I'm contemplating moving datacentre and I need to know the size of pipe I'll need in order to get a quote.
Currently I'm charged on GBs of traffic per month (currently about 42GB inbound - so requests only) but the new mob would rent me a pipe instead and the size of it determines the price.
I have a number of Centos web servers and one database server behind a loadbalancer; the webservers access the database server but the public do not (directly, that is).
The obvious place to measure bandwidth utilisation is at the loadbalancer but I don't have access to it and my current datacentre want an arm and a leg to monitor it for me.
Is this something I can easily do from my Linux web servers?
I've started to look at tools like ntop and bandwidthd but thought I'd seek some expert advice from here first.
I guess what I need to do is look at traffic between each webserver and the IP of the loadbalancer and add them together. Tools like ntop show traffic between the servers and the remote IP but not between the server and an intermediary IP...
Any clues anyone?