noop, is essentially a first-in first-out (FIFO) queue with no extra logic. Each virtual machine can stop worrying about the disk, instead passing I/O requests along to the hypervisor to make a better decision about overall performance. Add “elevator=noop” to the kernel parameters in your boot loader’s configuration in /etc/grub.conf `echo noop > /sys/block/${DEVICE}/queue/scheduler`. Set ...