<div dir="ltr"><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jun 11, 2015 at 7:27 AM, D'ANDREA, JOE (JOE) <span dir="ltr"><<a href="mailto:jdandrea@research.att.com" target="_blank">jdandrea@research.att.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Given a host with SSDs *and* HDDs (arrays and/or volume groups may or may not be involved), can a Cinder scheduler filter advise Cinder to "Use any SSD on host X" ... or "Use specific SSD Y on host X?"<br>
<br>
I've been rummaging around the docs to find an answer to this as well. So far, no luck. This is all I could find, and it doesn't look current (plus the formatting is off):<br>
<br>
<a href="http://docs.openstack.org/developer/cinder/devref/filter_scheduler.html" target="_blank">http://docs.openstack.org/developer/cinder/devref/filter_scheduler.html</a><br>
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Please don't hesitate to ask for more/specific info if it would help.<br>
<br>
Clues, pointers to specific docs, and sample code welcomed/appreciated!<br>
<br>
jd<br>
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</blockquote></div><div class="gmail_default" style="font-family:monospace,monospace">Not sure if this is a fit for use case, but you can use volume-types for that and the filter scheduler will pick that up for you.</div><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_default" style="font-family:monospace,monospace">Check this doc here: [1]</div><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_default" style="font-family:monospace,monospace">NOTE:</div><div class="gmail_default" style="font-family:monospace,monospace">You don't have to use the multi-backend feature on a single node if you don't want to. This works still with multiple unique volume-nodes as well. Let me know if you get hung up, happy to help.</div><div class="gmail_default" style="font-family:monospace,monospace"><br></div><div class="gmail_default" style="font-family:monospace,monospace">Thanks</div><div class="gmail_default" style="font-family:monospace,monospace">John</div><div class="gmail_default" style><font face="monospace, monospace"><br></font></div><div class="gmail_default" style><font face="monospace, monospace">[1]: <a href="http://docs.openstack.org/admin-guide-cloud/content/multi_backend.html">http://docs.openstack.org/admin-guide-cloud/content/multi_backend.html</a></font><br></div></div></div>