# Zero-downtime database migration for Fielddesk

> Moved a 2 TB production database to a managed service without downtime.

URL: https://freelance.adscaled.media/freelancers/oleksandr-bondarenko/work/zero-downtime-database-migration-for-fielddesk

Moved a 2 TB production database to a managed service without downtime. A case study by Oleksandr Bondarenko, DevOps & Cloud Engineer (AWS, Kubernetes).

## Challenge

Fielddesk, a field service software company, ran a self-managed PostgreSQL server that was running out of disk and had no failover. Any maintenance window meant lost sales.

## Solution

I set up logical replication to Amazon RDS, validated data continuously, switched application traffic with a short read-only phase measured in seconds, and kept the old server as a fallback for a week.

[View Oleksandr Bondarenko’s profile](https://freelance.adscaled.media/freelancers/oleksandr-bondarenko)

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