[rrd-users] trend woes

[Robert Hagens]

I have an rrd file with a few weeks of data in it. Using fetch, I can
see I have data points every 5 minutes from before 5/10/09 to current
(5/20/09).

My RRD file def is 

 

"DS:raw:GAUGE:3600:0:1",

            "RRA:AVERAGE:0.5:1:17280",

            "RRA:AVERAGE:0.5:288:360",

 

When I try to use trend like 

 

graph x --start 1241969266 --end 1242829666
'DEF:rawdata=/usr/local/tools/rrd/envysion.ea.rrd:raw:AVERAGE' \

'CDEF:trend=rawdata,854400,TREND'  \

'VDEF:last=trend,LAST' 'PRINT:last:%2.4lf'

 

I get nan

 

It seems I should be able to set the timespan parameter for TREND to 10
days (10*24*60*60). However, I get nan.

If I reduce the timespan to a somewhat random, smaller number (say
850400), then I get a number. 

 

Any thoughts as to why I am getting nan? There are no nan datapoints in
this time range, I've checked with fetch. 

 

Using TRENDNAN yields the same result.

 

Thanks,
Rob

 

 

Robert Hagens | Chief Technical Officer| Envysion, Inc. 

950 Spruce Street | Louisville, CO 80027

303.590.2365 office | 303.590.2351 fax

rhagens at envysion.com <mailto:rhagens at envysion.com>  | www.envysion.com
<http://www.envysion.com/>  | Visit our blog
<http://managedvideoblog.com/> 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.oetiker.ch/pipermail/rrd-users/attachments/20090520/0cf7dd40/attachment.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 3093 bytes
Desc: image001.jpg
Url : http://lists.oetiker.ch/pipermail/rrd-users/attachments/20090520/0cf7dd40/attachment.jpe