webpage/intro.html at master · postgres-x2/webpage · GitHub

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
	  "http://www.w3.org/TR/htmol4/strict.dtd">
<!--
      ==== Introduction to Postgres-XC ====
-->
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html";charset=UTF-8>
<title>Postgres_XC Introduction</title>
<link rel="stylesheet" type="text/css" href="pgcx_1.css">
</head>
<body bgcolor=#FFFFFF>
<!-- === Welcome === -->
<h2>
Welcome to Postgres-XC
</h2>
<p>
Welcome to Postgres-XC, the only known PostgreSQL cluster solution
which provides for both read and write scalability.
</p>
<p>
This website includes useful information to understand, download, build, deploy and use Postgres-XC.
</p>
<p>
If you are familiar with the project outline, please visit individual pages
as desired.
If not, we advise you to first visit each page of this site to obtain
a proper understanding of Postgres-XC and how it can help you.
</p>
<p>
All of the Postgres-XC team members are looking forward to continuing to improve Postgres-XC and working with you to help solve  your database scalability problems.
</p>
<p>
Enjoy.
</p>
<!-- === Postgres-XC outline === -->
<h2>
What Is Postgres-XC?
</h2>
<p>
Postgres-XC is an open source project to provide a write-scalable,
synchronous multi-master,
transparent PostgreSQL cluster solution.
It is a collection if tightly coupled database components
which can be installed in more than one hardware or virtual machines.
</p>
<p>
Write-scalable means Postgres-XC can be configured
with as many database servers as you want and handle many more writes
(updating SQL statements) compared to what a single database server can not do.
</p>
<p>
Multi-master means you can have more than one database server
that clients connect to which provide a single, consistent cluster-wide view of the database.
</p>
<p>
Synchronous means any database update from any database server is
immediately visible to any other transactions running on different masters.
</p>
<p>
Transparent means you (and your applications) do not have to worry about how your data is stored
in more than one database servers internally.
</p>
<p>
You can configure Postgres-XC to run on multiple servers.
Your data is stored in a distributed way, that is,
partitioned or replicated, as chosen by you for each table.
When you issue queries, Postgres-XC determines
where the target data is stored and issues corresponding queries
to servers containing the target data.
</p>
<!-- === Overview of the whole system === -->
<p class="plain">
<img src="image/SystemOutline.png" width="650">
</p>
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</body>
</html>