Why does my schema migration run before checking if deployed services survive it?
机会
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.
为什么重要
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.
我如何评估机会
机会评分是我的个人判断，而非量化指标：痛苦程度、发生频率，以及当前解决方案的匮乏程度。分数越高，意味着我认为越值得去构建。
出现时造成的痛苦程度。
人们实际遇到它的频率。
当前针对它的优质工具有多匮乏。