The following picture shows the architecture of the Basic Edition and High-availability Edition.
The Basic Edition does not provide a slave node, so it has no performance decrease caused by real-time replication. In this aspect, the Basic Edition is superior to the High-availability Edition of the same specifications.
- Computing is separated from storage, so the failure of the compute node does not cause data loss.
- The large-scale underlying Apsara distributed storage provides multiple replicas to ensure data reliability.
With the number of database nodes reduced, the price is only half that of the High-availability Edition.
The Basic Edition provides basic functions such as IP whitelists, monitoring, alarms, backup, and recovery, but does not provide the following functions:
- Master/slave failover
- Migrate to another zone
- Log management
- Read-only instances
For functions supported by different database engines, see Product series overview.
- Small websites or applications
You can buy cost-effective RDS instances and focus on your business without worrying about database O&M.
- Personal learning
You can use the Basic Edition to test and learn about databases.
- Development and test
RDS instances can be created within minutes. If they are Pay-As-You-Go instances, they can also be released at any time. Therefore, your development effeciency is greatly improved.