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 Aurora clusters and replicas

Amazon Aurora has been designed to benefit from cloud technology and as a result, it can use cloud ideologies such as auto-scaling (both horizontal and vertical) and decoupling of different parts of the application to improve resilience in a deeper manner than RDS. Let's take a closer look at an Aurora cluster to see how it decouples the compute layer and the storage layer to offer high redundancy and fast scaling.

Aurora clusters

An Aurora cluster is made up of two different types of nodes:

  • Database instance: This is the power of the database and is where the database application sits and the processing of the data happens.
  • Cluster volume: This is the storage layer spanning three AZs to offer the six data storage locations.

The following diagram shows how an Aurora cluster is arranged:

Figure 5.1 – Amazon Aurora cluster topology

All of the data is stored within the cluster volumes...