Most sites choose to configure their VIVO system with an Apache HTTPD web server to accept requests and then proxy them to the VIVO Tomcat context. This will make Vitro available at http://example.com instead of http://example.com:8080/vitro. It will also allow the use of external authentication.
There are at least 2 ways to do this, along with a 3rd method that hasn't been documented yet.
In the tomcat webapps directory, create a symbolic link called ROOT to vivo. This will redirect all requests to root to the vivo application.
Note: the value for maxThreads (320) is equal or greater than the value for MaxClients in the apache's httpd.conf file.
3. in the tomcat/conf directory - create a ROOT.xml with the context element as stated above. This was suggested, but somebody needs to verify and complete this document.