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by KajMagnus
2253 days ago
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Interesting that you mention doing this (version numbers) with views too, I didn't think about that ... ... Maybe that could be a way to "perview" a database migration, before running the migration for real. There could be a table 'Some_table_view_v2' that shows how that table would look, after an upcoming data migration. And then v2 app server code, would use that new view. — Then one could be more certain that the data migration, will work fine. (At the same time, one might need to be careful to let just a small a fraction of the requests, use the new View, if the view is a bit / a-lot slower than the real table.) |
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