db.copyDatabase()¶

Definition定义¶

db.copyDatabase(fromdb, todb, fromhost, username, password, mechanism)¶

Deprecated since version 4.0.

Important

Starting in version 4.2, MongoDB removes the copydb command. The deprecated db.copyDatabase(), which wraps the copydb command, can only be run against MongoDB 4.0 or earlier versions. For behavior and examples, refer to the 4.0 or earlier version of the manual.

For an alternative in version 4.2+, see Copy/Clone a Database.

Copies a database either from one mongod instance to the current mongod instance or within the current mongod.

The mongo shell method db.copyDatabase() takes the following arguments:

Parameter参数	Type类型	Description描述
fromdb	string	Name of the source database.
todb	string	Name of the target database.
fromhost	string	Optional.可选。The hostname of the source mongod instance. Omit to copy databases within the same mongod instance.
username	string	Optional.可选。The name of the user on the fromhost MongoDB instance. The user authenticates to the fromdb. For more information, refer to the 4.0 or earlier version of the manual.
password	string	Optional.可选。The password on the fromhost for authentication. The method does not transmit the password in plaintext. For more information, refer to the 4.0 or earlier version of the manual.
mechanism	string	Optional.可选。The authentication mechanism on the fromhost. The fromhost credentials must use SCRAM-SHA-1. Changed in version 4.0.在版本4.0中更改。copyDatabase() no longer supports MONGODB-CR to authenticate to the fromhost.