Hello,   We are considering installing CDH on virtual machines but we have some performance concerns. We should work on the virtual machine, although we estimate it will work better on the physical server. Are there any configuration recommendations that you would suggest about running clusters on virtual machines?   We should work on the virtual machine, although we estimate it will work better on the physical server. Are there any configuration recommendations that you would suggest about running clusters on virtual machines?   How does the difference between a physical server and virtual server in hadoop cluster?   Thanks, Uygar   ... View more