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Versionstamps are not a simple timestamp; it’s a cluster-wide order-able unique id.

https://apple.github.io/foundationdb/data-modeling.html#vers...

How do they differ from vector clocks? Just a different implementation of the same thing maybe? Either way, distributed filesystems definitely have the same general concept.

Vector clocks give a partial ordering. FDB version stamps give a total ordering by having a single process issue them for the entire cluster. There's a good breakdown here: https://blog.the-pans.com/notes-on-the-foundationdb-paper/

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