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How can I backup and restore a large mongodb database (500GB) from a server running an older version (v2.6) than the target one (v3.6)?. The downtime is critical.

We've tried by making a straight copy of the data files as well as filesystem snapshot, but these two methods result in incompatibility issues.

Miguel Santos
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  • "Large" and "too long" are too general terms that practically say nothing. You need to be more specific. – Overmind Jun 25 '20 at 08:49
  • Did you try filesystem snapshots? https://docs.mongodb.com/manual/tutorial/backup-with-filesystem-snapshots/ – maar Jun 25 '20 at 10:27
  • Also this might be useful in creating incremental backups. https://github.com/Dabz/mongo-backup – maar Jun 25 '20 at 10:28

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