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From sebb <>
Subject Re: Scalability and Stability of JMeter’s Distributed Mode
Date Fri, 24 Sep 2010 15:08:58 GMT
On 24 September 2010 15:52, Felix Frank <> wrote:
> On 09/24/2010 04:36 PM, sebb wrote:
>> On 24 September 2010 15:02, Deepak Goel <> wrote:
>>> Hey
>>> Namaskara~Nalama~Guten Tag
>>> To answer your last question it would have a max overhead of 5% on the
>>> network.
>> Huh?
>> How do you arrive at that figure?
>> The network traffic from server to client depends on the test plan
>> listeners and the server configuration.
>> And the percentage overhead surely depends on the current network traffic?
> Agreed. The actual overhead should be carefully measured and (if
> necessary) extrapolated for the specific use case.
> If it threatens to be a problem, you can use the system properties
> mode=Statistical and num_sample_threshold=X where X is the number of
> sampler results that are aggregated into a single value that is transferred.

And use as few listeners as possible, and don't try to return the sample data.

It's easy enough to create a simple test plan using the Java Test sampler.
Or you can use the HTTP sampler with a file: URL.
This can be used to test the client-server communications without
needing to contact the real servers.

If the additional load does prove too much, then just run the test
plan using non-GUI mode on all the servers independently, and combine
the results files.
This has been discussed many times on the mailing list.

> HTH,
> Felix
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