Just a note on this thread, we got everything sorted out. There was a
little asymmetric routing going on, but the great folks at HGC was very
quick in helping us fix this.
We had some problem with HGC support at the Hutch before, but they are
great and fast now. At the other end in Johannesburg, we
On 7/11/2013 10:32 AM, Clayton Zekelman wrote:
It all depends on the air speed velocity of an unladen swallow, and
varies if it is African or Eurpoean.
In all seriousness, you need to know the speed and latency of the link
before that question can be answered.
At 10:04 AM 11/07/2013, Luan Nguy
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 wrote:
Thursday, July 11, 2013 10:30 AM
To: Luan Nguyen
Cc: nanog@nanog.org
Subject: Re: File transfer speed between Hong Kong and Johannesburg, South
Africa
Honestly, this depends on what OS you are using. Anything prior to Win7 you
are likely to suffer from the TCP stack. Add in anything we
Hey Luan,
Here is a good guide that will help you optimise your throughput. As for
knowing the average, it all depends on pipe size, network topology, end host
configurations to even conjure a guess.
http://bradhedlund.com/2008/12/19/how-to-calculate-tcp-throughput-for-long-distance-links/
-J
TU on links..
>>
>>
>> Sent from my Mobile Device.
>>
>>
>>
>> Original message ----
>> From: Luan Nguyen
>> Date: 07/11/2013 10:16 AM (GMT-08:00)
>> To: nanog@nanog.org
>> Subject: Re: File transfer speed bet
On 11/07/2013 18:14, Luan Nguyen wrote:
> 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 s
ginal message
> From: Luan Nguyen
> 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.
Look at your MTU on links..
Sent from my Mobile Device.
Original message
From: Luan Nguyen
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
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 ti
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/
It all depends on the air speed velocity of an unladen swallow, and
varies if it is African or Eurpoean.
In all seriousness, you need to know the speed and latency of the
link before that question can be answered.
At 10:04 AM 11/07/2013, Luan Nguyen wrote:
Hello folks,
Does anyone know wh
Probably quite nasty delays as anything over a few milliseconds delays
really badly affects SMB
around 90 ms it's just about usable and above 120 ms forget it.
have a look at some of the WAN accelerator products esp Aryaka who'll be
able to set you up in minutes with no capital outlay..
http://ww
On Thu, 11 Jul 2013, Luan Nguyen wrote:
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?
Worst case would be that XP is involved, then you're going to be limited
by xmodem-like behav
Honestly, this depends on what OS you are using. Anything prior to Win7 you
are likely to suffer from the TCP stack. Add in anything weird like ICMP
filtering, load balancers or something else that eats the packets you are going
to see varying results.
- Jared
On Jul 11, 2013, at 10:04 AM, L
A pointer here: http://en.wikipedia.org/wiki/Bandwidth-delay_product
Cheers
Chris
---
-= Amat Victoria Curam =-
> Date: Thu, 11 Jul 2013 10:04:52 -0400
> Subject: File transfer speed between Hong Kong and Johannesburg, South Africa
> From: luan20...@gmail.com
> To: nanog@nanog.org
>
> Hello
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