Requirements

To use virtual machines in a security class, it is important to recognize the necessary resources.

Processing power: QEMU does not have a specific requirement. However, a Pentium 3 will be slow. A Pentium 4 running at 2GHz or faster should be sufficient. A dual core processor will be very helpful when two virtual machines need to be run at the same time.
RAM: QEMU itself does not require much memory. However, the memory requirement of each virtual machine translates to physical memory requirement from the real computer. Each server needs at least 256MB of RAM. This means the host machine should have at least 1GB of RAM to run two virtual servers.
Disk space: A virtual server needs about 300MB for disk space. It is safer to allocate 500MB for each virtual server. Because we need to run two virtual machines at the same time, about 1GB of disk storage should be available. QEMU can work from a portable storage device (such as a USB removable hard disk drive). It is better to use a portable hard disk drive than a flash-based thumb drive because a hard disk drive is faster.