I'm monitoring more than 300 servers, for that I'm using Ganglia. Which use RRD as database to collect and store data related the resources of each server. I would like to have a history about 2 years or more, so reading this article, I think that my RRA configuration should be :

RRAs "RRA:AVERAGE:0.5:1:17520"

17520 = (365 days [year] x 2) * 24 [hour]

This is Ganglia default configuration, which is running today:

#
# Round-Robin Archives
# You can specify custom Round-Robin archives here (defaults are listed below)
#
# RRAs "RRA:AVERAGE:0.5:1:244" "RRA:AVERAGE:0.5:24:244" "RRA:AVERAGE:0.5:168:244" "RRA:AVERAGE:0.5:672:244" \
#      "RRA:AVERAGE:0.5:5760:374"
#

Is that right my way of thinking or I'm missing something here ?

database linux rrdtool rrd ganglia
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