Database Migration

Database migration affects schemas, data, queries, extensions, users, permissions, backup, and performance characteristics. We test compatibility and cutover before production data moves.

When this service is needed

• A database is moving server, version, engine, region, or provider.
• The existing version is approaching end of support.
• Downtime must be minimised through replication or synchronisation.
• Applications use queries or extensions requiring validation.

Scope

• Schema, size, growth, query, extension, and compatibility assessment.
• Target sizing, parameters, storage, HA, backup, and security.
• Schema conversion and remediation when engines differ.
• Initial load, replication, change-data capture, and cutover.
• Consistency checks, query tests, performance baselines, and rollback.
• Connection updates, monitoring, stabilisation, and decommissioning.

Migration stages

1. Discovery: inventory assets, dependencies, owners, and criticality.
2. Design: define the target, migration method, acceptance criteria, and rollback.
3. Rehearsal: test tools, timings, data, and procedures within a controlled scope.
4. Cutover: execute the move through checklists and escalation paths.
5. Validation: prove function, integrity, security, and performance.
6. Stabilisation: monitor outcomes, remediate findings, and retire legacy systems.

Deliverables

• Inventory and dependency map.
• Migration runbook, cutover plan, and rollback plan.
• Test and reconciliation evidence.
• Target-environment documentation and decommission plan.

Intended outcomes

The database moves with verifiable consistency, measured performance, and a prepared rollback path.