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.
|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||
|Select the region||Standalone instances are supported in China (Hangzhou), China (Shanghai), China (Qingdao), China (Beijing), and China (Shenzhen).|