title: virtual machine and cloud computing
body: <p>hi everybody 
  I'm very new  to IT field can anybody explain me relation between virtual machine and cloud computing . 
  In my firm they using a private cloud using ubuntu eucalyptus tool . They uses KVM.
  when ever i demand the resource  they says we will give u the virtual machine is cloud computing means providing virtual machine as i study cloud computing over the net it sound like a different technology .
  More important i want to know does the specification(characteristic ) of virtual machine  depend on the physical machine ?
   which they are imitating or we can provide our specification such as making a virtual machine of 100 GB storage while the physical machine has only 20 GB hard disk?or is it possible to make a virtual machine a virtual machine 0f 4 gb RAM while physical machine is having ram of 128 mb
  please explain me this concept I'll be thankful to all of you forever </p>