Book Image

AWS Certified Database – Specialty (DBS-C01) Certification Guide

By : Kate Gawron
5 (1)
Book Image

AWS Certified Database – Specialty (DBS-C01) Certification Guide

5 (1)
By: Kate Gawron

Overview of this book

The AWS Certified Database – Specialty certification is one of the most challenging AWS certifications. It validates your comprehensive understanding of databases, including the concepts of design, migration, deployment, access, maintenance, automation, monitoring, security, and troubleshooting. With this guide, you'll understand how to use various AWS databases, such as Aurora Serverless and Global Database, and even services such as Redshift and Neptune. You’ll start with an introduction to the AWS databases, and then delve into workload-specific database design. As you advance through the chapters, you'll learn about migrating and deploying the databases, along with database security techniques such as encryption, auditing, and access controls. This AWS book will also cover monitoring, troubleshooting, and disaster recovery techniques, before testing all the knowledge you've gained throughout the book with the help of mock tests. By the end of this book, you'll have covered everything you need to pass the DBS-C01 AWS certification exam and have a handy, on-the-job desk reference guide.
Table of Contents (24 chapters)
1
Part 1: Introduction to Databases on AWS
Free Chapter
2
Chapter 1: AWS Certified Database – Specialty Overview
5
Part 2: Workload-Specific Database Design
12
Part 3: Deployment and Migration and Database Security
16
Part 4: Monitoring and Optimization
20
Part 5: Assessment
21
Chapter 16: Exam Practice

Understanding RTO and RPO

There are two critical terms we need to understand when it comes to backup and recovery, RTO and RPO. These two terms are used to help understand the requirements for a business in terms of the speed of recovery required in case of a failure and how much data could be lost in a worst-case scenario. Correct use of these two values will allow you to ensure your backup and recovery strategy meets these requirements.

Let's first look at RTO.

RTO

RTO is the maximum amount of time a system can be unavailable before the impact to the business becomes too severe and a large amount of damage is done. The damage could be financial, legal, or reputational. With RTO, we are focusing on how quickly the database will be returned to a usable state, and depending on the type of failure, we may end up with different RTO values. For example, imagine that you have a Multi-AZ RDS instance. Your primary database suffers a failure due to an underlying network issue...