LEGACY MODERNIZATION20,000+ users
Zero-Downtime Data Migration
The challenge
An enterprise user platform needed to migrate 20,000+ records without interrupting production access or compromising identity data. The work required repeatability, validation, rollback planning, and close coordination with existing systems.
Architecture approach
- Built an incremental Drupal migration pipeline with deterministic mappings.
- Added integrity checks, reconciliation reports, and restartable batches.
- Planned release sequencing around zero-downtime production constraints.
- Preserved source-to-target traceability for auditing and troubleshooting.
- Combined progressive rollout with rapid rollback procedures.
Outcome
The migration completed while preserving data integrity and platform availability. The repeatable pipeline reduced operational risk and gave the delivery team clear checkpoints throughout the transition.
Core stack
PHP · Drupal · MySQL · Microsoft SQL Server · AWS · Migration APIs · CI/CD
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