[hobbit] strange graph behavior - random machines & graphs

[Kern, Thomas]

Could you give a short example of a bogus and a changed (NaN) entry,
just in case that is also happening to some of my data files?
 

/Thomas Kern
/301-903-2211 (O)
/301-905-6427 (M) 

 


________________________________

	From: Gary Baluha [mailto:gumby3203 at gmail.com] 
	Sent: Wednesday, December 05, 2007 11:53 AM
	To: hobbit at hswn.dk
	Subject: Re: [hobbit] strange graph behavior - random machines &
graphs
	
	
	I am now completely convinced that the strange behavior of the
graphs is due to some bad data getting inserted into the .rrd database
files.  The bad data is always the same value: 5.1776682516e+170.
That's what the value looks like when you do an rrddump on the .rrd
database file. 
	
	I still have no idea where this value is coming from, but I have
at least determined how to fix these graphs.  I'm working on a script to
do this, but for now, I manually do an rrddump of the file, change all
bogus values to NaN (basically, searching for "e+1", since none of the
values I trend generally get that large, so I know these entries are
just averaged values of correct data and the 5.17... number), and then
do an rrdrestore from the modified xml file.
	
	It would be nice to determine where this problem is coming from,
though.
	

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