[rrd-users] RRDtool for dummies

[eddie]

Are there any reference for non-programmer.  I have no problem with MRTG to
get any counters I want as long as it support SNMP.  However, when I tried
on RRDtool am totally lost.  I've tried many times but no success.  I know
RRDTools is the only software that can provide multiple counters in single
graph whereas MRTG can only have two.  Anyway, this is how I create the
RRDtools:

I think the problem is on

1.  Create the rrd file
./rrdtool create pop1conx.rrd    \
        DS:pop1conx:COUNTER:600:U:U     \
        RRA:AVERAGE:0:5:1:600   \
        RRA:AVERAGE:0:5:6:600   \
        RRA:AVERAGE:0:5:24:700  \
        RRA:AVERAGE:0:5:288:797 \
        RRA:MAX:0.5:1:600       \
        RRA:MAX:0.5:6:700       \
        RRA:MAX:0.5:24:775      \
        RRA:MAX:0.5:288:797

2.  Script to get the counter.  I got stucked here.

#!/usr/bin/perl
$pop1conx = `snmpget 202.75.130.115 dingo .1.3.6.1.4.1.311.1.7.8.1.9.0`;
@cmd="/usr/local/rrdtool-1.0.24/bin/rrdtool update webconx.rrd N:$pop1conx";
system(@cmd);

The script returns with the following error:

RROR: expected 1 data source readings (got 0) from =:...

I think the snmpget doesn't get the single result.  If I use snmpget to the
server, I got this result instead of the value 12:

[root at eddx bin]# snmpget 202.75.130.115 dingo .1.3.6.1.4.1.311.1.7.8.1.9.0
enterprises.311.1.7.8.1.9.0 = 12

3.  Due to the above error, my below graph appears to be counterless.

Would appreciate help.

Regards,





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