How different is an Amazon EC2 RDS DB Instance different from the normal EC2 Instance?

RDS is a unmanaged MySQL service, means you only start and load data into it and your ready to go.

An RDS db instance can be configured to not lose any data during downtime, either planned or unplanned. For unplanned downtime, AWS keeps transaction logs which are replayed automatically on a failover instance. These logs can also be used to get an instance to a specific point in time.

For planned downtime, you create a DB snapshot prior to stopping the instance, and can later start a new instance with the saved snapshot.

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