gh-ost: GitHub’s online schema migration tool for MySQL - GitHub Engineering
githubengineering.com/gh-ost-github-s-online-migration-tool-for-mysql
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gh-ost has been developed at GitHub in recent months to answer a problem we faced with ongoing, continuous production changes requiring modifications to MySQL tables. gh-ost changes the existing online table migration paradigm by providing a low impact, controllable, auditable, operations friendly solution.
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