

    RRDs::fetch( $filename, "AVERAGE", '--resolution', 300, '--start',
$t_start, '--end', $t_end );

$ERR = RRDs::error;

if( $ERR )

{

    print("Error during RRD fetch for $filename: $ERR\n");

    exit 1;

 

}

 

print "STEP = $f_step\n";

for( my $j = 0; $j < @{$f_data}; $j++ )

{

    for( my $i = 0; $i < @{$f_names}; $i++ )

    {

        $f_time = $f_start + ($j * $f_step);

        print "$f_names->[$i] = [ $f_data->[$j]->[$i], $f_time ]\n";

    }

}

 

 

Is it a problem in 1.2.15 or was it a problem in 1.0.33?

Where they both OK, it is just that the logic changed?

 

Thank,

Luc

 

 

 


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