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Mongodb version 4.4 brings substantial improvements to the replication and initial sync process, including non-penalizing restarts.


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Have backups available just in case something breaks. Start by reading each major version's Release Notes (to be found here for v4.0 and earlier: https://docs.mongodb.com/v4.0/release-notes/). Talk to your developers if they use features that might get removed during the version steps, see "Changes Affecting Compatibility". Upgrading using dump and ...


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