[lug] Throttling rsync

[Jeff Schroeder]

Hey all--

Does anyone know if it's possible to throttle the bandwidth used by 
rsync between two servers?  I have a backup job that copies several GB 
of data from one server to another, across the internet.  Although most 
of the time I'd want backups to proceed lickety-split, in this instance 
there's no rush and more importantly I'm paying for bandwidth usage at 
the 95th percentile.  These bursts of traffic lasting an hour or more 
push my overall bandwidth levels upward, costing me money in 
surcharges.

I could probably hack something together using iptables or iproute2-- 
they could throttle bandwidth on a certain IP or something-- but I 
don't want to scale back the server as a whole.  It's just this single 
rsync process that needs to be slowed.

Any ideas?

TIA,
Jeff
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