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What is virtio? Is it really tune the performance?
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What is virtio? Is it really tune the performance?

danitfkdanitfk Member
edited October 2014 in Help

Hello all geeks

Recently I've faced to VirtO option in Linux-KVM.

Is it really tune the performance for VM's?

In fact VirtiO tune what in a VM?



p.s: virtio as IO virtualization
Thanks in advance

Comments

  • its supposed to make it faster and better. however the performance difference is very little.

  • @TarZZ92 said:
    its supposed to make it faster and better. however the performance difference is very little.



    thanks for your replay,
    virtio as IO virtualization , This makes Disk of VM's faster than none-virtio enabled?

  • danitfk said: This makes Disk of VM's faster than none-virtio enabled?

    its for everything. disk/network etc.

    personally i have yet to see a huge difference, you might get a few MB difference (maybe 180MB compare to Virtio 185MB)

  • I've never seens a difference IO wise although network it dramatic from what I've seen.

    I had a Windows box with the default Proxmox Intel network drivers and the network was crap, I was downloading at maybe 40-50MB/s I added the Virto drivers and changed the NIC on the VM settings and it worked, getting 80-100MB/s

  • Difference between VirtIO and SCSI is not that high (5-10%), differtence between IDE and VirtIO is massive (30%+).

  • @rmlhhd said:
    I've never seens a difference IO wise although network it dramatic from what I've seen.

    I had a Windows box with the default Proxmox Intel network drivers and the network was crap, I was downloading at maybe 40-50MB/s I added the Virto drivers and changed the NIC on the VM settings and it worked, getting 80-100MB/s

    Thanks for your replay ,
    I did start using VirtiO on some Linux server and I'll test and give some benchmark on those box.
    Also I think this needs more times for full-testing.

  • perennateperennate Member, Host Rep

    The performance difference that you'll get depends on the storage layer.

  • When I enabled virtio , I did create a VM and attach windows 2008 .iso , But Windows can't recognize the disks.

    Must I install some drivers or etc?

  • danitfk said: did create a VM and attach windows 2008 .iso , But Windows can't recognize the disks.

    Must I install some drivers or etc?

    you get that when you select virtio options. just mount this http://alt.fedoraproject.org/pub/alt/virtio-win/latest/images/virtio-win-0.1-81.iso

    and select OS etc and add drivers.

    Thanked by 1danitfk
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