[hobbit] FW: Question on RRD graph

[Hubbard, Greg L]

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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