Re: [Geoserver-devel] Geoserver Stress Testing

[Andrea A. <and...@ge...>]

On Fri, Jan 28, 2011 at 9:40 PM, Luca Morandini <lmo...@ie...> wrote:
> On 01/28/2011 04:36 PM, Justin Deoliveira wrote:
>>
>> I would recommend
>> to download and install apache jmeter, and create your own test suite that is
>> tailored to your exact data. It is very easy with jmeter to simulate very heavy
>> loads on the server.
>
> I do agree... just do not forget to use pseudo-random number generators (jMeter
> has them) to change the bbox in order to avoid over-estimating GeoServer
> performance (I know, GeoServer doesn't cache, but there are other components, like
> DBMSes, that may do it).

What we do at FOSS4G to ensure comparability is to use a script
generaring thousants
of random bboxes with certain attributes (such as min and max size,
included in the
data area and so on) and then store them in a csv file.
JMeter reads that file during the load, that ensures randomness but
also that the
various servers do the exact same workload.
In theory if we had a long enough series of request it would not
matter to actually
have a reproducable list, but in practice we cannot afford to have
servers run for
that long, especially since there are 6-8 servers participating to the
effort and the
testing server is just one ;-)

Cheers
Andrea

-- 
Ing. Andrea Aime
Technical Lead

GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054  Massarosa (LU)
Italy

phone: +39 0584962313
fax:     +39 0584962313

http://www.geo-solutions.it
http://geo-solutions.blogspot.com/
http://www.linkedin.com/in/andreaaime
http://twitter.com/geowolf

-----------------------------------------------------