[Zope-dev] Re: DateTime mess

[Tres Seaver]

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Philipp von Weitershausen wrote:

> Andrew Milton wrote:

>>-1 for any scheme that involves diddling the ZODB to 'fix' pickles, because
>>   you just know you're going to corrupt someone's ZODB, and that's just
>>   noone's idea of fun.
> 
> There are sensible ways of upgrading the ZODB. Zope 3 has had it since
> 3.0 (called generations) and they've been working reasonably well for
> these things.

They aren't well-enough "battle tested" to make Andrew's point invalid,
I think (there *are* no "large" ZODB-based Zope3 sites which have
undergone generational upgrades).

Frankly, anything which attempts to "fix pickles" in-place smells bad to
me.  "Dump and reload" is how the RDBMS world handles this kind of
problem, and it isn't because they don't have smart folks working on them.


Tres.
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Tres Seaver          +1 202-558-7113          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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