[rrd-users] Round Robin Archive Question

[Carsten Aulbert]

secrookie at gmail.com wrote:
> 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
> days)
> 			RRA:AVERAGE:0.5:144:1460
> 
> 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
> 


Looks fine to me, but I'm just a beginner as well. I would just run it, 
start filling some bogus values and generate some graphs. If that looks 
fine you are all set ;)

Carsten