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Oracle Linux Cookbook

You're reading from  Oracle Linux Cookbook

Product type Book
Published in Jan 2024
Publisher Packt
ISBN-13 9781803249285
Pages 548 pages
Edition 1st Edition
Languages
Authors (3):
Erik Benner Erik Benner
Profile icon Erik Benner
Erik B. Thomsen Erik B. Thomsen
Profile icon Erik B. Thomsen
Jonathan Spindel Jonathan Spindel
Profile icon Jonathan Spindel
View More author details
Toc

Table of Contents (16) Chapters close

Preface 1. Chapter 1: Oracle Linux 8 – Get It? Got It? Good! 2. Chapter 2: Installing with and without Automation Magic 3. Chapter 3: Exploring the Various Boot Options and Kernels in Oracle Linux 4. Chapter 4: Creating and Managing Single-Instance Filesystems 5. Chapter 5: Software Management with DNF 6. Chapter 6: Eliminating All the SPOFs! An Exercise in Redundancy 7. Chapter 7: Oracle Linux 8 – Patching Doesn’t Have to Mean Rebooting 8. Chapter 8: DevOps Automation Tools – Terraform, Ansible, Packer, and More 9. Chapter 9: Keeping the Data Safe – Securing a System 10. Chapter 10: Revisiting Modules and AppStreams 11. Chapter 11: Lions, Tigers, and Containers – Oh My! Podman and Friends 12. Chapter 12: Navigating Ansible Waters 13. Chapter 13: Let’s All Go to the Cloud 14. Index 15. Other Books You May Enjoy

Getting 99.999% availability and beyond

This recipe will discuss the differences between DR and HA and how to architect HA solutions. Before we get into that, let’s refine the definition of a few key terms:

  • High availability, or HA: This means protecting from the failure of a single component. Think of this as protecting against the failure of a system.
  • Disaster recovery, or DR: This is the failure of the data center or cloud region.
  • Availability nines: When referring to nines of availability, it is a way to quantify the uptime or reliability of a system by specifying the number of nines in the uptime percentage. Each nine represents a decimal place in the uptime percentage.

Here’s a breakdown of the most commonly used nines and their corresponding uptime percentages, assuming 24x7x365 operations:

...

Nines

Downtime per Year

Downtime per Month

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