Background
During Oracle OpenWorld 2019, there were significant announcements related to my favorite Oracle option in recent years - the Oracle Multitenant option. In this blog post I will summarize the highlights.Oracle 19c Exciting News
Prior to Oracle 19c (Oracle 12c through 18c), in order to use pluggable databases (usually for consolidation purposes), one had to own the multitenant option which is an extra option (=cost) on top of the oracle enterprise edition. There was also a single-tenant option which allows running the multitenant architecture but with only one pluggable database; hence, single-tenant. You can read more about that in a blog post I wrote about Oracle's deployment options (Non-CDB, Single-Tenant, Multitenant).
Starting with Oracle 19c, customers can run 3 pluggable databases with no extra cost, i.e. without the multitenant license.
Oracle 20c - End of Era?
For years the non-cdb architecture has been defined officially by Oracle as deprecated and "may be desupported in the future". In OOW19, it was announced that the next Oracle release (20c) will be the first one that the non-cdb architecture will be officially desupported.
