[rrd-users] Confusion and seeking help with RRDtool

[Derek Belrose]

Alright, so I'm running mrtg-2.9 with rrdtool 1.0.40 on a HP ProCurve 
Switch.  I do a snmpget on the router:

snmpget ip public interfaces.ifTable.ifEntry.ifOutOctet.1
and that returns:
interfaces.ifTable.ifEntry.ifOutOctets.1 = Counter: 2103368116

What does MRTG/RRDTool do to this number in order to enter the 
information into the database?  Does it just add it as is?  Does it take 
the difference between this number and the number prior?

Also, when I do a rrdtool fetch on the database I get a string of 
numbers in scientific notation.  What is this number in?  When I do a 
graph, I notice the values are actually 10 times less than a reasonable 
amount.  Am I doing something wrong here?

In order to correct the graphs I had to do a CDEF:actual=in,10,* and 
that does work.  But some of the data I'm trying to calculate doesn't 
come out so I need to know what does MRTG store the data as: bits, 
kbits, whatever.

Any information will be appreciated greatly.


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