There are two different types of database cluster plans. Single node clusters let your database stay on one computer, so if it crashes, you will not have any data.  But you can also have a high availability cluster where the database is shared by many computers so if one crashes, there will still be some data. a). Single node clusters  Begins at $15.00 per month for a single node cluster with 1 GB of RAM. Single node clusters are not highly available, but they feature automatic failover. These clusters are a good fit for preliminary development and testing. b). High availability clusters  High availability clusters have a price starting at $15.00 per month for a 2 GB RAM/1 vCPU primary node with at least one $10.00 per month matching standby node for automatic failover. At the same time, you can add or remove standby nodes any time you want.  Other features, like point-in-time recovery and read-only nodes, vary by database engine.  c). Read-only nodes  Its price starts at $5.00 per month. Read-only nodes are actually replicas of a cluster’s primary node located in additional geographical regions.