Cheshire Cat Computing

range in userdefined graph

2004-08-21T11:56:43+13:00

How about using the power of MRTG to do this?

For example, just define a new Target

Target[cachesaving]: #7/24:public@yyy:::::2 - #3/34:public@yyy:::::2
MaxBytes[cachesaving]: (insert the bandwidth of your link here)
routers.cgi*Options[cachesaving]: scaled
Legend1[cachesaving]: Saved incoming bytes
Legend2[cachesaving]: Saved outgoing bytes

This would probably achieve what you want, although at the expense of a couple of extra SNMP lookups and an extra .rrd file.

Steve

Statistics: Posted by stevesh — Sat Aug 21, 2004 11:56 am

range in userdefined graph

2004-08-21T02:44:16+13:00

Statistics: Posted by disorganizer — Sat Aug 21, 2004 2:44 am

range in userdefined graph

2004-08-21T01:39:51+13:00

yes, that works, but the problem is the scale:

if the interfaces have 50 and 55 mbit/s peak load, you will hardly see the 5mbit/s.
especially when the lower rates are near 0.

background:
i want to measure the internet traffic which is saved by the internet cache :-)
so i measure the lan-port of the cache device and the serial port of the internet router.

Statistics: Posted by disorganizer — Sat Aug 21, 2004 1:39 am

range in userdefined graph

2004-08-20T10:44:29+13:00

Statistics: Posted by stevesh — Fri Aug 20, 2004 10:44 am

range in userdefined graph

2004-08-20T05:38:58+13:00

hy steve,

i tried to do the following:

i have 2 lan interfaces for which i get the in/out bps.
what i wanted to have is a range-graph of both input values ranged and a second graph with both output-values ranged.

now i tried the following:
routers.cgi*Graph[INT-A]: combined-out noi #00FF00
routers.cgi*Graph[INT-A]: combined-in noo #00FF00
routers.cgi*Graph[INT-B]: combined-out noi #0000FF
routers.cgi*Graph[INT-B]: combined-in noo #0000FF

routers.cgi*InCompact[_combined-out]: no
routers.cgi*InSummary[_combined-out]: yes
routers.cgi*Options[_combined-out]: nomax nototal
routers.cgi*GraphStyle_combined-out]: range

routers.cgi*InCompact[_combined-in]: no
routers.cgi*InSummary[_combined-in]: yes
routers.cgi*Options[_combined-in]: nomax nototal
routers.cgi*GraphStyle_combined-in]: range

...

but as i expected this doesnt work, as routers.cgi cals the range between the in/out values of each device.

how could i achieve what i want? a range between the in-interfaces of 2 devices / the out-interfaces of 2 devices?

one alternative of course would propably be the gather the real in-value of one device as a mrtg-in of a virtual device and the real in-value of the other device as mrtg-out of a virtuel device.
but his would mean i have to double-poll a device, which i would prefer the prevent.

maybe this could lead to a new feature proposal for the next version :-)

another nice thing would be to have mrtg calc the differene betwen 2 in values of a device and show that as graph :-)

Statistics: Posted by disorganizer — Fri Aug 20, 2004 5:38 am