mod_bandwidth and mod_throttle is the two mostly used non-hardware methods of limiting bandwidth usage for virtual clients.
mod_bandwidth and mod_throttle are very different:
mod_bandwidth, which, although quite configurable, doesn't allow bandwidth bursts, so if your server is busy it could leave a feeling that connectivity is pretty bad.
mod_throttle, on the other hand, is a statistical throttling module, so it allows your sites to cope with high demand while not exceeding their transfer allowance.
on
www.youza.com we dont use any of them
