On Thu, Feb 10, 2005 at 04:44:19PM -0500, Mosseveld, Adriaan wrote:
> Our Netbackup infrastructure is based around an E450 with gigabit
> connectivity.
> 
> For some reason, it is impossible for us to get a throughput on the (ge)
> Gigabit card of greater than 10Mb/sec. We have tried a direct connection
> between the server and an E220R with a ce gigaswift card, with exactly the
> same results (therefore ruling out the switch).
> 
> We have tried using Netbackup, ftp, dd (with remote shell), but all showed a
> similar throughput.

I think you need to look at tuning your TCP stack.  Look at your OS
documentation for how to change your TCP send and receive buffers.  Also
if your switches can support jumbo frames try turning that on.

A quick google search for gigabit ethernet tuning should turn up some
useful information.

Regards,
Dale