You can go ahead and check the contents of the local database to see how the data in MongoDB is saved in JSON format. You can read more about the database here: Īs you can see, all the databases are empty except for the local database. However, you will probably not need to modify its contents. The database contains insightful information which could be used for debugging purposes. Local: The local database is used to store instance specific information, such as startup logs, results of command-line operations, etc.If you are curious about the config database, then you can read more about it in this link: It is discouraged to make changes in this database. Config: The config database is used by the MongoDB engine for the management of the DB instance.There are countless way to configure authorization, depending on your application’s architecture and needs. Please note that access management information is not confined to the admin database only. Admin: The admin database is used to store authentication and authorization data for the instance such as user credentials, roles, etc.The databases admin, config and local are installed by default on your MongoDB instance and each of them fulfill a specific purpose.
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