[Zope] load testing for zope server..

[Chris McDonough]

OpenSTA (http://www.opensta.org) is a load modeling and generation tool 
that will allow you to at least roughly simulate the kind of behavior 
you predict against a Zope (or a few load-balanced Zopes).  There's no 
really good common metric for sharing performance numbers. "Hits per 
second" is sorta useless because one person's "hit" might be serving up 
100 bytes of static content, and another person's "hit" might be serving 
up 4MB of dynamically generated content).  One reasonable way to do this 
sort of testing is to come up with a reasonable expectation of response 
time.  Then you can make the claim "on platform 'P' under configuration 
'C' placed under load 'L',  method 'M' will never take longer than 'N' 
seconds."  Then set up configuration 'C' on platform 'P', model load 'L' 
using OpenSTA and hit the server with it, and make sure that while it's 
loaded up, make sure method 'M' never takes more than 'N' seconds with 
something like "ab" or a custom bit of Python.

I can tell you right away, you want more RAM.  ;-)  It's cheap and 
speeds things up.

sree wrote:
> Dear firends,
> Greetings!
> Has any body done load testing for zope on different os/ platforms.
> are there any tools avaiable to do the same.
> 
> For a project of mine, I need to run zope 2.4.3 on win nt 4.0 sp 6 with 
> P3-600 MHz and 128mb ram.
> The zope server may have 1-2 users authoring the site all the time.
> I ma start with 1500 object and 3 months down the line it may reach 
> 1,00,000 objects. How many users will be able to simultaniously browse 
> the site?. How do we calculate the max load that the zope server can 
> take?
> 
> Any sharing real life statistics will be of immence help.
> Regards,
>  -  sree
> 
> 
> 
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-- 
Chris McDonough                    Zope Corporation
http://www.zope.org             http://www.zope.com
"Killing hundreds of birds with thousands of stones"