MRTG vs Nagios

hye all..

I like to know if anyone here can justify and make wise recommendation to me, whether to choose MRTG or NAGIOS as network Monitoring Performance.

If can, is there any website that provide comparison for both of them?

Ur help are highly appreciated..

Regards,
~unknown

Of my -brief- experience with both, MRTG is meant for creating pretty graphs of metrics and Nagios is meant for monitoring up/down of systems and services. Since you said your trying to monitor performace, then MRTG (and whatever scripts you in turn write) shold give you plenty of info on trends, etc in the performance category. If you want to get paged/emailed when X happens, you probably want nagios. Both are a little involved setting up, but they are really two different applications.