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Does Google Cloud Spanner use the Spanner database per the 2013 paper? Or does Google simply use the brand and implement a cheaper and more performant db under the hood? I suspect it is the latter because most companies do not need global consistency anyway, so it may make sense to relax parts of what Spanner was originally built for.

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Yes, it's the same Spanner that's used internally. But obviously it's progressed hugely since 2013.

More specifically, infra and cloud Spanner are the same stack. So they've progressed together hugely since 2013. :) The real differences between the two are more about the internal tooling we (Google) have around infra that's built up with our other services that consume it over the years that aren't relevant to anyone other than Google.

Amazing. And thanks for clarification

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