Overview

Notes

To ensure better performance and stability of the instance, the system will upgrade the minor version to the latest version by default. If the minor version of your instance expires or is not included in the maintenance list and the instance is upgraded, migrated, changed, Created from a backup, Created by point-in-time, or performed Restore one or more databases of an ApsaraDB for MongoDB instance.

Limits

Standalone instances do not support incremental data migration or synchronization.

Data migration solutions

• You can use the following methods to migrate the data of a MongoDB database:
  Notice Standalone instances do not support incremental data migration.
  • Use Data Transmission Service (DTS) to fully or incrementally migrate the data of a MongoDB database. This enables you to smoothly migrate data from a MongoDB database to the cloud without affecting business. For more information about DTS, see What is DTS?
  • Use the official MongoDB tools such as mongodump and mongorestore to fully migrate the data of a MongoDB database.
  • Use a physical or logical backup file to migrate the data of an ApsaraDB for MongoDB instance to an on-premises database.
• The following table describes data migration methods in different scenarios.

  Migration scenario	Source instance architecture	References
  Migrate data from a self-managed database to an ApsaraDB for MongoDB instance	Standalone or replica set instance	Migrate an ECS-hosted self-managed MongoDB database that uses the standalone or replica set architecture to ApsaraDB for MongoDB
  	Sharded cluster instance	Migrate the shards of a self-managed MongoDB database that hosts on ECS to ApsaraDB for MongoDB
  	Standalone instance	Migrate a self-managed standalone MongoDB database to Alibaba Cloud by using DTS Migrate self-managed MongoDB databases to standalone instances by using tools provided by MongoDB
  	Replica set instance	Migrate the replica set of a self-managed MongoDB database to Alibaba Cloud by using DTS Migrate self-managed databases to Alibaba Cloud by using tools provided by MongoDB
  	Sharded cluster instance	Migrate the shards of a self-managed MongoDB database to Alibaba Cloud by using DTS Migrate a self-managed MongoDB database to ApsaraDB for MongoDB by using tools provided by MongoDB
  Migrate data from a third-party cloud database to an ApsaraDB for MongoDB instance	N/A	Migrate data from Amazon DynamoDB to ApsaraDB for MongoDB by using mongoimport
  	Replica set or sharded cluster instance	Migrate data from MongoDB Atlas to ApsaraDB for MongoDB by using mongodump and mongorestore Migrate data from a MongoDB Atlas database to Alibaba Cloud Migrate an Amazon DynamoDB database to ApsaraDB for MongoDB by using NimoShake
  Migrate data between ApsaraDB for MongoDB instances	Replica set instance	Migrate data from a replica set instance to a sharded cluster instance
  	Standalone instance	Migrate data from a standalone instance to a replica set or sharded cluster instance
  	Standalone or replica set instance	Migrate data between ApsaraDB for MongoDB instances of different Alibaba Cloud accounts
  	Standalone, replica set, or sharded cluster instance	Migrate data between ApsaraDB for MongoDB instances across regions
  Migrate data from an ApsaraDB for MongoDB instance to a self-managed MongoDB database	Replica set instance	Restore data of an ApsaraDB for MongoDB instance to a self-managed MongoDB database by using logical backup Restore data of an ApsaraDB for MongoDB instance to a self-managed MongoDB database by using physical backup

Data synchronization solutions

• You can use the following methods to synchronize the data of a MongoDB database:
  Notice Standalone instances do not support data synchronization.
  • Use DTS to synchronize data between MongoDB databases.
  • Use the MongoShake tool developed by Alibaba Cloud to synchronize data between MongoDB databases.
• The following table describes data synchronization methods in different scenarios.

  Synchronization scenario	Tool	References
  Synchronize data between instances	DTS	Synchronize data from an ApsaraDB for MongoDB instance (replica set architecture) to another ApsaraDB for MongoDB instance (replica set architecture or sharded cluster architecture) Configure two-way data synchronization between ApsaraDB for MongoDB instances (sharded cluster architecture)
  Synchronize data to an existing instance	MongoShake	Use MongoShake to implement one-way synchronization between ApsaraDB for MongoDB replica set instances