May 25, 201511 yr I am hoping i missed a critical step. I have two VM's (windows 8.1) running on a single cache drive. Both VM's are significantly slower than when i used Xen. Disk usage hits 100% on both VM's nearly all the time. I am using the drivers from virtio-win-0.1.96.iso. Any tips? Thoughts?
May 25, 201511 yr Did you convert Xen VMs or install new in KVM? My experience is that VMs are faster in KVM.
May 25, 201511 yr Author I tried to convert the XEN Vm's which did not work at all (windows freaked out due to a config change) Then i reinstalled fresh on a brand new image under kvm. I used the guide on the wiki, I may not be missing anything but i sure hope i did lol.
May 25, 201511 yr Author I recommend we get the wiki changed.... Bad advice on there to set Bus type to IDE. "IDE - Slow Write in the Guest System SCSI - Faster Write(as IDE) in Guest System VIRTIO - Fastest Write (more that SCSI and IDE) in the Guest System, but only with extra Drivers." https://kparal.wordpress.com/2012/09/12/kvm-disk-performance-ide-vs-virtio/ VirtIO is substantially faster for disk I/O operations. If you don’t use it, you should definitely consider it. If you run a lot of installation tests or other heavy disk operations like I do, it can be a pretty significant difference in performance.
May 25, 201511 yr Author It will not let me just swtich to virtio only IDE and SATA (which breaks windows).... eitherway looks like ANOTHER reinstall is headed my way... whew
May 25, 201511 yr Author Happy to report that using the virtio option over the IDE option has given me huge performance increases and has fixed my problem. =)
Archived
This topic is now archived and is closed to further replies.