The Basic Edition is based on the single-node architecture and separates computing from storage, providing a cost-effective database service.
The following picture shows the architecture of the Basic Edition and High-availability Edition.
Advantages
Performance
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 or Enterprise Edition of the same specifications.
Reliability
- Computing is separated from storage, so the failure of the compute node does not cause
data loss.
Note When the log backup interval is set to 30 minutes for an SQL Server Basic Edition instance, the instance can be restored to the nearest time point with 30 minutes in the event of underlying SSD damage or force majeure. For more information, see Back up the data of an RDS instance.
- The large-scale underlying Apsara distributed storage provides multiple replicas to ensure data reliability.
Costs
With the number of database nodes reduced, the price is only half that of the High-availability Edition.
Functions
The Basic Edition provides basic functions such as IP whitelists, monitoring, alarms, backup, and recovery, but does not provide the following functions:
- Switch between master and slave instances
- Migrate instance across zones
- Log management
- Introduction to MySQL read-only instances
For functions supported by different database engines, see ApsaraDB for RDS edition overview.
Scenarios
- 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.