How to use mongodump for 1 collection

问题

How can I use mongodump to move a single collection from one database to another?

How should I use the command and its options?

回答1:

I think it's just:

mongodump --db=<old_db_name> --collection=<collection_name> --out=data/

mongorestore --db=<new_db_name> --collection=<collection_name> data/<db_name>/<collection_name>.bson

Also see docs here and here.

Btw, the other way to move the collection from one database to another is to use renameCollection:

db.runCommand({renameCollection:"<old_db_name>.<collection_name>",to:"<new_db_name>.<collection_name>"})

Here's some related SO threads:

• How to copy a collection from one database to another in MongoDB
• How to use the dumped data by mongodump?

Hope that helps.

回答2:

Taking database (document) dump (backup)

mongodump --host <hostname-of-mongoserver> --db <db-name> --username <dbuser-name> --password <password> --gzip --out </backup/location/>

Taking collection dump (backup)

mongodump --host <hostname-of-mongoserver> --db <db-name> --collection <collection-name> --username <dbuser-name> --password <password> --gzip --out </backup/location/>

mongodump documentation

回答3:

Very basic commands for dump mongodb.

1. Dump all collection

   mongodump
   

2. Dump specific database only

   mongodump --db=DB_NAME
   

3. Dump database with username & password

   mongodump -u=USERNAME -p=PASSWORD --db=DB_NAME
   

4. Dump from another host

   mongodump --host HOST_NAME/HOST_IP --port HOST_PORT  --out {YOUR_DIRECTOTY_PATH} --db=DB_NAME
   

Only able to dump from another host when they allow it.

来源：https://stackoverflow.com/questions/16347134/how-to-use-mongodump-for-1-collection