Resource poverty is a fundamental constraint that severely limits the class of applications that can be run on mobile devices. In this paper,authors put forth a vision of mobile computing that breaks free of this fundamental constraint. In this vision, mobile users seamlessly utilize nearby computers to obtain the resource benefits of cloud computing without incurring WAN delays and jitter. Rather than relying on a distant “cloud,” a mobile user instantiates a “cloudlet” on nearby infrastructure and uses it via a wireless LAN.

Question answer session

Why do they use virtual machine ?

A virtual machine (VM) is a simulation of a machine (abstract or real) that is usually different from the target machine (where it is being simulated on). This type of software makes it possible to perform multiple identical executions on one computer. In turn, each of these executions runs its own operating system. This allows multiple applications to be run on different operating systems, even those they were not originally intended for. Through the use of the hardware virtual machine software, the user has a seemingly private machine with fully functional hardware that is separate from other users. Such software also makes it possible for users to boot and restart their machines quickly, since tasks such as hardware initialization are not necessary.