db.cloneCollection()¶

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Definition¶

db.cloneCollection(from, collection, query)¶

Copies data directly between MongoDB instances. The db.cloneCollection() wraps the cloneCollection database command and accepts the following arguments:

Parameter	Type	Description
`from`	string	Host name of the MongoDB instance that holds the collection to copy.
`collection`	string	The collection in the MongoDB instance that you want to copy. `db.cloneCollection()` will only copy the collection with this name from database of the same name as the current database the remote MongoDB instance. If you want to copy a collection from a different database name you must use the `cloneCollection` directly.
`query`	document	Optional. A standard query document that limits the documents copied as part of the `db.cloneCollection()` operation. All query selectors available to the `find()` are available here.

db.cloneCollection() does not allow you to clone a collection through a mongos. You must connect directly to the mongod instance.

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