Book Image

eZ Publish 4: Enterprise Web Sites Step-by-Step

Book Image

eZ Publish 4: Enterprise Web Sites Step-by-Step

Overview of this book

eZ Publish provides developers with a structure to build highly impressive applications and then quickly deploy them into a live environment. eZ Publish is complex, with a steep learning curve, but with the right direction it offers great flexibility and power. What makes eZ Publish special is not the long list of features, but what's going on behind the scenes. Created specifically for newcomers to eZ Publish, and using an example Magazine web site, this book focuses on designing, building and deploying eZ Publish to create an enterprise site quickly and easily. This tutorial takes eZ Publish's steep learning curve head-on, and walks you through the process of designing and building content-rich web sites. It makes the unrivalled power and flexibility of eZ Publish accessible to all developers. The book is organized around technical topics, which are handled in depth, with a general progression that follows the learning experience of the reader, and features a single magazine web site project from installation to completion and deployment. This hands-on guide helps the reader to understand the Content Management System to create a web 2.0-ready web site by creating new extensions or overriding the existing ones. In turn, it helps you to become confident when working in the eZ Publish administration area and offers an environment in which you can practice while working through the chapters.
Table of Contents (20 chapters)
eZ Publish 4: Enterprise Web Sites Step-by-Step
Credits
About the Authors
About the Reviewer
Preface
Advance Debugging

Caching system


Whenever we make a web request to a CMS that does not have a serious caching system, the web server is put under a severe test, as it has to perform the following things:

  • Read the settings

  • Query the database to retrieve the data requested

  • Load the template

  • Replace parsed variables with the required data

  • Send everything to the client

The process, depending on the page complexity, could be very simple, or very heavy to perform.

A famous site with many concurrent requests, maybe even a powerful machine filled with RAM and CPUs will not be able to support so much work and cause the web server to hang.

The caching system is born to help the server to deploy applications more effectively.

Note

You can find some documentation on caching on Wikipedia at http://en.wikipedia.org/wiki/Cache.

Usually the bottleneck is caused by the query and template complexity. eZ Publish provides a system for caching at several levels:

  • Template cache

  • Template compile

  • View cache

We will learn about each of these...