Testing 4D server for a low bandwith/High latency

Scott Peters (11/21/08 10:12AM)
Walt Nellson (11/21/08 10:51PM)
David Adams (11/22/08 8:05AM)


Scott Peters (11/21/08 10:12 AM)

Environment

Just a thought -

Try doing multiple simultaneous downloads from FTP sites of large
files, go

to iTunes and watch a TV show. It WILL slow things down, having
witnessed

various end-users doing that here.  :)

Scott Peters

Director, Operations/Information Technology

NewsUSA, Inc

On 11/21/08 3:47 AM, "Michael Bond" <michaelbond1975@... wrote:

Does anybody know of a proxy server, or techniques, that I can use

with 4D Server and Client to simulate low bandwidth and high latency

network connections?

Walt Nellson (11/21/08 10:51 PM)

Environment

<<1407511759-1227308139-cardhu_decombobulator_blackberry.rim.net-484561511
-@...



Michael Bond wrote;

Does anybody know of a proxy server, or techniques, that I can use

with 4D Server and Client to simulate low bandwidth and high latency

network connections? I'm trying to test some speed complaints but I

can't get the network response time down to a noticable level.

Michael,

When I get user complaints about Client-Server performance, I test
using a Dialup connection. That tells me which forms and methods have
the biggest performance problem.

HTH,

Walt Nelson - Guam

Sent from my BlackBerry&AElig; wireless device

David Adams (11/22/08 8:05 AM)

Environment

<bb2da9a90811211305t5713aa51ra4d8fc95a3fbb7b4@...

On Fri, Nov 21, 2008 at 7:47 PM, Michael Bond
<michaelbond1975@... wrote:

Does anybody know of a proxy server, or techniques, that I can use

with 4D Server and Client to simulate low bandwidth and high latency

network connections?

Charles is an awesome traffic tracing and analysis tool that includes

a bandwidth control feature:

   http://www.charlesproxy.com/wiki/bandwidth_throttle

I've never used the throttle in Charles and would be grateful to hear

back with any first-hand reports about how it behaves in the

real-world.

Charles works on Windows, OS X, and Linux. There's no harm to trying

it out as you get 30 days for free.

I've found Charles pretty indespensible when working on SSL encrypted

materials. With my usual tools, the SSL data is nothing but a bunch of

gibbersih...as you would hope. Since Charles functions as a proxy, it

can display the decrypted SSL request before it is re-encrypted and

forwarded to the final target and the decrypted response before it is

re-encrypted and sent back to the requester. If this sounds like

man-in-the-middle attack it's because it is structurally identical to

a man-in-the-middle attack. As such, you'll see a warning that the

certificate can't be authenticated, do you want to continue? in your

browser. Makes you think twice before ever accepting such a thing in a

real situation again....

If you're working on Windows and not getting your proxy settings to

stick/be recognized globally, check out the proxycfg command line. (I

don't know about Vista, but under XP proxy settings set in Internet

Options don't always flow through easily when they should...proxycfg

can solve that problem very easily.)

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