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Financial services · Sample

Zero-downtime migration from a legacy database to PostgreSQL

A 1.2 TB legacy database moved to managed PostgreSQL with no downtime and verified data parity.

ClientFinancial services firm
Timeline8 weeks
ServicesData & databases
1.2 TB
migrated
0 min
downtime at cutover
10×
faster reporting queries

The challenge

Licence costs were rising and the ageing database was slowing down reporting. The business could not accept downtime during the move.

What we built

We redesigned the schema, built repeatable migration scripts, ran both databases in parallel with change-data capture, and verified parity table by table before cutting over in a planned window.

The outcome

The switch was invisible to users and reporting queries now run in seconds.