ZoDB's capabilities

[Almad]

Hello, 

I'm going to write a custom CMS. I'd like to use some odbms, as code is then
much more cleaner...however, i'm a little bit scared about capabilities of
ZoDB, when compared with f. e. Firebird. 
How much instances is Zodb able to handle? Under "handle" I mean "in real
time", not "theoretically". I'd like to use it for dynamic portal with
about 2000 - 3000 UIP / day. 

And, how is it with stability and crash recovery? I can't find some more
sources about zodb, when there are some other sources then those on Zope,
please tell me. Or, please tell me if you knew some better odbms engine ^_^

Thanks, 
-- 
Lukas "Almad" Linhart

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