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)

EC2 high availability scenarios

There are several approaches to making our EC2 instances and the applications running on them highly available. The approach we take will be dependent on the SLA that we need to achieve in our application, that is, whenever it is higher than the SLA of the EC2 service. When we are designing applications, we should always be thinking of them as disposable objects that do not need to be protected, but that kind of approach is not possible with a lot of legacy and enterprise workloads being moved to the cloud. Thus when talking about high availability, we need to determine the following:

  • Are our instances stateful or stateless?
  • Are tasks being processed by our instances sticky or distributed?
  • What does our SLA define as the percentage of high availability?
  • What is the Recovery Time Objective (RTO) and Recovery Point Objective (RPO) when failures occur...