Look at your MTU on links.. Sent from my Mobile Device. -------- Original message -------- From: Luan Nguyen <luan20176@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 <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