A very popular scenario is what we call a typical hybrid scenario: You have all the I/O devices served by the server i5/OS partition (virtual I/O), except for the network connections (direct I/O for network adapters). You can easily set up a firewall or even a demilitarized zone (DMZ) scenario that way. 2.2.7 Virtual I/O server The Virtual I/O server is an appliance partition that can be added to a System i or System p to provide virtualized I/O resources. When the Virtual I/O server feature code has been installed on the Managed System an AIX or Linux-based Virtual I/O server partition can be installed on the system. Virtual I/O server can be used to provide virtualized I/O resources (that is, disk) as well as bridging of network traffic between physical and virtual networks. Note: The Virtual I/O server is an appliance partition that is not intended to run applications or for general use. Typically, the Virtual I/O server feature code will not be enabled on System i as equivalent functions are integrated into i5/OS itself. 2.3 Planning for resource allocation Planning for the Linux implementation on the System i platform consists of determining resource allocation in the following areas: Processor Memory