Applicable to:
- SolusVM
Symptoms
KVM settings cache:none and IO native settings are not propagated into actual config for file-based KVM VPS:
# virsh dumpxml kvm121 | grep native
#
It should be like this:
# virsh dumpxml kvm121 | grep native
<driver name='qemu' type='raw' cache='none' io='native'/>
Native IO parameter enabled via /usr/local/solusvm/data/kvm-io-native flag on KVM slave node
Cause
Such behavior caused by SolusVM bug #SVM-2965
Resolution
Thin-provisioning is an experimental feature and lacks of functionality. It is recommended to use LVM storage devices.
Until fix become available use the following steps as a workaround:
- Access SolusVM web interface and browse to VPS management page
- Click on Custom Config to access custom config page
- Copy content of Live Config field and paste it into custom config field
- In custom config field change disk driver as below:
Before
CONFIG_TEXT: <driver name='qemu' type='raw'/>
After
CONFIG_TEXT: <driver name='qemu' type='raw' cache='none' io='native'/>
- Tick Enable Custom Config checkbox and click on Save & Reboot button
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