I'm starting to realy confuse myself... Check this out... and correct me if im
going in the wrong
direction...
Senerio:
I collect input & output octets stats from a network device every half hour.
I want to be able to show utilization from the same rrd database that I
draw my normal
line graphs from.. This is what I do>
for example:
[ NETWORK DEVICE ]
data at : 10:00am 10:30am
11:00am
34,000,000 900,000,000
200,000,000
< the above is how many octets flew by during the
last half hour>
< i think rrdtool stores the above value by dividing
it by 1800(1 half-hour)>
< if that is true that i should do the following in
order to get the utilization
as a percent for InOctets>
34,000,000 --> should be stored as 18888.88 i.e 34,000,000
/ 1800
10,000,000 --> should equal 10mb interface speed
OK now:
= ((1800*18888.88) / (( 10,000,000 / 8 ) * 1800 ) * 100
= ( 33,999,984 / ( 1,250,000 * 1800 )) * 100
1.51% = ( 33,999,984 / 2,251,440,000 ) * 100
39.97% = ( 900,000,000 / 2,251,440,000) * 100
8.88% = ( 200,000,000 / 2,251,440,000) * 100
Does the above look correct... or am I totally off base??
CoolC
Clarence Hart
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