This whitepaper contains additional guidance not found in the SaaS Lens of the AWS Well-Architected Tool.
Data Partitioning
As you look at different architecture patterns for representing multi-tenant data, you must make choices about how that data is organized. Will the data be stored in separate database, for example, or will it be comingled in a shared construct? These multi-tenant storage mechanisms and patterns are typically referred to as data partitioning.