Oracle Database 21c: New Features for Administrators — Lesson 1: 21c Architecture, Multitenant Enhancements, PDB Operations, and Lifecycle

Learning Objectives

• Explain the purpose and operating context of 21c innovation-release context, compatibility, support, and adoption planning.
• Apply CDB and PDB enhancements, application containers, and isolation and PDB creation, relocation, refresh, snapshot, and service operations in a controlled environment.
• Validate outcomes and troubleshoot risks involving upgrade prerequisites, fallback planning, feature inventory, and evidence.

Detailed Topics

• 21c innovation-release context, compatibility, support, and adoption planning
• CDB and PDB enhancements, application containers, and isolation
• PDB creation, relocation, refresh, snapshot, and service operations
• upgrade prerequisites, fallback planning, feature inventory, and evidence

Instructor Demonstration

Demonstrate 21c innovation-release context, compatibility, support, and adoption planning for a 19c estate assessed and tested for selective adoption of Oracle Database 21c capabilities; capture the exact configuration, code, command, transaction, query, dashboard, model, schedule, or report evidence that proves the expected result.

Hands-On Exercise

Complete a controlled Oracle Database 21c: New Features for Administrators exercise covering CDB and PDB enhancements, application containers, and isolation and PDB creation, relocation, refresh, snapshot, and service operations; introduce an exception involving upgrade prerequisites, fallback planning, feature inventory, and evidence, diagnose it from evidence, apply the smallest reversible correction, and rerun acceptance checks.

1. Confirm scope, prerequisites, identities, dependencies, data, risks, and expected outcome.
2. Perform the course-specific configuration, development, administration, analysis, or business-process workflow.
3. Capture commands, settings, records, logs, screenshots, reports, metrics, or test results.
4. Compare the observed result with acceptance criteria and document corrective or preventive action.

Scenario Analysis

• Identify the technical or business decision and the stakeholders affected by it.
• Compare security, performance, reliability, compliance, cost, usability, and support trade-offs.
• Define rollback, recovery, communication, evidence, ownership, and escalation requirements.

Troubleshooting Guidance

Diagnose issues involving 21c innovation-release context, compatibility, support, and adoption planning, CDB and PDB enhancements, application containers, and isolation, PDB creation, relocation, refresh, snapshot, and service operations, upgrade prerequisites, fallback planning, feature inventory, and evidence without making an unverified production change. Separate symptoms from causes, gather time-correlated evidence, test a reversible hypothesis, validate the correction, and record recurrence controls.

Validation Checklist

• The requirement, environment, inputs, dependencies, and expected result are documented.
• The result is reproducible and supported by product-specific evidence.
• Normal, boundary, failure, security, performance, and operational conditions are reviewed.
• Exceptions, rollback, ownership, support actions, and the next improvement priority are recorded.

Lesson Outcome

Learners can apply 21c Architecture, Multitenant Enhancements, PDB Operations, and Lifecycle in a realistic Oracle Database 21c: New Features for Administrators scenario and defend the result with documented evidence.