MongoDB Backup (Mongodump) and recovery (Mongorestore)

MongoDB Data Backup

In MongoDB we use the Monogodump command to back up MongoDB data. The command can export all data to the specified directory. The Monogodump command allows you to specify the server to which the exported data can be dumped by parameter.

Grammar

>mongodump-h dbhost-d Dbname-o dbdirectory

-H:MONGDB The server address, for example: 127.0.0.0, you can also specify the port number: 127.0.0.1:27017

-d: Example of a database that needs to be backed up, for example: test

-o: The data storage location of the backup. For example: C:\data\dump, of course, the directory needs to be established in advance, after the backup is completed, the system automatically set up a test directory under the Dump directory, which contains the database instance backup data.

Example

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 runoob.com--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

>mongorestore-h 
 
--host <:p Ort>,-h <:p Ort>:

MongoDB server address, default is: localhost:27017

--db,-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

--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.

<path>:

Mongorestore the last parameter, set the location of the backup data, for example: C:\data\dump\test.

You cannot specify both the <path> and--dir options,--dir can also set up a backup directory.

--dir:

Specify the directory to be backed up

You cannot specify both the <path> and--dir options.

Next we execute the following command:


>mongorestore
 
Execute the above command output as follows: