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A Developer is asked to implement a caching layer in front of RDS.

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A Developer is asked to implement a caching layer in front of RDS. Cached content is expensive to regenerate in case of service failure. Which implementation below would work while maintaining maximum uptime?

A.

Implement ApsaraDB for Redis in Cluster Mode

B.

Install Redis on an ECS instance

C.

Implement ApsaraDB for Redis in Standard Mode

D.

Migrate the ROS database to HBase to save the cache layer

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