scalability.html

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        ==== Postgres-XC scalability description ===

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<title>Postgres_XC Scalability</title>

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<h2>
Postgres-XC Scalability
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<p>
This page describes the scalability of Postgres-XC.
</p>
<p>
To evaluate the scalability, we used DBT-1 benchmark with a couple of modification as follows.
<ul type="disc">
<li>
Connection to the backend is modified from ODBC to libpq to allow to put more workload.
</li>
<li>
Columns are added to some of the tables to determine what server each tuple should go.
</li>
</ul>
</p>
<p>
For details of these changes and configuration of servers and networks, 
please refer to the architecture document.
<a href="https://sourceforge.net/projects/postgres-xc/files/Version_0.9/PG-XC_Architecture.pdf/download" 
   target="_blank">
(download)
</a>
</p>
<p>
The following figure shows Postgres-XC's scalability via number of servers.
Dotted line shows ideal scalability.
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<img src="image/scalability.jpg" >
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