Improve the Libvirt Performance

Aug 18, 2021 · 1 min read

The Problem:

When you’re having performance issues with libvirt, you can try this to improve it. The idea is use an specific configuration to improve the performance. This configuration is the creation of a new volume mounted in the /var/lib/libvirt/images directory.

It’s possible to use the same root volume for all the images, but it’s not recommended due to a performance issues.

The Solution:

dev="nvme0n1"  # The device to use
vg="vg1"      
lv="lv1"
mountpoint="/var/lib/libvirt/images" 

pvcreate /dev/$dev                 # Create the physical volume
vgcreate $vg /dev/$(basename $dev) # Create the volume group
lvcreate -l 100%FREE -n $lv $vg    # 100% of the free space
mkfs.xfs /dev/$vg/$lv              # Create the filesystem


echo "/dev/$vg/$lv $mountpoint                    xfs    defaults        0 0" >> /etc/fstab
mount -a

With this improvement, the performance will be improved.

Referecence

Thanks to Karim to share with me!!!