ApsaraDB for MongoDB standalone instances provide a high level of data fault tolerance and are suitable for database systems that do not store crucial data. For example, you can use standalone instances in scenarios such as development, testing, learning, and training.
- Standalone instances provide only one primary node for reading and writing data.
- Standalone instances allow you to enjoy the O&M support and kernel optimization of ApsaraDB MongoDB at lower prices. You can select appropriate instance specifications for different business scenarios to reduce costs. For more information about the specifications of standalone instances, see Standalone instance types.
Supported MongoDB versions
Only MongoDB 3.4 and 4.0 are supported. You can create standalone instances of MongoDB versions based on your business requirements. For more information about how to create standalone instances, see Create standalone instances.
For more information about MongoDB versions, see MongoDB versions and descriptions.
- Do standalone instances provide high availability?
No. Standalone instances have only one node and cannot provide high availability. A failure may cause service interruption for more than 30 minutes in extreme cases. We recommend that you use the replica set architecture in production environments.
- Do standalone instances support incremental data migration and synchronization and point-in-time data restoration to a new instance?
No. Standalone instances do not support oplogs. Therefore, standalone instances do not support incremental data migration and synchronization or point-in-time data restoration to a new instance.