RDS for MariaDB Product Series
Table 1 and Table 2 list different DB instance types and their function comparisons of RDS for MariaDB.
DB Instance Type |
Description |
Notes |
Advantages |
Scenarios |
---|---|---|---|---|
Single |
A single-node architecture is more cost-effective than a primary/standby DB pair. |
If a fault occurs on a single instance, the instance cannot recover in a timely manner. |
This instance type supports the creation of read replicas and supports the queries of error logs and slow query logs. Different from primary/standby DB instances that have two database nodes, a single DB instance has only one node, greatly reducing costs. If the node fails, the restoration will take a long time. Therefore, single DB instances are not recommended for sensitive services that have high requirements on database availability. |
|
Primary/Standby |
An HA architecture. A pair of primary and standby DB instances shares the same IP address and can be deployed in different AZs. |
|
The standby node of a primary/standby DB instance is only used for failover and restoration. It does not provide services. The performance of single DB instances is similar to or even higher than primary/standby DB instances because standby nodes cause extra performance overhead. |
|
Function |
Single |
Primary/Standby |
---|---|---|
Number of nodes |
1 |
2 |
Specifications |
vCPUs: a maximum of 64 Memory: a maximum of 512 GB Storage: a maximum of 4,000 GB Final specifications on the console may differ slightly. |
vCPUs: a maximum of 64 Memory: a maximum of 512 GB Storage: a maximum of 4,000 GB Final specifications on the console may differ slightly. |
Monitoring and alarms |
Supported |
Supported |
Security group |
Supported |
Supported |
Backup and restoration |
Supported |
Supported |
Parameter settings |
Supported |
Supported |
SSL |
Supported |
Supported |
Log management |
Supported |
Supported |
Read replicas (which need to be created) |
Supported |
Supported |
SQL audit |
Supported |
Supported |
DBA Assistant |
Supported |
Supported |
Standby DB instance migration |
Not supported |
Supported |
Manual primary/standby switchover |
Not supported |
Supported |
Instance class change |
Supported |
Supported |
Storage scale-up |
Supported |
Supported |
Recycle bin |
Supported |
Supported |
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