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 high availability and backups

Like other databases, DynamoDB will often become a critical part of your application, and your data needs to be resilient and recoverable to meet your application service level agreements. DynamoDB offers two methods to improve resilience and reliability:

  • Global tables
  • Backups

Let's start by looking at global tables.

Global tables

As DynamoDB is serverless and doesn't run in a VPC, the options you have for making it highly available are different from other AWS services. You cannot have a multi-AZ deployment here. DynamoDB offers a service called global tables to overcome this. Global tables allow you to configure a multi-region and active-active database deployment. DynamoDB will create an exact replica of your database across all the regions you specify, allowing you to create a highly available database system. If a table fails or becomes unavailable in one region, the traffic will automatically be routed...