Re: Uber migrated from Postgres to MySQL
| От | Jason Dusek |
|---|---|
| Тема | Re: Uber migrated from Postgres to MySQL |
| Дата | |
| Msg-id | CAO3NbwPmz-r1s_7xXH8zXU+hYfkEP7AuOcyESWMTWdX7ezgKmQ@mail.gmail.com обсуждение исходный текст |
| Ответ на | Uber migrated from Postgres to MySQL (Guyren Howe <guyren@gmail.com>) |
| Ответы |
Re: Uber migrated from Postgres to MySQL
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| Список | pgsql-general |
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@gmail.com> 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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