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On 5/27/10 10:03 , Raphael Ritz wrote:
> David Glick wrote:
>>> [..]
>> If I recall, the main risks are that the migration may take a long 
>> time, and that the admin may not have properly configured blob-storage 
>> in their buildout.  The migration itself is pretty well-tested, at 
>> least under Plone 3 -- Groundwire has migrated dozens of sites to use 
>> blobs.  There may be some other concern I am forgetting?
> 
> The only other concern I recall is the potential breakage
> of backup routines.
> If someone just rsyncs/copies Data.fs via cron (or the like)
> it will miss the binary data after the upgrade.

As someone who wears two hats (developer and admin) I can see both
sides. However, my admin side is always upset about potentially unknown
upgrade consequences.

As a compromise I would suggest an upgrade experience where the user
gets something pushed into their face about admin changes that may need
to happen before they push the button. As long as people are made *very*
aware of the change *and* they have the opportunity to stop the upgrade
at that moment to prepare their systems it would be OK.

jens

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