Answer: A relational database is a database that organizes data into one or more tables, each containing rows and columns. These tables are linked using relationships based on joins, allowing users to query and manage data in a structured and efficient manner.
Q2: How is Amazon RDS different from running a database on an EC2 instance?
Answer: Running a database on an EC2 instance requires infrastructure management and software configuration, while Amazon RDS simplifies the process by providing database management services.
With RDS, AWS manages key operations, including hardware configuration, software installation, patching, and backups, allowing users to focus on managing their data and applications. Additionally, RDS provides features such as automatic backups, point-in-time restores, and scaling capabilities that are not available when running data on an EC2 instance.
Q3: What are the different database engines supported by Amazon RDS?
Answer: Supports many database engines, including Amazon RDS, MySQL, PostgreSQL, Oracle, SQL Server, MariaDB and Amazon Aurora. Each engine has its own unique features and advantages, allowing users to choose the engine that best suits their needs.
Q4: What is Multi-AZ deployment on Amazon RDS?
Answer: Multi-AZ (Availability Zone) deployment in Amazon RDS is a feature that provides high availability and longevity for database instances. With Multi-AZ, AWS automatically creates a second DB instance in a different Availability Zone from the primary instance. Data is automatically replicated between the two instances, and in case of a failure or outage, the second instance can be upgraded to the first with minimal downtime.
Q5: What are Amazon RDS Read Replicas?
Answer: Amazon RDS Read Replicas is a feature that allows users to create one or more read copies of database instances. Read copies can be used to remove traffic from the first instance, improve performance and increase capacity. They can also be used to create a text-only version of data for reporting or analysis. AWS manages data replication from master instance to read replica and users can easily support read copy as a new master instance in case it fails or fails.