This lesson develops CDB/PDB Architecture, Services, and Storage within Oracle Database 19c: Multitenant Architecture.
The work is anchored to a database team consolidating application databases into a governed Oracle 19c multitenant estate, so each decision is connected to a measurable operational result and an accountable owner.
The instructor diagnoses multitenant components, root, seed, application containers, PDBs, and containers, then connects it to common/local users, services, sessions, containers, and administration context. The demonstration captures the exact configuration, transaction, command, query, log, or screen evidence needed to prove intended behavior and the applicable control boundary.
Learners execute a guided lab focused on common/local users, services, sessions, containers, and administration context and tablespaces, files, undo modes, temp usage, and storage isolation. The exercise introduces a realistic exception related to data dictionary views, open modes, saved state, startup, and architecture validation and requires a reversible correction supported by before-and-after evidence.
Acceptance requires accurate handling of tablespaces, files, undo modes, temp usage, and storage isolation, traceable proof for multitenant components, root, seed, application containers, PDBs, and containers, and a repeatable recovery path for data dictionary views, open modes, saved state, startup, and architecture validation. Results must be understandable to both implementers and operational support teams.
Learners compare symptoms, logs, state, dependencies, and recent changes when data dictionary views, open modes, saved state, startup, and architecture validation occurs. The final diagnosis must separate the immediate fix from the preventive control.
The completed output is a tested cdb/pdb architecture, services, and storage implementation or analysis, with validation evidence, troubleshooting notes, rollback guidance, and a concise operational handover.