AWS Database Services Overview
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Questions and Answers

What advantages does a database administrator obtain by using the Amazon Relational Database Service (RDS)?

  • RDS databases automatically scale based on load.
  • RDS enables users to dynamically adjust CPU and RAM resources.
  • RDS simplifies relational database administration tasks. (correct)
  • RDS provides 99.99999999999% reliability and durability.
  • Who is responsible for configuring and performing backups for an Amazon DynamoDB table that requires point-in-time recovery (PITR)?

  • AWS is responsible for configuring and the user is responsible for performing backups.
  • The customer is responsible for configuring and AWS is responsible for performing backups. (correct)
  • The customer is responsible for both tasks.
  • AWS is responsible for both tasks.
  • What is the value proposition of AWS for a company interested in avoiding long-term contracts and moving from fixed costs to variable costs?

  • Volume pricing discounts
  • Automated cost optimization
  • Economies of scale
  • Pay-as-you-go pricing (correct)
  • Study Notes

    Amazon Relational Database Service (RDS)

    • Amazon RDS is a managed relational Database service, which means it simplifies database administration tasks by handling hardware provisioning, database setup, patching, and backups.
    • The statement "RDS databases automatically scale based on load" is incorrect. While storage can autoscale, compute scaling is manual and involves changing instance type.
    • The claim "RDS provides 99.99999999999% reliability and durability" is also incorrect. This level of reliability is not guaranteed by Amazon RDS.
    • RDS does not enable users to dynamically adjust CPU and RAM resources. These adjustments are made by changing the instance type and rebooting the database instance.

    Amazon DynamoDB

    • Amazon DynamoDB offers point-in-time recovery (PITR) for tables, providing continuous backups for the last 35 days.
    • Customers are responsible for configuring PITR, while AWS handles the actual backup process.

    AWS Value Proposition

    • The pay-as-you-go pricing model of AWS allows companies to transition from fixed costs to variable costs, enabling them to pay only for what they use and avoid long-term contracts.

    Total Cost of Ownership (TCO)

    • When evaluating TCO for a workload that requires physical isolation, consider dedicated hosts as a hosting model.

    AWS Dedicated Hosts

    • Dedicated Hosts offer physical isolation for workloads, providing dedicated hardware resources that are not shared with other customers.
    • This hosting model can be crucial when strong isolation requirements or security considerations are paramount.

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    Description

    This quiz covers key concepts and features of Amazon RDS and DynamoDB. It explores database management, scaling limitations, and backup functionalities. Test your knowledge on AWS services and their value propositions.

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