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hoangdh/migrate-mongodb.md

Last active January 10, 2026 04:30
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Migrate data MongoDB to other cluster without dumping to local disk
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migrate-mongodb.md

Migrate data MongoDB to a new cluster

  • Source cluster: 10.10.10.10
  • Destination cluster: 10.10.20.10
mongodump --host 10.10.10.10 --port 27017 --archive --numParallelCollections=10 | \
mongorestore --host 10.10.20.10 --port 27017 --archive --numParallelCollections=10 --drop

Note: Use --gzip to save bandwidth.

mongodump --host 10.10.10.10 --port 27017 --archive --gzip --numParallelCollections=10 | \
mongorestore --host 10.10.20.10 --port 27017 --archive --gzip --numParallelCollections=10 --drop
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hoangdh commented Jan 10, 2026

Migrate specify databases to other cluster.

dbs="db01 db02 db03"
CLUSTER_SRC="mongodb://admin:[email protected]:27017,10.10.10.13:27017"

# New cluster
CLUSTER_DEST="mongodb://admin:[email protected]:27017,10.20.1.14:27017"


for db in ${dbs}
do
  echo "Clone ${db}"
  mongodump --uri "${CLUSTER_SRC}" --numParallelCollections=10 --authenticationDatabase=admin --db=${db} --archive | \
  mongorestore --uri "${CLUSTER_DEST}" --numParallelCollections=10 --authenticationDatabase=admin --archive --nsFrom="${db}.*" --nsTo="${db}.*" --drop;
done

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