On 20 October 2011 18:14, Adrian Speteanu <asp.ad...@gmail.com> wrote:
> Hey David,
>
> I've used both.
>
> Its not much to compare :). If you understand the Constant Throughput Timer,
> then you understand both and it's easy to see that its major limitation is
> that it holds (if possible) the throughput constant at the value you define
> (which was the intent). However if you want to easily create a more complex
> test scenario like:

The "constant" can also be varied. If the constant is expressed as a
variable or function reference, that allows the throughput to be
varied at will.

See for example:

http://jakarta.apache.org/jmeter/usermanual/best-practices.html#beanshell_server


>  1. run a test with throughput 100 for 2 min
>  2. continue for 2 more minutes with throughput 200
>  3. continue for 2 more minutes with throughput 500
> to see how the application responds to these changes in the load received,
> without the plugin you had to use more thread groups and configure the
> scheduling so you get the same effect. The plugin makes these use cases
> simple and more easy to understand.
>
> You can make things a lot more complicated than that if you'd like using
> both methods and a lot of imagination.
>
> On Tue, Oct 11, 2011 at 5:19 AM, David Luu <manga...@gmail.com> wrote:
>
>> I was wondering if anybody has used both, and wonder how they compare.
>> Pros/cons of each.
>>
>> And how one could best simulate the Throughput Shaping Timer with the
>> constant throughput timer via variable/property that defines the throughput
>> and changing it during test run. Particularly how would you implement the
>> changing of the throughput variable and where to place in test plan.
>>
>> FYI, I'm refering to this JMeter plugin:
>>
>> http://code.google.com/p/jmeter-plugins/wiki/ThroughputShapingTimer
>>
>

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