Explanation:
RDS Proxy reduces failover time by pooling connections and managing failover transparently, hiding the DNS change and reducing downtime from minutes to seconds. MariaDB doesn't have multi-writer like Aurora. Cache helps read but not for maintenance failover.
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An RDS for MariaDB Multi-AZ database causes several minutes of downtime during planned maintenance failovers. How can the SysOps administrator reduce downtime?
A
Create an RDS for MariaDB DB cluster with multiple writer instances; configure the app to retry on another primary node.
B
Configure RDS maintenance window settings to pool connections during failover.
C
Configure ElastiCache write-through cache; connect the app to the cache.
D
Create an RDS Proxy associated with the database; configure the app to connect to the proxy.