[ZODB-Dev] Re: [ZCM] [ZC] 875/ 6 Comment "FileStorage packing bug: backpointer not resolved"

[Toby Dickenson]

On Tuesday 06 May 2003 8:12 pm, Collector: Zope Bugs, Features, and Patches 
... wrote:

> A question about the patch.  It looks like the change means that back
> pointers are always resolved during pack.  Is that right?  If so, it means
> that when we're done there are no backpointers in the storage; every
> backpointer has been replaced by a copy of the actual data.
>
> We need backpointers to get undo semantics right.  They also save space.


This problem is only triggered if an undo is performed during pack, right?

Would it be appropriate to issue a patch or hotfix to block undo during 
packing? This would prevent the possibility of data loss by masking the 
problem, until a proper fix can be issued.


-- 
Toby Dickenson
http://www.geminidataloggers.com/people/tdickenson