What is Relational Database Service (RDS)

Amazon Relational Database Service (Amazon RDS) makes it easy to set up, operate, and scale a relational database in the cloud.
It provides cost-efficient and resizable capacity while automating time-consuming administration tasks such as hardware provisioning, database setup, patching and backups.
It frees you to focus on your applications so you can give them the fast performance, high availability, security, and compatibility they need.

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What is Amazon RDS Read Replicas?

The read replica operates as a DB instance that allows only read-only connections. Applications connect to a read replica the same way they do to any DB instance. Amazon RDS replicates all databases in the source DB instance. The Oracle DB engine supports replica databases in mounted mode.

What is Amazon RDS Multi AZ?

RDS Multi-AZ. Amazon RDS Multi-AZ deployments provide enhanced availability for database instances within a single AWS Region. With Multi-AZ, your data is synchronously replicated to a standby instance in a different AZ.

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