The way that you configure Alfresco to use Solr 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.
Use this information to configure the Solr search subsystem, and to understand the Solr directory structure, configuration files, and properties.