rsync alternatives for large mirrors?

[Max Bowsher]

Mike Loseke wrote:
>  Anyone here ever use or see any tools (free or commercial) that are
> similar to rsync but maybe provide a little more in the way of
> reporting features? I'm looking into some possible alternatives to a
> system I have scratched together using rsync. I'm bumping into some
> issues involved more on the backend of my system (stats on directory
> structures and contents) which is limiting the amount of data I can
> sync in an 8 hour window to about 120GB. I'd like to be able to sync
> 300GB+ in the same timeframe and still get my backend tasks completed.
> 
>  Currently those backend tasks that are eating up a fair bit of time
> consist of doing a "du" like action on the trees at either end which
> is used to generate a report which can be referenced by users so they
> know when data is in sync. Ideally I'd like an "update as you go"
> sort of method but I haven't figured out a way to do this with rsync.
> I do use rsync's output stats in addition to my own.

Augment rsync's output stats to include everything you need?

Max.