Globule User Manual

Berry van Halderen   Guillaume Pierre

Version 1.3.1

http://www.globule.org/

Abstract: Globule is a module for the Apache Web server that allows to replicate Web sites across multiple servers potentially located worldwide. This improves the site's performance, maintains the site available to its clients even if some servers are down, and to a certain extent it allows to resist to flash crowds.

A site owner must only define on which server(s) the site should be replicated. Globule handles the replication automatically. It also monitors the status of servers, so that it can automatically and transparently redirect Web clients to one of the available replicas.

• Table of Contents
• 1  Introduction
  • 1.1  Globule Features
  • 1.2  Terminology
  • 1.3  Known issues/limitations
• 2  Globule Installation
  • 2.1   Unix and Linux All-in-one installation
  • 2.2   Windows installation
  • 2.3   Source distribution
  • 2.4   Installation from RPMs and alikes
• 3   Server Configuration
  • 3.1   Basic Server Configuration
  • 3.2   Site Replication
  • 3.3   Client Redirection using DNS
  • 3.4   System Monitoring
  • 3.5   Dynamically generated content
• 4  Supporting utilities
  • 4.1  GlobuleUtil
  • 4.2  GlobuleCtl
• 5  Configuration Directive Reference
  • 5.1  Generic Directives
  • 5.2  Replication Directives
  • 5.3  Redirection Directives
  • 5.4  DNS Redirection
  • 5.5  Periodic tasks
  • 5.6  Obscure and rare settings
  • 5.7  Recognized units
• 6   Troubleshooting
  • 6.1  Compatibility with other Apache modules and settings
  • 6.2  System resource usage
• A   Copyright notices
  • A.1  Apache httpd server
  • A.2  PHP scripting language
  • A.3  Smarty template engine
  • A.4  GD graphical library
  • A.5  Webalizer web-log report generator
  • A.6  MySQL database
• B  File structures and protocols
  • B.1   report.log structure
• References