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Two hundred services share a database platform and every migration is a nervous Thursday. Design the tooling.

Most migrations are safe and a handful can take the site down by holding a lock for eight seconds. Build the tooling to tell those apart automatically, because a review culture cannot do it two hundred times a month.

Updated Sep 2026 · Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.

Most migrations are safe and a handful can take the site down by holding a lock for eight seconds. Build the tooling to tell those apart automatically, because a review culture cannot do it two hundred times a month.

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