[hobbit] FW: Question on RRD graph

You need to change from DERIVE to something else. DERIVE computes the rate of change in each sample period, and handles rollovers pretty well. The base value for DERIVE is "widgets per second" and the number is scaled. Since your printers probably can't print a lot of pages per second, you are getting fractions. One trick is to simply scale the number back up to be what you want in the sample period. (multiply the stored value by 300, for instance, to get back the change in the counter during 5 minutes. The RRDTool documentation (look in Google) will explain how to use RPN to calculate a value based on data in the RRD.

But if you simply want to graph the count as it increases over time until it rolls over or is reset, then change from DERIVE to GUAGE. I imagine you will have to delete your existing RRD files if you make this change.

Good luck!

GLH

From: Gada, Subhash [mailto:subhash.gada at logicacmg.com] 
Sent: Thursday, March 23, 2006 5:53 AM
To: hobbit at hswn.dk
Subject: [hobbit] FW: Question on RRD graph



 

 

Hi,

 

The Graphs for the custom test is displayed wrong.

 

 

In my custom rrd script I have used DERIVE as the data source

type echo "DS:pageno:DERIVE:600:0:U"

# Data for 'pages' test reported to hobbit.

PRN317:177

PRN313:422

PRN306:3639

PRN201:2140

PRN021:2466

PRN020:1911

PRN019:4431

PRN018:410

PRN017:680

PRN016:6092

PRN015:11828

PRN014:5766

PRN013:5337

PRN012:2279

PRN011:1762

PRN010:731

PRN009:1879

PRN008:3224

PRN007:4767

PRN006:7263

PRN005:1205

PRN004:5355

PRN003:2755

PRN002:1940

PRN001:433

 

I would like to graph number of pages printed on YAXIS

Can any one tell me what is wrong.

I don't understand what is 100 m, 200 m ........ for the number

of pages scale.

#configuration for 'pages' test in hobbitgraphs.cfg

[pages]

        FNPATTERN pages(.*).rrd

        TITLE Pages printed (since restart)

        YAXIS Number of pages

        DEF:p at RRDIDX@=@RRDFN@:pageno:AVERAGE

        LINE2:p at RRDIDX@#@COLOR@:@RRDPARAM@

        GPRINT:p at RRDIDX@:LAST: \: %5.1lf (cur)

        GPRINT:p at RRDIDX@:MAX: \: %5.1lf (max)

        GPRINT:p at RRDIDX@:MIN: \: %5.1lf (min)

        GPRINT:p at RRDIDX@:AVERAGE: \: %5.1lf (avg)\n

 

 



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