[CentOS-mirror] Two noob questions

Hi all,

I've mirrored CentOS (http://centos.alteeve.com), initially to be a local mirror for our DC. I've been thinking about making it publicly available, but I was concerned about the load it might place on the server. I remember seeing somewhere an estimate on the bandwidth to expect, but I seem to fail at Google and can't find that again.

So, first question; If I become a public mirror on a server with a 100Mbit connection, will my uplink likely become saturated?

Second question; with regards to locking to prevent rsync calls from overstepping one another, what do most people do? The docs said to ask here. :)

Cheers!