The way that you configure Alfresco to use Solr 4 depends on how you have installed Alfresco. If you install Alfresco using the setup wizard, Solr 4 is installed and enabled automatically. Solr 4 is installed in the same Tomcat container as Alfresco, and the connection URL is unchanged from the default. The Solr 4 home is within the Alfresco home directory.
This topic provides information on configuring the Solr 4 search subsystem. It also outlines the Solr 4 directory structure, configuration files, and properties.