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From "Thom Hehl" <T...@pointsix.com>
Subject RE: Advice
Date Fri, 06 May 2011 13:24:23 GMT
OK.

I need to simulate 250 devices in the field. Each of these devices is
one of 1/2 dozen types of sensors that read whatever, often temperature,
and send it's information along via UDP packet to the host. The packets
are time encoded and must be sent sequentially for me to simulate the
load I wish.

If I use Felix's approach, would I just have one set of packets that
would get run 250 times?

-----Original Message-----
From: sebb [mailto:sebbaz@gmail.com] 
Sent: Friday, May 06, 2011 9:22 AM
To: JMeter Users List
Subject: Re: Advice

Maybe we could help more if you described the scenario in terms of the
external requests that you want to make.

For example, for a web site this might be:
GET URL 1
POST to URL 2 with parameters a,b,c
etc.

On 6 May 2011 14:12, Thom Hehl <Thom@pointsix.com> wrote:
> Nuts!
>
> OK, so what I think you're telling me is that I can set up thread
> variables and alter the individual packets so that they are compatible
> with the thread that they're running.
>
> The problem is that I can't do that. The packets from each device that
I
> have captured MUST run sequentially. I can't guarantee that with
jmeter
> picking which packet to run with which thread, so I can't use this
> solution if that's what you're telling me.
>
> So, then, we're back to square 1. How do I simulate these 250 devices
> with their 1,000-2,000 packets apiece that must be run sequentially?
>
> -----Original Message-----
> From: Felix Frank [mailto:ff@mpexnet.de]
> Sent: Friday, May 06, 2011 9:09 AM
> To: JMeter Users List
> Subject: Re: Advice
>
> On 05/06/2011 02:56 PM, Thom Hehl wrote:
>> Each UDP thread will represent a single device. The HTTP threads will
>> look at data with each HTTP user receiving 5 of the devices. I don't
>> have to wait until all of the UDP threads are done, just one from
each
>> device so the devices are all set up.
>>
>> I think, therefore, that the HTTP requests will be in their own
thread
>> group.
>
> Fair assumption.
>
> Don't use rampup in the HTTP group though - use the "Startup delay".
>
>> Everything I read about CSV data configuration is about assigning
>> variables. What I need to know is how to control the UDP Sampler
> packets
>> using these variables.
>
> Sorry, beats me. Looking at the TCP sampler, I would use variables in
> the "Text to send" field. My text to send could be 'This is the sample
> input ${MY_INPUT} end' or somesuch.
> Here, MY_INPUT would have been a variable I seeded e.g. using a CSV
> dataset config.
>
> I have no idea how that UDP sampler works in comparison.
>
> Regards,
> Felix
>
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