Re: File transfer speed between Hong Kong and Johannesburg, South Africa

[Martin Hepworth <maxsec () gmail com>]

also check the steelhead isn't getting swamped by too many connections. The
Units are rated at and have a fixed max number of connections per device.If
you need more connections you need a bigger/more costly device.

-- 
Martin Hepworth, CISSP
Oxford, UK


On 11 July 2013 18:14, Luan Nguyen <luan20176 () gmail com> wrote:

> Thanks guys.
>
> We do have Riverbed Steelhead appliances at both end.
> According to calculation, maximum throughput can be attained is ~330KB/sec.
> With the Riverbed "cold" transfer, we should get ~600KB/sec. But I can only
> get ~250KB/sec with the Steelhead doing its stuff for 500M file so plenty
> of time for whatever to kick in.  Iperf and netperf show great results
> though.
> I guess I will be sampling results hourly for comparison.
>
> Regards,
>
> -Luan
>
>
> On Thu, Jul 11, 2013 at 11:37 AM, Joe Loiacono <jloiacon () csc com> wrote:
>
> > The maximum you can expect is:
> >
> > Rate < (MSS/RTT)*(1 / sqrt(p)) where p is the probability of packet loss.
> >
> > Credit: Mathis, Semke, Mahdavi & Ott in Computer Communication Review,
> > 27(3), July 1997, titled The macroscopic behavior of the TCP congestion
> > avoidance algorithm.  (
> http://www.infoblox.com/community/blog/tcp-performance-and-mathis-equation
> )
> > Joe
> >
> > [image: Inactive hide details for Luan Nguyen ---07/11/2013 10:06:19
> > AM---Hello folks, Does anyone know what's the average speed for wi]Luan
> > Nguyen ---07/11/2013 10:06:19 AM---Hello folks, Does anyone know what's
> the
> > average speed for windows file transferring
> >
> > From: Luan Nguyen <luan20176 () gmail com>
> > To: nanog () nanog org
> > Date: 07/11/2013 10:06 AM
> > Subject: File transfer speed between Hong Kong and Johannesburg, South
> > Africa
> > ------------------------------
> >
> >
> >
> > Hello folks,
> >
> > Does anyone know what's the average speed for windows file transferring
> > (SMB2) between Hong Kong and Johannesburg?
> > Any guide on how to calculate/estimate this?
> >
> > Thanks.
> >
> > Regards,
> >
> > -Luan