David, I seem to recall from somewhere that using Data.fs was in some sense more complete, or more supported, or more something from some old migration guide, so I was shying away from doing an export/import. Also there is the time involved in exporting/importing each site in the instance.
However, I gave it a try. When I did, I notice this text in 3.3.5: """ Note: Zope can export/import objects in two dfferent formats: a binary format (called ZEXP) and as XML. The ZEXP format is the officially supported export/import format for moving data between identicial Zope installations (it is not a migration tool). The XML export/import is unsupported (and possibly broken under certain circumstances) - use it at your own risk. """ It is the "it is not a migration tool" part plus that "identical" is underlined that worries me a bit. In any case, the import into an empty 4.0.0 failed in my case with: """ Site Error An error was encountered while publishing this resource. Error Type: ImportError Error Value: No module named LargePloneFolder """ which I guess means (1) I have been using Plone too long :-) and (2) I have to find and somehow try to get rid of LargePloneFolder objects somehow before migrating?? Thanks for the tip, though, maybe it will work if I can figure out how to proceed. Perhaps I will be able to get to Plone 4 one of these days ;-) I have be extremely strict about using any third-party add-ons, just so migration would go smoothly. Looks like this time it is old Plone stuff itself that it getting in the way. (BTW, we only use only one add-on: PloneFormGen.) /Mike On 09/09/2010 04:25 PM, David Glick wrote: > Mike, we successfully upgraded an old Plone site whose database > contained ZODB versions by ZEXP-exporting the entire thing, then > reimporting into a fresh database. > > David > ---------- > David Glick > Web Developer > davidgl...@groundwire.org > 206.286.1235x32 > > Groundwire: You Are Connected > http://groundwire.org _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev