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* Use virtio drivers for Windows KVM VMs
 
* Use virtio drivers for Windows KVM VMs
 
*: https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/virtio-win.iso
 
*: https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/virtio-win.iso
* Make sure metadata space is pre-allocated in case of qcow2 disk images
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*:After creating VM use option to "Customize configuration before install".  Add another storage device of type CD/DVD ROM and select above iso.  Then using OS installation to detect hard-disk choose "Load driver" and choose appropriate drivers from CD/DVD (Typically amd64/OS") folder.
*: https://serverfault.com/questions/407842/incredibly-low-kvm-disk-performance-qcow2-disk-files-virtio
 
 
* Make sure cache is set to none (Preferred).  Cache option of write-through has very bad performance.  Using write-back may lead to data loss in case of abrupt shutdown.   
 
* Make sure cache is set to none (Preferred).  Cache option of write-through has very bad performance.  Using write-back may lead to data loss in case of abrupt shutdown.   
 
*: http://www.ilsistemista.net/index.php/virtualization/11-kvm-io-slowness-on-rhel-6.html?start=4
 
*: http://www.ilsistemista.net/index.php/virtualization/11-kvm-io-slowness-on-rhel-6.html?start=4
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*: https://pve.proxmox.com/wiki/Performance_Tweaks
 
*: https://pve.proxmox.com/wiki/Performance_Tweaks
 
*: https://unix.stackexchange.com/questions/47082/how-to-improve-windows-perfomance-when-running-inside-kvm
 
*: https://unix.stackexchange.com/questions/47082/how-to-improve-windows-perfomance-when-running-inside-kvm
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* In case you cannot use raw format and use of qcow2 is required, then make sure metadata space is pre-allocated
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*: https://serverfault.com/questions/407842/incredibly-low-kvm-disk-performance-qcow2-disk-files-virtio
  
 
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It would also make sense to change NIC from e1000 to virtio and install related network drivers from the virtio iso linked above.
  
 
<yambe:breadcrumb self="Creating Windows VMs with fast disk input output (io)">CentOS_8.x_KVM|KVM</yambe:breadcrumb>
 
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Revision as of 09:17, 13 November 2019

Home > CentOS > CentOS 8.x > Virtualization > KVM > Creating Windows VMs with fast disk input output (io)

CentOS 8.x KVM Creating Windows VMs with fast disk input output (io)

While creating Windows VM use following recommendations along with mentioned references

It would also make sense to change NIC from e1000 to virtio and install related network drivers from the virtio iso linked above.

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