caching

I learned a valuable lesson last week. First, some context. One of DrupalEasy's clients is a large international industry association that is currently running a large Drupal 9 site with about a dozen custom modules and well over 150 contributed modules. We were brought onto the project a couple of years ago to do some custom module development, but until recently weren't all that involved in the overall site maintenance and development. As part of a recent task we've been working on, I stumbled on an issue that was occurring only on my local, and not in a way that

Having a basic understanding of caching is a requirement of being a professional Drupal developer. Unfortunately, there can be many layers of caching which can make it challenging to figure out exactly how best to configure cache settings and troubleshoot potential caching issues. Web page caching can be thought of as moats around the castle, where each moat is a caching layer and the castle can be thought of as the site's web, database, and other origin servers. HTTP headers provide a mechanism for the client (usually a web browser) and a server (usually a web server) to exchange information