[164410] in North American Network Operators' Group
Re: File transfer speed between Hong Kong and Johannesburg,
daemon@ATHENA.MIT.EDU (Luan Nguyen)
Thu Jul 11 13:51:33 2013
In-Reply-To: <ccif56q9btuhm2sn5tmmfk9n.1373564179496@email.android.com>
Date: Thu, 11 Jul 2013 13:51:02 -0400
From: Luan Nguyen <luan20176@gmail.com>
To: Warren Bailey <wbailey@satelliteintelligencegroup.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Is there a tool to do that end to end? Path MTU discovery tool?
We use GRE/IPSEC with a WS-IPSEC 3 setting the tunnel to MTU 1400 with MSS
= 1360 both end.
The steelhead set to 1400 MTU as well since I was told the steelhead will
set the DF bit.
Steelhead log doesn't show timeout, unable to connect/ retry or anything to
suggest drop packets though.
Thanks.
Regards,
-Luan
On Thu, Jul 11, 2013 at 1:36 PM, Warren Bailey <
wbailey@satelliteintelligencegroup.com> wrote:
> 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
> >
> >
>
