KVM, or Kernel-based Virtual Machine, is a virtual machine implementation that uses the Linux kernel. Invented and maintained by Qumranet, a technology start-up acquired by Red Hat in 2008, KVM is included out-of-the-box with Linux kernel versions 2.6.20 and above.
|I/O performance comparison|
|Disk I/O (time to copy a 100 MB file using dd)||0.97 seconds, 105 MBps||0.63 seconds, 161 MBps||0.545 seconds, 188 MBps (write-back mode)|
|Network I/O speed (using iperf)||1.31 GBps||2.01 GBps / 3.3 GBps with virtio||4.61 GBps|