Cacti created rrd files - have I understood correctly?

Hi all,

For this example I am using Cacti to graph network traffic on routers
and switches. The output below is a typical rrd file created by Cacti
when adding a new router or interface to Cacti. In this case, we are
graphing a router sub-interface. If I am understanding correctly this
rrd file contains two data streams, one which contains an average
throughput which is the interface throughput but becomes consolidated
over time, and another (MAX) which is the actual router interface
throughput that is never consolidated and contains the raw figure
Cacti has pulled from the router. Is that correct?

Many thanks,
James.

root@server:/var/lib/cacti/rra# rrdtool info router-interface.rrd
filename = "router-interface.rrd"
rrd_version = "0003"
step = 300
last_update = 1372951518
ds[traffic_in].type = "COUNTER"
ds[traffic_in].minimal_heartbeat = 600
ds[traffic_in].min = 0.0000000000e+00
ds[traffic_in].max = 1.0000000000e+09
ds[traffic_in].last_ds = "2844749158"
ds[traffic_in].value = 7.4157411000e+05
ds[traffic_in].unknown_sec = 0
ds[traffic_out].type = "COUNTER"
ds[traffic_out].minimal_heartbeat = 600
ds[traffic_out].min = 0.0000000000e+00
ds[traffic_out].max = 1.0000000000e+08
ds[traffic_out].last_ds = "770721020"
ds[traffic_out].value = 1.6617503700e+06
ds[traffic_out].unknown_sec = 0
rra[0].cf = "AVERAGE"
rra[0].rows = 230400
rra[0].pdp_per_row = 1
rra[0].xff = 5.0000000000e-01
rra[0].cdp_prep[0].value = NaN
rra[0].cdp_prep[0].unknown_datapoints = 0
rra[0].cdp_prep[1].value = NaN
rra[0].cdp_prep[1].unknown_datapoints = 0
rra[1].cf = "MAX"
rra[1].rows = 230400
rra[1].pdp_per_row = 1
rra[1].xff = 5.0000000000e-01
rra[1].cdp_prep[0].value = NaN
rra[1].cdp_prep[0].unknown_datapoints = 0
rra[1].cdp_prep[1].value = NaN
rra[1].cdp_prep[1].unknown_datapoints = 0

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