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From "Noel O'Brien" <nobr...@newbay.com>
Subject Re: Simulating QoS and Speed
Date Mon, 09 Mar 2009 16:56:00 GMT
On Monday 09 March 2009 16:37:13 sebb wrote:
> On 09/03/2009, Noel O'Brien <nobrien@newbay.com> wrote:
> > Hi All,
> >
> >  I've been asked to simulate real traffic for our system using JMeter in
> > relation to file uploads in terms of Quality of Service (approx 60%) and
> > realistic upload speeds.
> >
> >  Quality of Service seems reasonably possible with JMeter as its a matter
> > of structuring samplers under a number of random and/or throughput
> > controllers.
> >
> >  Simulating realistic upload speeds seems much harder. I'm told that
> > clients will upload files to our server at approx 5 - 20 kbps, and to
> > simaulte this correctly, I'll need to throttle the connection the sampler
> > makes, rather than adding a delay timer. Is there a way to simulate this
> > in JMeter? Nothing jumps out at me and I don't recall seeing anything in
> > the User Manual to achieve this. Has anyone else had to deal with this
> > situation? Does anyone have any thoughts on how this could be achieved?
>
> jmeter.properties:

Excellent, I'd been using the Java HTTP Request sampler, so had missed this.

> # Define characters per second > 0 to emulate slow connections
> #httpclient.socket.http.cps=0
> #httpclient.socket.https.cps=0
>
> Only works with HttpClient version of HTTP sampler.

Does characters per second directly relate to speed? e.g. 20000 CPS  == 20kbps

Regards,
Noel

> >  Regards,
> >
> > Noel
>
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