«

Hey all,

Is there a tool to deliberately slow down network speed, add latency, reduce
bandwidth etc? Wanting to run it on a test server for reliability and sample
field testing of database going to be used in a WAN enviroment.

And while im here - is there such a thing as 1024x768 native 17" LCD screen?
As ive got a few 1280x1024 ones but this resolution is just too small on a
17" screen. - Even changing font size isnt good enough. Changing DPI causes
problems with too many programs, and cheap 19" LCD's look terrible!

Cheers all

Matt

"Matthew Strickland" <> wrote in
news:8LSSd.3709$:

> Is there a tool to deliberately slow down network speed, add
> latency, reduce bandwidth etc? Wanting to run it on a test
> server for reliability and sample field testing of database
> going to be used in a WAN enviroment.

www.netlimiter.com reduces bandwidth for Windows.

"Matthew Strickland" <> wrote

> Is there a tool to deliberately slow down network speed, add latency,
> reduce
> bandwidth etc?

yeah, it is called "bitstream"

Matthew Strickland wrote:
> Hey all,
>
> Is there a tool to deliberately slow down network speed, add latency,
> reduce bandwidth etc?

Yeah but I think Telecom have the patent on it and aren't sharing. They're
using it for UBS traffic.
--
~misfit~



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Matthew Strickland wrote:
> Hey all,
>
> Is there a tool to deliberately slow down network speed, add latency, reduce
> bandwidth etc? Wanting to run it on a test server for reliability and sample
> field testing of database going to be used in a WAN enviroment.

Yeah, it is called UBS

Matthew Strickland wrote:

> Hey all,
>
> Is there a tool to deliberately slow down network speed, add latency, reduce
> bandwidth etc? Wanting to run it on a test server for reliability and sample
> field testing of database going to be used in a WAN enviroment.

You can easily guesstimate:
Run the app in a 100mbit environment and note start times, response
times etc.
Say it takes 14 seconds to start, 4 seconds to respond.

The calculate WAN bandwidth - encryption (knock off a 3rd).
e.g. 1.5mbs *symmetric* will mean 1 mbit bandwidth.

Difference in bandwith is 100 times.

Therefore 14 secs * 100 = 1400 secs to start, 4 *100 = 400 secs to
respond. This is *not* gospel, merely indictive.

You may wish to look at terminal services or telnet etc over VPN/WAN as
an alternative.
E.

Matthew Strickland wrote:

> Hey all,
>
> Is there a tool to deliberately slow down network speed, add latency, reduce
> bandwidth etc? Wanting to run it on a test server for reliability and sample
> field testing of database going to be used in a WAN enviroment.
>
> And while im here - is there such a thing as 1024x768 native 17" LCD screen?
> As ive got a few 1280x1024 ones but this resolution is just too small on a
> 17" screen. - Even changing font size isnt good enough. Changing DPI causes
> problems with too many programs, and cheap 19" LCD's look terrible!

our dell ones at work do both 1280x1024 and 1024x768 nativly(as in looks
good)... the HP 17s dont, just 1280x1024

I hadn't seen them do two correctly, so yeah, I was impressed.

--
Dave.net.nz
reply addy is e
nice! http://www.dave.net.nz/images/link.jpg

In article <8LSSd.3709$>, "Matthew Strickland" <> wrote:
>Hey all,
>
>Is there a tool to deliberately slow down network speed, add latency, reduce
>bandwidth etc? Wanting to run it on a test server for reliability and sample
>field testing of database going to be used in a WAN enviroment.
>
*SNIP*

FreeBSD's dummynet and ipfw pairing will do all that and more. Can
introduce random packet loss, latency, congestion, you name it. Plenty
of examples out there on how to configure up what you're after. All you
need is a box with two NICs. It doesn't even need to be a flash box.

--
Matthew Poole Auckland, New Zealand
"Veni, vidi, velcro...
I came, I saw, I stuck around"

My real e-mail is mattATp00leDOTnet

On Wed, 23 Feb 2005 16:28:04 +1300, Matthew Strickland wrote:

> Hey all,
>
> Is there a tool to deliberately slow down network speed, add latency, reduce
> bandwidth etc? Wanting to run it on a test server for reliability and sample
> field testing of database going to be used in a WAN enviroment.


theres a thread about this on comp.unix.bsd.openbsd.misc
(although I'm willing to bet OpenBSD isnt your OS)
I'll copy and paste the relevant bits anyway
<Q>
The user of this machine often sends large emails (often 3 meg
or more) and when this happens , the rest of the network chokes. is
there a way I can limit the upload speed of a particular machine to
say 4k/s max? Does PF have some feature for this?!?

Yes. altq is what you are looking for.

If all you want to do is limit the bandwidth for a simgle machine, you
can set up a default queue with total bandwidth equal to total outgoing
capacity, then set up a subqueue with the max bandwidth you want that
machine to use, then write one or more rules which pass the traffic from
that machine on the smaller queue. Let the rest of the traffic you pass
use the default queue.

Whether you NAT or not should not affect your queueing. Your pass rule will
be something like

pass from $bandwidth_hogger to any port $allowed_ports \
keep state queue thin_pipe
pass from $rest_of_lan to any port $allowed_ports \
keep state queue big_pipe

- assuming of course you have defined bandwidth_hogger, allowed_ports,
rest_of_lan and the queues thin_pipe, big_pipe already.

My PF tutorial (http://www.bgnett.no/~peter/pf/en/) contains a few
reasonably clear examples lifted from real world use which are slightly
less complex than the ones in the excellent PF user guide.

HTH

--

Hardware, n.: The parts of a computer system that can be kicked

Not to mention Orcon for jeez well, anything...

~misfit~ wrote:
> Matthew Strickland wrote:
>
>>Hey all,
>>
>>Is there a tool to deliberately slow down network speed, add latency,
>>reduce bandwidth etc?
>
>
> Yeah but I think Telecom have the patent on it and aren't sharing. They're
> using it for UBS traffic.
> --
> ~misfit~
>
>
>
> ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
> http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
> ----= East and West-Coast Server Farms - Total Privacy via Encryption =----