2014-03-10 4:47 GMT+08:00 Jay Pipes <jaypi...@gmail.com>: > > > > 3. This would make the instances and shadow_instances tables have > > different schemas, i.e. instances.uuid would be nullable=False in > > instances but nullable=True in shadow_instances. Maybe this doesn't > matter. > > No, I don't think this matters much, to be honest. I'm not entirely sure > what the long-term purpose of the shadow tables are in Nova -- perhaps > someone could clue me in to whether the plan is to keep them around? > > As I know the tables shadow_* are used by command ' nova-manage db archive_deleted_rows' , which moves records with "deleted=True" to table shadow_* . That means these tables are used by other process, So, I think we need other tables to store the old records in your migration .
-- ChangBo Guo(gcb)
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