Re: maximum data rates

[Jason <mmu...@ya...>]

during testing, for client: the cpu is pentium II 266 MHz with redhat9 & for server: the cpu is pentium 4 2GHz with redhat 7.3. I can change both client & server to pentium 4 cpu while the type of OS is not important to me, as long as the combination can generate max data rate possible.

Paul Hyder <Pau...@no...> wrote:Would need to know which operating system and the CPU speed of the "...two PCs." to
help much.

It is indeed not difficult to get single flows to over 90% of a GigE but you probably
need to tune buffers a bit. (e.g. On a dual 2.0GHz Opteron hardware with Linux.) If
you run Linux I can provide details of what to modify. For Windows and others see the
PSC url below.
Paul Hyder
NOAA Forecast Systems Lab

Synopsis:
General TCP tuning: http://www.psc.edu/networking/projects/tcptune/
Internet2 iperf/bwctl TCP Throughput: http://abilene.internet2.edu/ami/bwctl_status.cgi/TCP/now

Jason wrote:
> I can only manage to achieve 229Mbps on 1Gbps link using a gigabit hub in between two PCs. Any idea to increase the volume of traffic?
> 
> "Cottrell, Les" wrote:You can get around 960Mbps with iperf on a back to back 1Gbps link between two PCs. On a 10Gbps link one can get about 7.5Gbps, the limitation is the PCI-X bus.
> 
> 
> ---------------------------------
> From: own...@da... [mailto:own...@da...] On Behalf Of Jason
> Sent: Tuesday, May 24, 2005 12:09 AM
> To: Iperf Users
> Subject: maximum data rates
> 
> 
> 
> Dear all,
> 
> I try iperf on 100 Mbps link & it is able to generate tcp traffic up to 97 Mbps. Any one try on Gigabit link & what is the maximum data traffic it can generate? Also, any one using web100 with iperf, because I think Iperf alone can generate near 100 Mbps & I am not too sure what web100 uses are.
> 
> Thanks
> 
> 
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