On 9/10/2018 7:17 AM, Rambo wrote:
Hi,all
At first,I find it is supported that we can define hard
performance limits for each volume in doc.openstack.org[1].But only
can define hard performance limits for each volume type in fact.
Another, the note"As of the Nova 18.0.0 Rocky release, front end QoS
settings are only supported when using the libvirt driver.",in fact,
we have supported the front end QoS settings when using the libvirt
driver previous. Is the document wrong?Can you tell me more about this
?Thank you very much.
[1]https://docs.openstack.org/cinder/latest/admin/blockstorage-basic-volume-qos.html
Rambo,
The performance limits are limited to a volume type as you need to have
a volume type to be able to associate a QoS type with it. So, that
makes sense.
As for the documentation, it is a little confusing the way that is
worded but it isn't wrong. So, QoS support thus far, including Nova
18.0.0, front end QoS setting only works with the libvirt driver. I
don't interpret that as meaning that there wasn't QoS support before that.
Jay
Best Regards
Rambo
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