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

Maintaining and monitoring a DynamoDB table

The main tools you will use for monitoring a DynamoDB table are CloudWatch and CloudTrail. CloudWatch monitors the performance metrics of the table, such as the number of reads and writes and throughput metrics, while CloudTrail watches and records the actual data access patterns, stores, and audit trail of changes made.

One of the main areas you will need to closely monitor with DynamoDB is the amount of data being read and written to the table. We will look at the pricing in the next section, but DynamoDB is billed based on reads and will start getting errors stating 'ProvisionedThroughputExceededException'. For the full list of common DynamoDB errors, please see https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/CommonErrors.html#CommonErrors-ThrottlingException.

The following figure shows an example of the metrics you can monitor in CloudWatch. This diagram shows that we are using more write capacity than...