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gh-ost

GitHub's online schema migration for MySQL

gh-ost allows for online schema migrations in MySQL which are:

  • Triggerless
  • Testable
  • Pausable
  • Operations-friendly

How?

WORK IN PROGRESS

Please meanwhile refer to the docs for more information.

What's in a name?

Originally this was named gh-osc: GitHub Online Schema Change, in the likes of Facebook online schema change and pt-online-schema-change.

But then a rare genetic mutation happened, and the s transformed into t. And that sent us down the path of trying to figure out a new acronym. Right now, gh-ost (pronounce: Ghost), stands for:

  • GitHub Online Schema Translator/Transformer/Transfigurator

Authors

gh-ost was designed, authored, reviewed and tested by the database infrastructure team at GitHub: