101 Green Software
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101 Green Software

A Practical Guide for Developers & Architects

About the Book

Did you know that the greenhouse gas emissions from software applications surpassed those of the aviation industry in 2021? As our reliance on technology continues to grow worldwide, so does the environmental impact of software applications.

But as software developers, we have the power to make a positive impact in the fight against climate change. That's where this book comes in.

101 Green Software provides practical guidelines for building sustainable software that reduces the resources needed for running data centers, networks, and end-user devices. By following these guidelines, you can significantly reduce your carbon footprint while saving on cloud bills.

Whether you're looking to re-architect existing applications or build new ones from scratch, this book will show you how to make a meaningful difference in the world. With minimal development effort, you can create environmentally friendly software that helps prevent climate change.

Don't miss out on the opportunity to be part of the solution. Buy 101 Green Software today and join the growing movement of developers committed to building a better, greener world.

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    • Software Architecture
    • Cloud Computing
    • Software Engineering
    • Java
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About the Author

Ioannis Kolaxis
Ioannis Kolaxis

Ioannis Kolaxis is a Director at Accenture Technology Sustainability Innovation, focusing on Green Software innovations. He has been previously developing software for Atos, IBM, and Siemens.

Ioannis was a kid in primary school when he first saw the green screen with the blinking cursor of an Amstrad CPC6128. This computer opened a new world to him, a world of continuous exploration and creation through programming.

He invented a novel way of working remotely, having filed five patents for software solutions. He was awarded twice the first prize for coming up with the most innovative ideas at Atos Innovation Week 2020 and 2021.

Ioannis frequently speaks at conferences and meetups, including GOTO Amsterdam 2022, Devoxx Ukraine 2021, and Oracle Code One 2019.

Visit his website to learn more: https://kolaxis.dev


The Book
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  • English

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Table of Contents

  • About this book
    • What can you do to prevent climate change?
      • Software decarbonization
      • Decarbonized software
    • How can you build green software?
    • The author’s perspective
  • 1 Don’t send your data around the world
    • 1.1 Place your servers close to your end-users
    • 1.2 Reduce the size of data sent over the network
      • Filter out unnecessary data
      • Compress data
      • Cache data
    • 1.3 Process data at its source
    • 1.4 Adopt energy-efficient protocols
      • How HTTP/2 works
      • Energy efficiency of HTTP/2
    • 1.5 Summary
  • 2 Run your software on carbon-free electricity
    • 2.1 Carbon-free electricity explained
    • 2.2 Electricity mix in power grids
      • Base load
      • Intermediate load
      • Peak load
    • 2.3 Assessing the electricity mix
    • 2.4 Choose a data center that consumes carbon-free energy
    • 2.5 Run your code when the sun shines
    • 2.6 Send your code where the sun shines
      • Run your code where it’s cold outside
      • Build a green Kubernetes scheduler
    • 2.7 Summary
  • 3 Get rid of redundant servers
    • 3.1 Redundant servers explained
    • 3.2 Adopt containers for high availability
    • 3.3 Leverage automation for high availability
    • 3.4 Get rid of redundant data centers
    • 3.5 Trade-offs
    • 3.6 Summary
  • 4 Introduce a stop/start mechanism
    • 4.1 Run your application as serverless functions
    • 4.2 Run your application as serverless containers
    • 4.3 Prefer serverless services
    • 4.4 Trade-offs
    • 4.5 Summary
  • 5 Adopt green programming languages
    • 5.1 Prefer compiled languages
    • 5.2 Should you rewrite your application?
    • 5.3 Summary
  • 6 Decarbonize Java applications
    • 6.1 Upgrade to the latest version of Java
      • Benefit from compact strings
      • Enable Application Class-Data Sharing
      • Shrink your Java Runtime Environment
    • 6.2 Use a JVM that consumes less memory
    • 6.3 Use a Java framework that consumes less memory
    • 6.4 Summary
  • 7 How green is your software?
    • 7.1 Reduce cloud costs for greener applications
      • Get your cloud application Well-Architected
    • 7.2 Can you assign energy labels to software applications?
      • What are the boundaries of your application?
      • How does your application compare to others?
    • 7.3 Measure software carbon emissions
      • From annual reporting to daily monitoring of carbon emissions
      • How to monitor software carbon emissions
      • Identify carbon emission hotspots
      • Track proxy sustainability metrics
      • How will you monitor the greenness of your software?
    • 7.4 Summary
  • 8 How will you contribute?
    • 8.1 Set priorities
    • 8.2 Take your first steps
    • 8.3 Track your progress
    • 8.4 Reinvent software development
  • References
  • Author biography
  • Notes

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