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clone¶
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clone
¶ The
clone
command clones a database from a remote MongoDB instance to the current host.clone
copies the database on the remote instance with the same name as the current database. The command takes the following form:clone
has the following fields:Field Type Description hostname:port
string The hostname and port of the remote MongoDB instance. bypassDocumentValidation
boolean Optional. Enables
clone
to bypass document validation during the operation. This lets you insert documents that do not meet the validation requirements.New in version 3.2.
Behavior¶
clone
can copy from a non-primary member of a replica set.clone
does not snapshot the database. If any clients update the database you’re copying at any point during the clone operation, the resulting database may be inconsistent.- You must run
clone
on the destination server. - The destination database will be locked periodically during the
clone
operation. In other words,clone
will occasionally yield to allow other operations on the database to complete.
See copydb
for similar functionality with greater flexibility.