<div dir="ltr"><div class="gmail_default" style="font-family:monospace,monospace"><br></div><br><div class="gmail_quote"><div dir="ltr">On Mon, Sep 10, 2018 at 2:22 PM Jay S Bryant <<a href="mailto:jungleboyj@gmail.com">jungleboyj@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p><br>
</p>
<br>
<div class="m_-1424149385361824283moz-cite-prefix">On 9/10/2018 7:17 AM, Rambo wrote:<br>
</div>
<blockquote type="cite">
<div>
<div>Hi,all</div>
<div><br>
</div>
<div> At first,I find it is supported that we can <span style="color:rgb(51,51,51);font-family:-apple-system,system-ui,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif">define
hard performance limits for each volume</span> in
<a href="http://doc.openstack.org" target="_blank">doc.openstack.org</a>[1].But only can <span>define hard
performance limits for each volume type</span> in fact.
Another, the note"<span style="background-color:rgb(237,242,247);color:rgb(42,78,104);font-family:-apple-system,system-ui,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif">As
of the Nova 18.0.0 Rocky release, front end QoS settings are
only supported when using the libvirt driver.</span>",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.</div>
<div><br>
</div>
<div>[1]<a class="m_-1424149385361824283moz-txt-link-freetext" href="https://docs.openstack.org/cinder/latest/admin/blockstorage-basic-volume-qos.html" target="_blank">https://docs.openstack.org/cinder/latest/admin/blockstorage-basic-volume-qos.html</a></div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
</blockquote>
Rambo,<br>
<br>
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.<br>
<br>
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.<br></div></blockquote><div><span class="gmail_default" style="font-family:monospace,monospace">Right, the point is that now it's listed as supported ONLY on libvirt, as opposed to in the past it may have been supported on other hypervisors like hyper-v, xen etc. I don't know any of the details around how well those other implementations worked or what decisions were made but I just read the update as noting that currently only libvirt is supported, but not that anything has changed there.</span> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div text="#000000" bgcolor="#FFFFFF">
<br>
Jay<br>
<br>
<blockquote type="cite">
<div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>Best Regards</div>
<div>Rambo</div>
</div>
<div><u></u><u></u></div>
<br>
<fieldset class="m_-1424149385361824283mimeAttachmentHeader"></fieldset>
<br>
<pre>__________________________________________________________________________
OpenStack Development Mailing List (not for usage questions)
Unsubscribe: <a class="m_-1424149385361824283moz-txt-link-abbreviated" href="mailto:OpenStack-dev-request@lists.openstack.org?subject:unsubscribe" target="_blank">OpenStack-dev-request@lists.openstack.org?subject:unsubscribe</a>
<a class="m_-1424149385361824283moz-txt-link-freetext" href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev" target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev</a>
</pre>
</blockquote>
<br>
</div>
__________________________________________________________________________<br>
OpenStack Development Mailing List (not for usage questions)<br>
Unsubscribe: <a href="http://OpenStack-dev-request@lists.openstack.org?subject:unsubscribe" rel="noreferrer" target="_blank">OpenStack-dev-request@lists.openstack.org?subject:unsubscribe</a><br>
<a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev" rel="noreferrer" target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev</a><br>
</blockquote></div></div>