Incremental backup MongoDB from oplog
Incremental backup procedure


lock writes on a secondary member
Dump oplog from the recorded oplog position on full (or latest incremental ) backup:

mongodump --host &lt;secondary&gt; -d local -c oplog.rs -o /mnt/mongo-test_backup/1 
--query '{ "ts" : { $gt :  Timestamp(1437725201, 50) } }'

Record latest oplog position (same way as for full backups)
Unlock writes


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