[Schevo-devel] Newbie questions

David Binger dbinger at mems-exchange.org
Tue Oct 18 06:55:02 EDT 2005


On Oct 18, 2005, at 6:44 AM, David Binger wrote:

>  I think most applications
> really do care about transactions.  Second, MVCC is not automatic.
> The programmer must specifically add a _p_independent method to a  
> class
> that enables MVCC for instances of that class.  Third, the Zope 3
> source code has this line:
>
>> Connection.py:755:        # Does anything actually use  
>> _p_independent()?  It would simplify
>>
> which suggests that, in practice, actual use of MVCC is not common.

Looking at the Connection.py some more, I think I was wrong about the
role of _p_independent.  There is some kind of MVCC that does not
involve _p_independent and may be automatic and common.





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