"Orchid XP v7" <voi### [at] devnull> wrote in message
news:4766a720@news.povray.org...

> Personally I prefer Oracle's lockless multiversion system - although
> obviously that has its own set of drawbacks.

oh, btw, Oracle also uses locks.
http://download.oracle.com/docs/cd/B28359_01/server.111/b28318/consist.htm#i
5704

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