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# MongoDB Backup (mongodump) and Restore (mongorestore) * * * ## MongoDB Data Backup In MongoDB, we use the `mongodump` command to back up MongoDB data. This command can export all data to a specified directory. The `mongodump` command can specify the data volume and the server to be transferred via parameters. ### Syntax The script syntax for the `mongodump` command is as follows: >mongodump -h dbhost -d dbname -o dbdirectory * **-h:** The address of the MongoDB server, for example: 127.0.0.1. You can also specify the port number: 127.0.0.1:27017 * **-d:** The database instance to be backed up, for example: test * **-o:** The location where the backed-up data will be stored, for example: c:datadump. This directory needs to be created in advance. After the backup is complete, the system automatically creates a `test` directory under the `dump` directory, which stores the backup data for that database instance. ### Example Start your `mongod` service locally on port 27017. Open a command prompt window, navigate to the `bin` directory of the MongoDB installation directory, and enter the `mongodump` command: >mongodump After executing the above command, the client will connect to the MongoDB service at IP 127.0.0.1 and port 27017, and back up all data to the `bin/dump/` directory. The command output is as follows:  The optional parameter list for the `mongodump` command is shown below: | Syntax | Description | Example | | --- | --- | --- | | mongodump --host HOST_NAME --port PORT_NUMBER | This command will back up all MongoDB data | mongodump --host example.com --port 27017 | | mongodump --dbpath DB_PATH --out BACKUP_DIRECTORY | | mongodump --dbpath /data/db/ --out /data/backup/ | | mongodump --collection COLLECTION --db DB_NAME | This command will back up a specific collection in a database. | mongodump --collection mycol --db test | * * * ## MongoDB Data Restore MongoDB uses the `mongorestore` command to restore backed-up data. ### Syntax The script syntax for the `mongorestore` command is as follows: >mongorestore -h -d dbname * **--host , -h :** The address of the MongoDB server, default is: localhost:27017 * **--db , -d :** The database instance to be restored, for example: test. This name can also be different from the backup name, such as test2 * **--drop:** When restoring, first delete the current data, then restore the backed-up data. This means that after restoration, any data added or modified after the backup will be deleted. Use with caution! * **:** The last parameter of `mongorestore`, which sets the location of the backup data, for example: c:datadumptest. You cannot specify both `` and the `--dir` option at the same time. `--dir` can also be used to set the backup directory. * **--dir:** Specifies the backup directory. You cannot specify both `` and the `--dir` option at the same time. Next, we execute the following command: >mongorestore The output after executing the above command is as follows:  [](#)(#) (#)[](#) [Volcengine Coding Plan supports mainstream large models like Doubao, GLM, DeepSeek, Kimi, MiniMax, officially supplied, stable and reliable. Configuration Guide ¥9.9/month Subscribe Now](https://maas.xfyun.cn/modelSquare?ch=maas_lm_l2E) ### Click me to share notes