[rrd-users] Monitoring Spoolers

[Rob Ford]

Can anyone help with the following problem:

All I need to monitor is a spooler i.e. so many files go in and out of it throughout the day/night.  About a year ago I used MRTG to perform this task, but I now require the extra graphical functions of RRD.  I found MRTG fairly straight forward, but unfortunately RRD has proved to be alot more tricky.

Having read through the tutorials and mailing-archives, I created my database as follows:

rrdtool create brisqck.rrd -s 60 DS:brisqck:ABSOLUTE:60:0:200 RRA:AVERAGE:0.5:1:6000

I then wrote a perl script that ran every min on a crontab that updated the database using the following command:

rrdtool update brisqck.rrd N:value

If I try and retrieve any information using fetch this is what I get back:

rrdtool fetch brisqck.rrd AVERAGE

sample.......

1011007800: 1.0000000000e+00
1011008100: 1.0000000000e+00
1011008400: 1.1966666667e+00
1011008700: 1.1933333333e+00
1011009000: 2.5966666667e+00
1011009300: 2.0100000000e+00
1011009600: 1.0000000000e+00
1011009900: 2.0000000000e+00
1011010200: 1.2033333333e+00
1011010500: 1.0000000000e+00
1011010800: 2.0166666667e+00
1011011100: 1.3933333333e+00
1011011400: 1.2000000000e+00
1011011700: 1.0000000000e+00
1011012000: 1.3966666667e+00

When I try an generate a graph from this I get:

rrdtool graph brisqck.gif DEF:mybrisqck=brisqck.rrd:brisqck:AVERAGE
0x0

When I ran through the examples in the tutorial everything seemed to run ok and all the example graphs seemed to generate without any problems.  I am running RRD on Solaris 8 on a SUN Ultra5.
It could be something really obvious that I have missed, but any help anyone could give me would be greatly appreciated.

Regards

Rob Ford



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