Wow, that's a cool PDF! I suspect it would be beneficial to have scaling information in a graphical format (e.g. you have so many requests per second, you need this number of CPUs, etc.) Unfortunately, there are two main barriers to producing one: 1. There is often not enough data. No single entity has configured Zope in a very broad range of applications and testing is required for each configuration. 2. For the configurations for which there is enough data, there are not many incentives to publish the information in this format. Most people here make their money on services, and obtaining enough data to come up with this chart is decidedly a service. The engine manufacturer is different inasmuch as they want to sell engines. Nobody here has any engines to sell. ;-) - C On Tue, 2003-09-02 at 07:50, Børge Kjeldstad wrote:

Hei,

recently I posted a question about the “Best possible Zope installation”. I received a lot

ofinteresting answers. Out of them I read that the best possible Zope installation was

dependenton, amongst other things, system requirements and user preferences.

Within these dependencies there were quite a few options and a complex picture

ofchoices. This made me think about how it would be to have a graphical presentation

of the various options and choices.

As my background is ship design and naval architecture rather than computer science

(I often wish it was the other way around :) ), I have come across some good graphical

visualizations for speed and power ranges of ship engines. These show pretty well

whatengine you should choose if you need a specific power and speed. Now I wonder

if it would be possible, and maybe beneficial, to have something similar for Zope?

These would then incorporate things like average and peak load, storage management,

securityand so on.

To give some idea of the concept, I include here the link to one of Wärtsilä Diesels publications:

http://www.wartsila.com/english/pdf/Marine/mps2003.pdf

WärtsiläDiesel is a main international ship engine supplier.

Browsing through this, in my opinion quite good, publication, will hopefully show some of the

benefitsof such graphical visualization. If there is any problem with this link; use for instance

googleto search for Wärtsilä Diesel, choose Wärtsilä Frontpage, choose Marine, choose

Publications, choose Marine Power Systems

Cheers

Børge Kjeldstad

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