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<sect1 id="introduction">
<title>Introduction to &slony1;</title>

<indexterm><primary>Introduction To &slony1; </primary></indexterm>

<sect2> <title>What Is &slony1;</title>

<para>&slony1; is a <quote>master to multiple slaves</quote>
replication system for &postgres; supporting cascading and slave promotion.
Key features of &slony1; include:

<itemizedlist>
<listitem><para>&slony1; can replicate data between different &postgres;
 major versions</para></listitem>
<listitem><para>&slony1; can replicate data between different hardware
or operating systems</para></listitem>
<listitem><para>&slony1; allows you to only replicate some of the tables
to slave</para></listitem>
<listitem><para>&slony1; allows you to replicate some tables to one slave
and other tables to another slave</para></listitem>
<listitem><para>&slony1; allows different database servers to be the 
origin(master) for different tables</para></listitem>

</itemizedlist>

<sect2>
<title>About This Book</title>
<para>
This book is intended as an administration guide and reference for 
&slony1; version &version;  If you are using a different version of &slony1;
then you should refer to the administration guide for that version.
</para>
</sect2>



</sect1>

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