[mrtg] RRD data format

[José Maria Costa Pereira]

Hi!

	I've recently started to collect data in rrd format. With the
rrdtool option fetch, I looked at the data rrd collects, but I couldn't
understand what values is he collecting (bits/s, bytes/s ...).

	Basically what I would like to know is what options are used to
create the database files (.rrd).

	I've already seen that there are two data sources named "ds0" (in
traffic) and "ds1" (out traffic). But I dont know what type are they
(COUNTER, GAUGE, DERIVE, ABSOLUTE) or how often are they read (default = 5
minutes). And, are there different RRAs (round robin archives) for daily,
weekly, monthly and yearly graphics ??


Thanks.

Jose Maria Costa Pereira



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