Look at your MTU on links..
Sent from my Mobile Device. -------- Original message -------- From: Luan Nguyen <luan20...@gmail.com> Date: 07/11/2013 10:16 AM (GMT-08:00) To: nanog@nanog.org Subject: Re: File transfer speed between Hong Kong and Johannesburg, South Africa 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 <jloia...@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 <luan20...@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 > >
