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2006-09-13 Raul Mateos <raulofpandora@gmail.com> 

* Updated /en/pandora_chapter1.xml

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2006-09-13 Raul Mateos <raulofpandora@gmail.com>
* Updated /en/pandora_chapter1.xml
2006-09-12 Raul Mateos <raulofpandora@gmail.com>
* Updated pandora_chapter 3 to 9.

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<?xml version="1.0" encoding="utf-8"?>
<chapter>
<title>Introduction</title>
<sect1>
<title>What is Pandora?</title>
<para>Pandora is a monitoring tool that allows a system administrator
to visually analise the status and efficiency of Operating
Systems, Servers, Applications and Hardware Systems - such as
firewalls, proxies, databases, Web servers, tunnelling servers,
routers, switches, processes, services, remote access servers and
so on. All integrated into an open and distributed architecture.
</para>
<para>
Pandora can be implemented over any operating system, with specific
agents for each platform. Pandora can also monitor any TCP/IP
hardware system, such as load balancers, routers, switches, printers
and so on.
</para>
<graphic fileref="images/esquema.png" valign="bottom" align="center"/>
<para>Pandora architecture is formed of four main components:</para>
<para><emphasis>- Web Console:</emphasis>
Pandora's user interface. The user controls and operates the system
with it. Several Web consoles can be implemented in a single system.
The Web console is written in PHP, and rests on a database and
a Web server. It is compatible with any platforms - GNU/Linux,
Solaris, Win2000, AIX, etc. However, the official supported platform
is GNU/Linux.
</para>
<para>
The console permits the user to
control the status of the agents, view statistical information,
generate graphs and data tables, keep a system incident control,
as well as to generate reports and change the alerts, agents,
and user profile settings.
</para>
<para><emphasis>- Core Server:</emphasis>
The core server is the receptor of
the data packages and generates the alerts - it is the brain
of the system. Several servers can work alongside for larger systems.
It has been developed in Perl and works over any platform, although,
the official platform is GNU/Linux.
</para>
<para>
The core server accesses Pandora
database, which is shared with the Web server, and stores the
processed data packages. The server is executed under the name of
"Demonio", and processes the packages stored in its file system.
The data is generated by the system agents. Despite the server's
low system resources comsumption and simple installation and
operation, the core server is the most critical element of the system.
The core server receives and processes the produced data, and fires
the alerts and the events.
</para>
<para><emphasis>- Central Database:</emphasis>
At the moment the system only supports MySQL. The central database
keeps all the information Pandora needs to work - agent data,
settings, user information, incidents, system settings, etc. The
system can use a MySQL cluster to store the information, or a high
disponibility solution for larger sytems.
</para>
<para>This database can work with any of
the platform officially supported by MySQL. Pandora can be implemented
with MySQL versions 3.0 and 4.0, although the latest is recommended.
</para>
<para><emphasis>- Pandora Agents:</emphasis> They collect all the
system's data. They are executed in each local system, although
they can also collect remote information by intalling monitoring
sytems for the agent in several different machines
- called satellite agents.
</para>
<para>
They have been developed to work under a specific platform,
making use of the specific tools of the used language: VBSCript/Windows
Scripting for Microsoft platforms (Win2000, WinXP y Win2003) and
ShellScripting for Unix - which includes GNU/Linux, Solaris, AIX, HP-UX
and BSD, as well as the Nokia's IPSO. Pandora agents can be developed
in virtually any language, given its simple API and being open source.
</para>
</sect1>
<sect1>
<title>Pandora Administration</title>