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Daniel Vrátil authored
Generation is an integer which is guaranteed to never change as long as the database backend is not removed and re-created. If that happens it is guaranteed that the new generation identifier will be higher than the previous one. Client applications can access it via ServerManager::generation(). The purpose of the generation number is to make it possible for applications to detect when the database was recreated and some of their configuration must be invalidated (e.g. collection IDs stored in config files).
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