Term Kind Topic What it is
Sharding in Practice Horizontal Partitioning pattern Partitioning & Sharding Splitting data across independent stores, how to choose the key, and why resharding is the operation nobody plans for.
Tenant Placement Hybrid Tenancy, Shared-to-Dedicated Migration pattern Partitioning & Sharding Routing each tenant to a shared pool or a dedicated database according to its size and requirements, with an online migration path between them - the hybrid model that neither all-shared nor all-dedicated can match.