HI,

I am running mrtg on my locate eth card. The script that I got from
here http://www.geek.net.au/mrtg.html collects the data in 2 ways

perl -e '@a=split(/[:\s]+/,qx(grep eth0 
/proc/net/dev));$f="%.0f";$fmt="$f\n$f\n1\neth0
traffic\n";$s=sprintf $fmt,$a[2],$a[10];print $s; print STDERR $s;'`;

and

perl -e '$s1=1;$s2=$s1;$f="%.0f";$fmt="$f\n$f\n1\neth0sar 
traffic\n";$o=sprintf $fmt,(qx(/usr/bin/sar
-n DEV | grep eth0 | tail 
-2)=~/eth0\s+[^\s]+\s+[^\s]+\s+([^\s]+)\s+([^\s]+)/); print $o; print STDERR
$o;'`;

The reports are generating just fine but the output of the 2 reports are 
different. The Average Out
are almost exactly the same but the Average In is drastically different.

What is the difference between:

/usr/bin/sar -n DEV

and

grep eth0 /proc/net/dev

Is there 1 that is more accurate?

Thanks
Steve



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