Hi all!

I'm interested in installing RRDTool on my FreeBSD box.
I searched the web and found a nice tutorial:

Using SNMP and RRDTool on FreeBSD

But there's a section where I have doubts:

( ... ) 
Your database can only hold a fixed amount of data. Once this database has
been "filled" with new data, the oldest data is overwritten. In this way,
the data entry goes in a round robin, and ultimately there is no "start" or
"end" to the database. It is just one loop.
( ... )

What type of database does RRD create? If the database is filled with new
data and the oldest is overwritten then how can RRD generate a timeline
graph? What's this "loop" thing?

Basically, I want a way to gather information on the number of inbound
packets/bytes on my machine and create a graph to analize the traffic
growth on a month-by-month basis (e. g.).


Best Regards to all
-- 
Adira já ao Net Dialup Light. Acesso profissional gratuito.
NovisNet, a Internet de quem trabalha. http://www.novisnet.pt

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