Book Image

Mastering SaltStack - Second Edition

Book Image

Mastering SaltStack - Second Edition

Overview of this book

SaltStack is a powerful configuration management and automation suite designed to manage servers and tens of thousands of nodes. This book showcases Salt as a very powerful automation framework. We will review the fundamental concepts to get you in the right frame of mind, and then explore Salt in much greater depth. You will explore Salt SSH as a powerful tool and take Salt Cloud to the next level. Next, you’ll master using Salt services with ease in your infrastructure. You will discover methods and strategies to scale your infrastructure properly. You will also learn how to use Salt as a powerful monitoring tool. By the end of this book, you will have learned troubleshooting tips and best practices to make the entire process of using Salt pain-free and easy.
Table of Contents (20 chapters)
Mastering SaltStack Second Edition
Credits
Foreword
About the Author
About the Reviewer
www.PacktPub.com
Preface

Looking at asynchronous programming


Considering that asynchronous is in RAET's name itself, it should come as no surprise that RAET is a type of asynchronous protocol. TCP is not an asynchronous protocol by nature, but it can be used for asynchronous tasks. UDP isn't exactly asynchronous either; it uses more of a "fire and forget" methodology.

So what is asynchronous programming? First of all, let's examine what synchronous programming is. Classical programming is synchronous by its very nature. A program issues a command and then waits for it to complete before issuing the next command.

In terms of more complex software, a program will start with a series of commands, which will usually end up calling subroutines or functions, which themselves may call more subroutines and functions. Each time a piece of code calls another piece of code, it must wait until that code completes before moving onto its next step.

This kind of code is limited by blocking. This means that if you have a number of...