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Zero downtime migrations at Petabyte scale

Link: planetscale.com/blog/zero-down
Discussion: news.ycombinator.com/item?id=4

Zero downtime migrations at petabyte scale — PlanetScale

Data migrations are a critical part of the database lifecycle, and are sometimes necessary for version upgrades, sharding, or moving to a new platform. In many cases, migrations are painful and error-prone. In this article, we walk through how migrations are performed at PlanetScale, and offer advice on how to improve the migration experience.

planetscale.com

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