gigabit xfer speeds under linux

Rogers, Jamie jrogers at
Tue May 18 13:57:01 CDT 2004

I curious about your kernel/TCP setting to achieve your throughput.  Can you
list your relevant parameters and their settings?  


-----Original Message-----
From: Sean Dilda [mailto:agrajag at]
Sent: Tuesday, May 18, 2004 2:35 PM
To: Aaron Urbain
Cc: linux-poweredge at
Subject: Re: gigabit xfer speeds under linux

On Tue, 2004-05-18 at 14:00, Aaron Urbain wrote:
> As an aside, does anyone know whether the Broadcom cards in a 1750 are
> or not?
> I have another server (not dell) with the same cards (5704) and
> data between them using the Cisco (everything at 1000/FD) I'm only seeing 
> 30MB/sec (~240mbit) which is a bit pants really for GigE...
> (Second server is a Dual Opteron 248)

That is pretty slow for a gigabit.  However, its a believable transfer
speed for a harddrive.

If have a cluster of 1750's, all connected with some powerconnect
5224's.  Using ttcp transfering 16gigabyte chunks, I've gotten around
112MB/sec, both ways.

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