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Comment Re:Optimistic concurrency (Score 4, Informative) 283 283

Absolutely correct, but that just means that there has to be server-side locks for the commitment phase (4-6), it doesn't impact the client-side. This has an implication for performance of the commitment phase, but luckily, database vendors have been struggling with efficient implementation of commit for years, so using the transaction features of whatever database is used for storage should resolve most of those problems (i.e. check and update the version number in the database in a single transaction).

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