[rrd-users] Graphing Sparse Data

[Laack,Jacob C]

I am monitoring many services with Nagios and the data ends up in RRDs which I graph using pnp.  (I promise this is an rrd question.)  One type of service is only checked every 6 hours (instead of the normal 5 minutes) so only 4 pieces of data are put into the RRD file a day.  rrdgraph shows empty graphs for 4 and 24 hours since the data is so sparse.  Would it be possible to use CDEF (or some other rrdgraph magic) so that if the current plot point contains no data, it looks ahead into the RRD file and uses that data?  I've googled my problem and haven't stumbled upon a solution.  Thanks for your help.

Jake Laack
Alegent Health, Open Systems Engineer
11128 John Galt Blvd, Suite 500, Omaha, NE 68137
Phone: 402-717-1146, Pager: 402-398-6900 #2665

PLEASE NOTE: My e-mail address is now jacob.laack at alegent.org<mailto:jacob.laack at alegent.org>


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