[164409] in North American Network Operators' Group
Re: File transfer speed between Hong Kong and Johannesburg, South
daemon@ATHENA.MIT.EDU (Warren Bailey)
Thu Jul 11 13:36:54 2013
From: Warren Bailey <wbailey@satelliteintelligencegroup.com>
To: Luan Nguyen <luan20176@gmail.com>, "nanog@nanog.org" <nanog@nanog.org>
Date: Thu, 11 Jul 2013 17:36:24 +0000
In-Reply-To: <CABX54rfH0P2cWZR=WBQ96=u2+hFFa-=0KXSB6_UXOrXhRjy42w@mail.gmail.com>
Reply-To: Warren Bailey <wbailey@satelliteintelligencegroup.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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-equatio=
n)
>
> 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 t=
he
> 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
>
>
