Why does my schema migration run before checking if deployed services survive it?
機会
When you push a schema change to a production database, the migration executes before any tool verifies that the service versions currently running can read and write the new shape. A dropped column or renamed field reaches the database before old pods finish draining, and rollback restores the schema but not data written by the new version in the meantime. ORM tools generate SQL from diffs but model nothing about deployment topology, concurrent service versions, or live read-write patterns. Teams compensate with expand-contract rituals documented in wikis and tribal knowledge, not enforced by tooling. A single misordered step triggered multi-service cascading failures and a documented $4.5 million incident in the last year alone.
重要な理由
A pre-flight compatibility check that models your live service topology would turn the riskiest step in a deployment into something you can reason about before hitting apply.
機会をどう評価するか
Opportunity Scoreは測定値ではなく、私自身の見解です。どれほど痛みを伴うか、どれほど頻繁に影響を与えるか、そして今日時点で解決策がいかに少ないか。スコアが高いほど、構築する価値が高いと私は考えています。
それが現れたときにどれほどの痛みをもたらすか。
実際にどれほど頻繁に人々がそれに直面するか。
今日時点で、それに対する優れたツールがいかに少ないか。