On 01/09/16 12:57, Crag Wolfe wrote:
I'm working on a migrate utility for
https://review.openstack.org/#/c/363415 . Quick summary: that means
moving resource.properties_data and event.properties_data to a new
table, resource_properties_data. Migrating to the new model is easy. The
questions come up with the inverse operation.
1) Would we even want to support undoing a migrate? I lean towards "no"
but if the answer is "yes," the next question comes up:
No, OpenStack hasn't supported data migration downgrades for a while
now. Migration failures are ideally fixed by failing forward. As a last
resort rollbacks can be performed by restoring the database from backup.
2)
(redacted)
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