Book Image

AWS Certified SysOps Administrator ??? Associate Guide

By : Marko Sluga
Book Image

AWS Certified SysOps Administrator ??? Associate Guide

By: Marko Sluga

Overview of this book

AWS certifications are becoming one of the must have certifications for any IT professional working on an AWS Cloud platform. This book will act as your one stop preparation guide to validate your technical expertise in deployment, management, and operations on the AWS platform. Along with exam specific content this book will also deep dive into real world scenarios and hands-on instructions. This book will revolve around concepts like teaching you to deploy, manage, and operate scalable, highly available, and fault tolerant systems on AWS. You will also learn to migrate an existing on-premises application to AWS. You get hands-on experience in selecting the appropriate AWS service based on compute, data, or security requirements. This book will also get you well versed with estimating AWS usage costs and identifying operational cost control mechanisms. By the end of this book, you will be all prepared to implement and manage resources efficiently on the AWS cloud along with confidently passing the AWS Certified SysOps Administrator – Associate exam.
Table of Contents (26 chapters)

Changing RDS instance types

The simplest way to get more performance from our database is to increase the instance size of our RDS instance; this can be done with very little effort in RDS as we are able to initiate an instance resize from the management console, CLI, or SDK. Once initiated, the instance is shut down and the instance type is changed; this is essentially done in the same way as with EC2 instances. For a single instance RDS, this means that the service will see a disruption as the instance needs to be shut down. In a Multi-AZ deployment, the secondary instance will be resized first, then the traffic will be redirected to the secondary while the master instance is resized.

With an Aurora cluster, the instance replicas are replaced with larger ones and one of the larger instances is promoted to primary, while the smaller instances are shut down. With highly available...