Dear Elhossiny,

Try the following sources for ideas:

http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5705847&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5705847

http://link.springer.com/chapter/10.1007/978-3-642-16515-3_34#page-1

http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5301850&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5301850

Good luck,

Simon Cleveland

 thanks for your answer on my question

how i can calculate the actual occupied time for host or vm ?

thanks

You can see the paper of Chenhong Zhao et al. (2009).

The value is dependent to the parameters and the used algorithm