[ZWeb] DISCUSS: Migration armageddon
Tue, 07 May 2002 17:06:20 -0400
Howdy. I'd like to put an issue in front of the nzo team and get some
We have a big and scary challenge facing nzo. Getting content out of
czo (current zope.org) and into nzo (new.zope.org) has turned into a pit
of despair. The next step isn't clear.
Background information: czo has a bunch of Zope 2.3 objects, mostly as
ZClasses and stock zope objects. There are special cases and business
rules that have accumulated over the years that make it a challenge to
get a grip on what's there.
Likewise, there is a nzo software setup that is really different from
nzo (CMF/Zope 2.5.x), also with some of its own business rules.
We need to get content from czo -> nzo in a repeatable way. Presumably
this means multiple passes as we go throught milestones on the way to
To facilitate this, Tres' team here wrote some migration scripts that
try to express all the exceptional conditions and business rules for the
transformation. This migration script *used* to work. It doesn't work
now. ChrisM spent two days trying to address this and ran into all
kinds of nasty things.
Here's the challenge: we've now used up the allotted time for Chris and
we can't migrate the czo content.
It appears that these are some of the options:
a. Wait (for an indeterminate amount of time) for Chris to become
b. Try to run nzo in parallel with czo and find someone to provide links
between the two.
c. Somebody think up a different approach to migration.
I'm open to suggestions on this. Realistic suggestions are preferred. :^)