[rrd-users] rrd - graphing data along with trend

[Yoni ben-shlosh]

Hey, rrd experts ...
 
a simple question :
i have RRD db, which stores 2 years of 5 minute polls (about 210K).
now i want to show a graph for several monthes which shows one line of
actual polls (consolidated by average) , and a second line within 
the graph that shows the average per each month 
(the average on each month is the same all month long...)
from that second line, i should be able to determine the trend .
 
how can that second line be defined (if at all) ??
any kind of idea would help.
 
Thanks alot.
Yoni
 
 

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