SaaS / Analytics

MySQL → PostgreSQL migration with zero data loss

A sample engagement template covering a typical 250GB MySQL → PostgreSQL migration with staging dry-run, type-map review, and a clean cutover.

This is a representative engagement template demonstrating our standard MySQL → PostgreSQL workflow. Replace this content with the real client engagement once you have one to publish.

The project starts with a schema dump and a slow-log capture. We produce a type-mapping document for the columns where MySQL and PostgreSQL diverge (TINYINT, ENUM, DATETIME precision, JSON), get sign-off, then load into a staging PostgreSQL via pgloader. Row counts and per-table checksums are verified before any cutover is scheduled.

Before and after performance comparison

Outcomes

  • Type-map document signed off before cutover
  • Row-count + checksum validation green on staging
  • Rollback plan written and rehearsed