You can migrate data from a user-created MongoDB instance to an ApsaraDB for MongoDB instance. Before using ApsaraDB for MongoDB, you need to pay attention to its constraints, as listed in the following table.

Operation Constraints
Restart an instance You must log on to the ApsaraDB for MongoDB console or call the RestartDBInstance operation to restart an instance.
Select the database version Currently, standalone instances support only MongoDB 3.4.
Select the storage engine
  • You can select WiredTiger or RocksDB.
  • Standalone instances do not support TerarkDB.
Select the region Standalone instances are supported in China (Hangzhou), China (Shanghai), China (Qingdao), China (Beijing), and China (Shenzhen).