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Subject Re: high-load remote testing
Date Thu, 30 Oct 2003 15:21:03 GMT
The controlling machine is very much a bottleneck, and the remote 
testing needs some attention before it will handle the kinds of loads 
you want.

Until then, running the separate instances separately will give you 
your best results.


On 29 Oct 2003 at 15:54, Veronica Baiceanu wrote:

> Hi,
> Our company will stress-test a commercial web application, and 
we are targeting a rate of 1700 hits/second on the application 
server. We are currently estimating whether we can use JMeter to 
achieve our goal. So far, I have tried JMeter remote testing using 2 
remote JMeter servers, and one controller. I haven't encountered 
major problems with this setup. However, it would help me to know 
if anybody successfully used JMeter for achieving a throughput 
comparable to the one we have in mind. 
> It would be particularly helpful to me to get some insights 
regarding the following issues:
> - I read that the controller can become a bottleneck in remote 
testing. Several suggestions were made to solve this problem. The 
ultimate solution would be giving up remote testing altogether. 
Instead, each test would be launched by hand from each machine, 
the times should be coordinated, the results gathered in CSV files, 
and then merged to get the overall results. I believe I might need at 
least 5 JMeter servers to get my workload, possibly even 10. I 
would rather use the remote setup. I wonder if anybody managed to 
run JMeter in the remote setup, with so many machines, and with 
my targeted workload.
> - It would be helpful if I could get any recommendations regarding 
the hardware I should use for the testing, i.e. the minimum 
indicated CPU speed and memory capacity for the machines. We 
could get 5-10 decent machines that we could dedicate to testing. I 
wonder if the JMeter resource consumption for large-scale tests 
could become so critical, that JMeter simply cannot be used. I 
would not expect the CPU consumption to be higher than for test 
tools written in C, but the memory consumption should clearly be 
higher. Any information about particular setups you used would be 
greatly appreciated.
> Thanks a lot,
> Veronica

Michael Stover
Yahoo IM: mstover_ya
ICQ: 152975688
AIM: mstover777

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