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References: <1293461461444-3319388.post@n5.nabble.com>
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Date: Mon, 27 Dec 2010 17:48:54 +0200
Message-ID: <AANLkTinrF0fF9hcD+eqBKUTR_QmmRi=iPpndf1gsWJmq@mail.gmail.com>
Subject: Re: Multiple Jmeter Instances
From: Adrian Speteanu <asp.adieu@gmail.com>
To: JMeter Users List <jmeter-user@jakarta.apache.org>
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Hi guys,

In addition:
a.  If you suspect that the server behaves differently when receiving
requests from the same IP, you could double check this using the new feature
in version 2.4, ip spoofing (available only for the Http Request Http
Client  sampler). Note that some network admins might not be ok with this
practice and it is not recommended unless the test system is isolated from
the rest of the work network.

b.  When testing distributed (even with no server-client config), save the
logs (as .csv) to the disk and then load them both, after the test, into a
single & clean listener in order to properly compare with the previous
results (for example, throughput is tricky unless you aggregate all results,
from all jmeter servers instances).

Hope this helps.


On Mon, Dec 27, 2010 at 5:35 PM, Anthony Johnson <ansoni@gmail.com> wrote:

> Hello,
>    100 threads is not an over-whelming amount of load from my
> experience.  The 2 engine results would seem to show that the
> botteneck is somewhere in your test plan.
>
> One common problem is if you use lots of Listeners, I would try
> disabling some and see if your test improves on a single machine. For
> instance, the "View Results Tree" is very useful, but is also very
> heavy.  When cutting the test in half and putting on two machines, a
> listener type bottleneck would be lessened with extra CPU and less
> thread contention.
>
> if that doesn't help, you may want to include more details about your
> test, jmeter version, and environment.  An outline of the test would
> allow for a lot better insight.
>
> Good luck,
>
> Anthony
>
> On Mon, Dec 27, 2010 at 9:51 AM, alwaysbmore <alwysbmore@yahoo.com> wrote:
> >
> > I get two different totally different results. When running multiple
> JMeters
> > instances on multiples machines compared to a single Jmeter instance on a
> > single machine.  For example, If I'm looking to run 100 concurrent users.
> If
> > I run all 100 threads from a single machine the results are much lower,
> if I
> > were to run 50 threads on one machine and 50 on another.  Both instances
> are
> > run separate from each other, not as a master and server.
> >
> > I suspect, it might have something to do with all my how the server is
> > configured to accept request all coming from a single IP Address.
> >
> > Can anyone one confirm this, and give some feedback on what results
> should I
> > trust?
> > --
> > View this message in context:
> http://jmeter.512774.n5.nabble.com/Multiple-Jmeter-Instances-tp3319388p3319388.html
> > Sent from the JMeter - User mailing list archive at Nabble.com.
> >
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