mongorestore

Import a BSON data dump from a directory to a MongoDB database

$ mongorestore --db [database_name] [path/to/directory]

$ mongorestore --host [database_host:port] --db [database_name] --username [username] [path/to/directory] --password

$ mongorestore --db [database_name] [path/to/file]

$ mongorestore --host [database_host:port] --db [database_name] --username [username] [path/to/file] --password

mongorestore [options] [connection-string]

--uri
    The MongoDB connection string. Specifies the host, port, authentication, and other connection options.

--db
    The database to restore to.

--collection
    The collection to restore.

--drop
    Drops each collection from the target database before restoring.

--gzip
    Enables gzip compression for faster data transfer.

--archive=
    Restore data from a specified archive file. It can be used instead of specifying a directory.

--dir
    The directory containing the dumped BSON files.

--oplogReplay
    Replays the oplog entries available in the oplog collection from the dump.

--numInsertionWorkers
    Specifies the number of insertion worker threads to use. Defaults to 1.

--username
    Specify a username with which to authenticate to MongoDB if your database uses authentication.

--password
    Specify a password with which to authenticate to MongoDB if your database uses authentication.

--authenticationDatabase
    The database in which the user's credentials are stored.

--ssl
    Enable SSL connection to MongoDB.

mongorestore is a command-line utility used to restore MongoDB database backups created by mongodump. It reads data from a BSON dump or archive and inserts it into a MongoDB database. This allows for restoring entire databases, specific collections, or only specific parts of collections based on your need.
It can connect to a MongoDB instance using various authentication mechanisms and connection string options. It's designed to be reliable and handle large datasets efficiently, making it a crucial tool for database administrators and developers working with MongoDB.
It provides granular control over the restore process. The utility supports compression for faster data transfer and storage, and it includes options to control indexing behavior, error handling, and parallel processing for optimal performance.

Requires a compatible version of mongod running to connect to. Using `--drop` can cause permanent data loss. Ensure the backup directory or archive is accessible and contains valid MongoDB data.

Using `--numInsertionWorkers` can significantly improve restore performance, especially for large datasets. Experiment with different values to find the optimal setting for your hardware.

Always use secure authentication when restoring to a production environment. Verify that the user specified with `--username` and `--password` has the necessary privileges to perform the restore operation.

mongorestore was developed alongside MongoDB as a core utility for managing database backups. It's evolved over time to support new MongoDB features like authentication mechanisms, compression, and enhanced performance.

mongodump(1), mongo(1), mongostat(1)