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by martin-adams
832 days ago
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Sounds like their discomfort was in the migration path to 'any other database' alongside not having the experience with another database to mitigate any unknown unknowns. > During our evaluation, we explored CockroachDB, TiDB, Spanner, and Vitess. However, switching to any of these alternative databases would have required a complex data migration to ensure consistency and reliability across two different database stores. |
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This is main known known. And this is hard thing to attain.
My favorite story on that is testing of tendermint consensus implementation [1]. The testing process found a way to break the consensus and the reason was that protocol implementation and KV store controlled by protocol used different databases.
[1] https://jepsen.io/analyses/tendermint-0-10-2