With regards to write amplification, it makes me think about about OIDs. Used to be, every row had an OID and that OID persisted across row versions.
Would reintroducing such a feature address some of Uber's concerns about multiple indexes? It could, and would do so without the implicit requirement of a foreign key; but it would also require a fast OID to CTID mapping.
On Tue, 26 Jul 2016 at 10:40 Guyren Howe <guyren@xxxxxxxxx> wrote:
Honestly, I've never heard of anyone doing that. But it sounds like they had good reasons.
https://eng.uber.com/mysql-migration/
Thoughts?
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