Magento Two Databases Connection Install

Just in case your store has grown to the size that one single Database server cannot handle the load Magento has the ability to scale your database into Master-Slave figure. Below is how its done.
< config>
    < global>
        < resources>
            < db>
                < table_prefix>< ![CDATA[prefix_]]>< /table_prefix> < !-- database tables prefix, optional -->
            < /db>
            < default_setup> < !-- master connection -->
                < connection>
                    < host>< ![CDATA[]]>< /host>
                    < username>< ![CDATA[qa_setup]]>< /username>
                    < password>< ![CDATA[qa_setup]]>< /password>
                    < dbname>< ![CDATA[qa_magento_1_4_1_0]]>< /dbname>
                    < active>1< /active>
                < /connection>
            < /default_setup>
            < default_read> < !-- slave connection - to the "read-only" database -->
                < connection>
                    < host>< ![CDATA[]]>< /host>
                    < username>< ![CDATA[qa_read]]>< /username>
                    < password>< ![CDATA[qa_read]]>< /password>
                    < dbname>< ![CDATA[qa_magento_1_4_1_0]]>< /dbname>
                    < active>1< /active>
                    < model>mysql4< /model>
                    < initStatements>SET NAMES utf8< /initStatements>
                    < type>pdo_mysql< /type>
                    < use />
                < /connection>
            < /default_read>
        < /resources>
    < /global>
< /config>

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