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:
>---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.
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 Mongorerstore command to restore the backed up data.
Grammar
The mongorestore command script syntax is as follows:
>----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!
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Novice MongoDB Learning---(vii) MongoDB Backup (mongodump) and recovery (Mongorerstore)