MongoDB Backup (Mongodump) and recovery (Mongorestore)

MongoDB Data Backup

In MongoDB we use the Mongodump command to back up MongoDB data. The command can export all data to the specified directory.

The Mongodump command allows you to specify the server to which the exported data can be dumped by parameter.

Grammar

The mongodump command script syntax is as follows:

>mongodump-h dbhost-d Dbname-o dbdirectory

• -H:

  MONGDB the server address, for example: 127.0.0.1, you can also specify the port number: 127.0.0.1:27017

• -D:

  The database instance that needs to be backed up, for example: test

• -O:

  Backup data storage location, for example: C:\data\dump, of course, the directory needs to be established in advance, after the backup is completed, the system automatically establishes a test directory under the Dump directory, which holds the backup data of the database instance.

Instance

Use 27017 locally to start your mongod service. Open a Command Prompt window and go to the bin directory of the MongoDB installation directory to enter the command mongodump:

>mongodump

After executing the above command, the client connects to the MongoDB service with IP 127.0.0.1 port number 27017 and backs up all data to the bin/dump/directory. The command output results are as follows:

The list of optional parameters for the Mongodump command is as follows:

Grammar	Description	Example
Mongodump--host host_name--port port_number	This command will back up all MONGODB data	Mongodump--host w3cschool.cc--port 27017
Mongodump--dbpath Db_path--out backup_directory		Mongodump--dbpath/data/db/--out/data/backup/
Mongodump--collection Collection--db db_name	The command backs up a collection of the specified databases.	Mongodump--collection mycol--db test

MongoDB Data Recovery

MongoDB uses the Mongorestore command to restore the backed up data.

Grammar

The mongorestore command script syntax is as follows:

>mongorestore-h dbhost-d dbname--directoryperdb dbdirectory

• -H:

  MongoDB server Address

• -D:

  A database instance that needs to be recovered, for example: test, and of course the name can be different from the backup time, such as Test2

• --directoryperdb:

  Where to back up your data, for example: C:\data\dump\test, why add a test here instead of a dump at backup time, and read the tips yourself!

• --drop:

  When recovering, delete the current data and then restore the backed up data. That is, after the recovery, add the modified data after the backup will be deleted, use with caution Oh!

Next we execute the following command:

>mongorestore

Execute the above command output as follows:

MongoDB Backup (Mongodump) and recovery (Mongorestore)