On Feb 14, 2008, at 9:43 AM, Jim Fulton wrote:
On the other hand, it seems
clear that cross-storage references make the system as a whole
(software + people) less reliable.
I don't agree in general.
Uh. I thought we were talking about reported POSKeyErrors that would
not exist
if there were no such thing as cross-storage references. I don't
understand
what there is to disagree with here. Are you saying that cross-storage
references reduce the risk of other application-breaking conditions?
Perhaps I misunderstand, but low-level cross-site references seem
like "secret"
weakrefs. Maybe we'd be better off if they were explicit, higher-
level objects,
used and dereferenced intentionally where required.
I don't object to this approach. I'll note that we had an approach
like this before for Zope (mounts) and it had plenty of
disadvantages of it's own, including injecting Zope-specific code
into ZODB.
If someone can make something like this work without modifying
ZODB, I won't object.
Right. There is no reason for this approach to involve ZODB at all.
If broken "references" must be tolerated, I'm suggesting that they
should be dealt
with in application/Zope-level code, not in ZODB.
I think it would be easier to make the current multi-database
approach a bit more explicit. I'll probably do that.
Explicit is good.
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