[rrd-users] Round Robin Archive Question

secrookie at gmail.com secrookie at gmail.com
Fri Apr 4 07:30:45 CEST 2008

I am planning to create a database to hold data from 2 interfaces on
PIX.  Sampling will be 300 secs with 4 data sources.

Does the calculation look correct for the number of days I would like to keep?

#rrdtool create /var/lib/rrd/pix.rrd -s 300	\
			DS:ifIn1:DERIVE:600:0:12500000 	\
			DS:ifOut1:DERIVE:600:0:12500000 \
			DS:ifIn2:DERIVE:600:0:12500000 	\
			DS:ifOut2:DERIVE:600:0:12500000 \
		#	(300secs*576rows)=172800sec 172800/3600=48 hours		
			RRA:AVERAGE:0.5:1:576 			\
		#	(300secs*672rows)*6=1209600sec 1209600/3600=336hours (14 days)
			RRA:AVERAGE:0.5:6:672 			\
		#	(300secs*732rows)*24=5270400sec 5270400/3600=1464hours (61 days)
			RRA:AVERAGE:0.5:24:732 			\
		#	(300secs*1460rows)*144=63072000sec 63072000/3600=17520hours (730

I would also like to keep some MAX, MIN, LAST (same as current?)
values.  I presume I could just add extra lines for the duration I
want to keep the data?

RRA:MIN:0.5:1:576    # 48 hours
RRA:MAX:0.5:1:576   # 48 hours
RRA:LAST:0.5:1:576   # 48 hours


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