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Database migration rehearsal

Replay a migration against production-shaped data and estimate locks, failures, and rollback risk before deployment.

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A POSSIBLE BUILD DIRECTION

From prompt to prototype.

Outcode’s editorial suggestions for this idea. Adapt the scope to your skills, available data and the people you want to help.

A small first version

Run a migration in a disposable database built from synthetic data, recording duration, errors and row counts before and after each step.

How to test it

Include migrations that fail midway, acquire long locks or violate constraints. Verify a tested recovery procedure without connecting the tool to production.

A direction for a larger project

Add concurrent test traffic and multiple dataset sizes. Measure lock wait time and application errors, and distinguish rehearsal estimates from production guarantees.

Building this for a portfolio or course? Show the working flow, your test evidence and the tradeoffs you made. Discuss your approach ↓

BUILD IN PUBLIC

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