Hi, I use LVM volumes as guest VM disk. I'm wondering if setting setting the io scheduler inside linux gest has any effect (with virtio disk driver and with emulated scsi or ide driver) And if it has affect what's better choice ? My thoughts is that if changing the scheduler inside guest has affect - then it's probably best to use noop scheduler inside the guest and let the hypervisor linux decide according to it's scheduler. So what I don't understand is if there are two levels of io scheduling , one inside the guest (the redundant one and setting it to noop will minimize it's affect) and other inside the hypervisor linux?(or just one level in the hypervisor) Probably with virtio driver tthere is no io scheduling inside the guest, but is it so with emulated drivers too? And also is there any difference in io scheduling if I use image file instead of LVM? Thanks a lot Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
