I provided a “real” answer, but I think it’s important to realize that MySQL is far behind the game in terms of performance… The Oracle acquisition really fucked that software and it hasn’t recovered.
Anyways, horizontal scaling means replicas… But the specifics of that (and resources to aide with it) are highly dependent on their infrastructure… Self hosted? AWS RDS? Aurora? All those have really different starting points when considering a migration.
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I provided a “real” answer, but I think it’s important to realize that MySQL is far behind the game in terms of performance… The Oracle acquisition really fucked that software and it hasn’t recovered.
Anyways, horizontal scaling means replicas… But the specifics of that (and resources to aide with it) are highly dependent on their infrastructure… Self hosted? AWS RDS? Aurora? All those have really different starting points when considering a migration.