Has any one met with research regarding comparison in IOPS performance between virtual machine and physical one.
I am interested in information about 3 configurations (assuming OS is storage that is not tested):
1. IO from psychical OS to drive.
2. IO from virtual Os to drive that is part of datastore.
3. IO from virtual Os to drive that is passthrou to virtual machine.
I found information about CPU and memory usage but i didn't find straight answer to my questions
Theoretical answer is also appreciated.