Server scaling is the process of adding more resources (CPU, memory, disk space, etc.) to a server (or servers) to help with performance. This might be a single server, or a cluster of different machines. When we talk about server scaling, think more about the resources and less about the specific hardware. Modern servers may not always resemble a physical machine that you can open up and insert additional RAM into. But the theory is the same: more memory means the server can handle more concurrent requests.
Sometimes your Drupal site is optimized, but traffic is still high and takes most of the server’s resources. In order to sustain that load you'll need to scale your server up.
Sometimes you don’t have the resources or expertise to implement caching optimizations, refactoring code, and modifying slow queries -- all of which would improve Drupal's performance. In these cases, you may consider server scaling.
Server scaling can be done in two ways: horizontally or vertically.
In this tutorial we'll:
- Learn what server scaling is
- Discuss examples of both horizontal and vertical server scaling
- Talk about when to choose horizontal versus vertical scaling strategies
By the end of this tutorial, you should understand the concept of server scaling and how it applies to a Drupal application.
No one likes to wait for a slow site to load. Not me, not you, and definitely not search engines. And the effect of site load times on things like SEO, user bounce rates, purchase intent, and overall satisfaction are only going to become more pronounced over time.
Drupal is a modern web framework that is capable of serving millions of users. But every site is unique, and while Drupal tries hard to be fast out of the box, you'll need to develop a performance profile, caching strategy, and scaling plan that are specific to your use case in order to be truly blazing fast.
Drupal site performance depends on multiple components, from hardware setup and caching system configuration to contributed modules, front-end page weight, and CDNs. Experienced Drupal developers looking to optimize their applications know where to start looking for potential savings. They can manipulate settings and combinations of these components to achieve the desired results. Our goal with this set of tutorials is to help explain the process and provide you with the insight that comes with experience.
In this tutorial we'll:
- Introduce high-level performance concepts for Drupal that we'll then cover in more detail elsewhere
- Provide an overview of the main Drupal performance components.
By the end of this tutorial, you should understand what components around your Drupal application are responsible for site performance.
In this tutorial, you will learn how to get a Drupalize.Me tutorial demo site up and running using Pantheon. You'll learn about the various components that make up the Drupalize.Me demo site downloads and how each part should be imported. By the end of this lesson, you'll know how to create a Drupalize.Me demo site on a free Pantheon Dev instance so that you can follow along with the trainer in the Drupalize.Me video tutorial.
Additional resources
In this tutorial, you will learn how to use Acquia Dev Desktop 2 to get a Drupalize.Me tutorial demo site up and running. You will learn how to import a Drupal codebase and database containing a finished site for an individual tutorial on Drupalize.Me. This will enable you to walk through the lesson and see what was accomplished on the site during the lesson.
Additional resources
Drupal's content moderation and workflow tools allow you to configure and support a flexible multistep publication process.
An overview of some of our favorite Drupal documentation resources.
Upgrading is the process of moving your site from a previous major version of Drupal to a newer version, for example from Drupal 7 to Drupal 11.
Testing in Drupal
TopicDrupal includes the PHPUnit testing framework. This enables us to write unit and functional tests to attempt to minimize the number of bugs in our application.
Contributing to Drupal
TopicAs an open source project, Drupal depends on community contributions in many forms including documentation, code, translation, speaking, organizing events, mentoring others, and even donating money.
Drush
TopicDrush is a command line interface that enables you to interact with your Drupal site without clicking around the graphical user interface (GUI).
Cron
TopicTo ensure that your site and its modules continue to function correctly, a set of administrative operations should be performed periodically. These operations are referred to as cron tasks. Examples of cron tasks are: checking for module and theme updates, indexing content for search, or cleaning up temporary files.
Every Composer project is made up of a few standard files and directories. This tutorial provides an overview of the anatomy of a Composer project, and the essential files and directories used by Composer, including:
- What are composer.json and composer.lock files?
- What is in a composer.json file?
- What is the /vendor directory?
By the end of this tutorial you should be able to recognize the standard files and directories in a Composer project and know what they are each used for.
This tutorial demonstrates the value of using Composer. This demonstration will employ the most basic use case of using Composer to create a new, non-Drupal application that writes a message to the system log. It will encompass the fundamental concepts of Composer installation, requiring (installing) a new dependency, autoloading it, and implementing it.
In this tutorial we'll:
- Install Composer
- Use Composer to start a new project
- Use Composer to require a 3rd party dependency
- Use the required code in an example application
By the end of this tutorial you should be able to explain the value of Composer, and have Composer installed and working on your local machine.
This tutorial provides an overview of the concept of an "artifact" and provides step-by-step instructions for deploying a Composer-managed Drupal application to a hosting environment.
In this tutorial we'll:
- Define what an "artifact" is
- Look at how to use Composer and a build process to create and deploy an artifact
- Talk about the benefits of this approach
By the end of this tutorial you should have a general understanding of the steps required in order to deploy a Composer-managed project into production.
You will inevitably encounter Composer issues that require troubleshooting. This tutorial aims to provide some general troubleshooting advice for common Composer issues.
In this tutorial we'll look at:
- Common issues you'll encounter when using Composer
- Solutions to these common issues
By the end of this tutorial you should have some ideas of how to solve common issues that you might encounter when using Composer to manager your application's dependencies.
Composer packages use semantic versioning to allow you to differentiate among different releases of a project. Knowing how this works, and how to specify a version constraint when requiring a Composer package are an important part of using Composer.
In this tutorial we'll:
- Get an overview of semantic versioning
- Look at how Composer version constraints work and related best practices
- Learn how to define Composer package requirements such that you can quickly update all of your application's dependencies without breaking existing functionality
By the end of this tutorial, you should understand how semantic versioning relates to Composer, and how to specify version constraints for packages in your Composer project.
What Is Composer?
FreeComposer is the preferred dependency management solution for PHP. List your project's dependencies in a composer.json file and, after issuing a few commands in the CLI, Composer will automatically download your project's dependencies and set up autoloading for you. Composer is analogous to NPM in the Node.js world, or Bundler in the Ruby world.
Drupal core uses Composer to manage non-Drupal dependencies like Guzzle and PHPUnit. An increasing number of contributed modules also use Composer to integrate third party PHP libraries into Drupal.
This series provides guidance for Drupal developers and site builders who would like to learn to use Composer to build and maintain a Drupal application.
It covers high-level concepts about Composer and walks you step-by-step through creating a new application, downloading PHP libraries, and implementing them using Composer!
It also covers Drupal-specific Composer configuration and provides guidance for accomplishing common Drupal tasks like updating core and installing a new module.
In this tutorial we'll:
- Familiarize ourselves with the general concepts of dependency management
- Learn about Composer and the role it plays in a PHP/Drupal project
- Learn about some advantages and disadvantages of using Composer
By the end of this tutorial you should be able to explain what Composer is, what it's used for, and make the case for using it in your own projects.
There's been a lot written about API design, it's probably not surprising there are several books written about the subject. It also seems like nearly every cloud-based service provides an API to allow access to your data. In this tutorial, we'll attempt to condense this information and answer the following questions:
- Are there different types of API paradigms?
- What kinds of considerations do we need to make when building an API for our decoupled site?
- And, what's this REST thing everyone is talking about?
Let's dig into those questions one at a time.
Decoupling Explained
FreeIf you're interested in decoupling Drupal, there's a good chance you've heard at least some of the buzz in the Drupalverse about "headless" or decoupled Drupal. Or perhaps you watched Dries' keynote from DrupalCon Barcelona or read Dries' blog post about the future of decoupled Drupal. Whatever the case may be, this tutorial and the ones that follow will walk you through building a simple decoupled blog. In Dries' terminology the demo site we'll be building is "fully decoupled." While it would be trivial to adopt similar techniques to build a progressively decoupled site, let's dig a bit deeper into what it means to build a decoupled Drupal site.