Overview of Pivotal Web Server
Pivotal Web Server is based on Apache HTTP Server, providing a familiar, proven foundation for your web tier. In addition to the standard features of Apache HTTP Server, Pivotal Web Server provides the following benefits:
- Ability to easily install multiple instances of Pivotal Web Server running on a single computer.
- Scalable management of multiple Web sites and servers; you can run and manage hundreds of instances of Pivotal Web Server.
- Support for heterogeneous environments (32- and 64-bit architectures): Red Hat Enterprise Linux (RHEL), Solaris, Ubuntu, and Microsoft Windows. Pivotal Web Server can be updated and patched across all servers at once.
information from: http://webserver.docs.pivotal.io/doc/54/topics/overview.html