You can easily migrate self-built MongoDB databases to ApsaraDB for MongoDB instances. However, ApsaraDB for MongoDB has some constraints to be aware of.
|Database root permission||Root permissions are unavailable to users.|
|Modify database parameters||Currently, parameter modification functions are not supported.|
|Create database copy||The system automatically creates a three-node ReplicaSet. Of the three nodes, the primary and secondary nodes are provided to the users. The standby node is invisible to the users. Currently, users cannot manually create a secondary node.|
|Restart database||The instance must be restarted on the console.|
|Data migration||The command line or graphical interface can be used to perform logical import. Currently, no official data import tool is provided.|
|Storage engine||MongoDB 3.2 is currently supported. Only the WiredTiger storage engine is supported and the storage engine cannot be modified.|
|Build a cluster||You can create a cluster version instance on the sales page. Select the configuration and quantity of Mongos and shard nodes (each node contains the three-node ReplicaSet), and specify a ConfigServer. Clusters are maintained by Alibaba Cloud’s MongoDB O&M team.|