Basic Arch of www2.computer.org

1. www2.computer.org
Basic Architecture
Leo Wadsworth, Staff Manager
April 2008

2. Major Components
Ubuntu Linux
Xen Virtual
Servers
HAProxy
Liferay Portal
Apache web
servers
Tomcat servlet
container
Alfresco content
management
MySQL databases
OpenX ad server
CAS authentication
Alfresco Cache
Server
DL Cache server

3. Debian-based Linux distribution
Server and desktop versions
Easy administration tools
Enterprise cross-domain
authentication and single sign on
Integrated with IEEE LDAP
Uses IEEE Web Accounts

4. HAProxy
Controls load
balancing and failover
Admin tool gives easy
visibility into entire
system
Xen Virtual Servers

5. Standard LAMP Stack
Apache Tomcat

6. Award-winning enterprise class open-
source portal server
Integrated with IEEE web accounts
True portal system with tightly integrated
collaborative tools
Includes over 60 portlets
Page layout of portlets done using drag
and drop
Available on a variety of platforms, we are
using Tomcat

7. Award-winning enterprise class
open-source document and content
management system
Able to manage millions of
items/documents
Integrated with IEEE web accounts
Available on a variety of platforms,
we are using Tomcat

8. World leading enterprise class open-
source advertising server
Written using PHP
Able to server millions of
impressions in a variety of formats
We are running PHP on Apache
webservers

9. Alfresco Cache Server
Alfresco Cache Server
Increases the speed of serving Alfresco
content
Consists of clustered Apache servers –
simple, robust, fast
Simplifies the role and implementation
of the Alfresco server

10. Digital Library Cache Server
Increases the speed and robustness
of serving Digital Library content
Provides XML data to the Digital
Library portlet
Designed for future growth and
capabilities

11. Overall Architecture