Calculations of RRD data

[Marc Powell]

On Aug 8, 2010, at 1:47 PM, Stephen H. Dawson wrote:

> We really do not want to put the monitored data into a SQL database.  How (hopefully) does one do arithmetic calculations of data in an RRD database, please?

You can do it directly with through rrdtool (i.e. 'rrdtool graph...'). CDEF's and VDEF's can have an arbitrary RPN calculation performed on them.  This might help --

http://oss.oetiker.ch/rrdtool/doc/rrdgraph_data.en.html#CDEF

--
Marc


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