Hi Diego,<div><br></div><div>Thank you for the link.</div><div><br></div><div>Can you comment further on why you do not recommend overcommitting RAM? </div><div><br></div><div>By default, OpenStack overcommits RAM by a ratio of 1.5. Do you change this setting to 1?</div>
<div><br></div><div>What kind of side effects have you seen from overcommitting?</div><div><br></div><div>Thanks,</div><div>Joe</div><div><br><br><div class="gmail_quote">On Mon, Sep 24, 2012 at 1:57 AM, Diego Parrilla Santamaría <span dir="ltr"><<a href="mailto:diego.parrilla.santamaria@gmail.com" target="_blank">diego.parrilla.santamaria@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all,<div><br></div><div>We wrote several months ago a quick overview about how to oversubscribe with StackOps Enterprise Edition. Surprisingly it was a presentation our customer they love :-o</div>
<div><br></div><div>Here goes the presentation in slideshare:</div>
<div><a href="http://www.slideshare.net/stackops/stackops-openstack-nova-sizing-service-definition" target="_blank">http://www.slideshare.net/stackops/stackops-openstack-nova-sizing-service-definition</a></div><div><br></div>
<div>Cheers</div>
<div>Diego<br clear="all"> -- <br><span style="border-collapse:separate;font-family:Times"><span style="border-collapse:collapse;font-family:arial,sans-serif"><div align="left" style="font-size:13px"><div><font><span lang="ES" style="font-family:Arial">Diego Parrilla<br>
<a href="http://www.stackops.com/" title="file:///C:/Documents%20and%20Settings/carolina.capsir.per1/Application%20Data/Microsoft/Signatures/www.garrigues.com
www.garrigues.com" style="color:rgb(7,77,143)" target="_blank"><span title="file:///C:/Documents%20and%20Settings/carolina.capsir.per1/Application%20Data/Microsoft/Signatures/www.garrigues.com"></span></a></span></font><font face="Arial" size="2" style="font-family:arial,helvetica,sans-serif"><b>CEO</b><font size="1"><br>
</font></font><span style="border-collapse:separate;font-family:Times;font-size:medium"><span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px"></span></span><b><font face="Arial" size="2" style="font-family:arial,helvetica,sans-serif"><a href="http://www.stackops.com/" target="_blank"><b>www.stackops.com</b></a> | </font></b><font face="Arial" size="2" style="font-family:arial,helvetica,sans-serif"><font size="1"> <a href="mailto:diego.parrilla@stackops.com" target="_blank">diego.parrilla@stackops.com</a></font></font><span style="border-collapse:separate;font-family:Times;font-size:medium"><span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px"><font color="#004438" face="Arial"><b><b><span lang="EN-GB" style="font-size:10pt"></span></b></b></font></span></span><font face="Arial" size="2" style="font-family:arial,helvetica,sans-serif"><font size="1"> | </font></font><span style="border-collapse:separate;font-family:Times;font-size:medium"><span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px"><font face="Arial" size="2" style="font-family:arial,helvetica,sans-serif"><font size="1"><a href="tel:%2B34%20649%2094%2043%2029" value="+34649944329" target="_blank">+34 649 94 43 29</a> | <a>skype:diegoparrilla</a></font></font></span></span><font face="Arial" size="2" style="font-family:arial,helvetica,sans-serif"><a href="http://www.stackops.com/" target="_blank"><b><br>
</b></a></font></div></div><div style="font-size:13px"><font color="#004438" face="Arial"><b><p><span style="border-collapse:separate;font-size:medium;font-family:Times"><span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px"><span style="border-collapse:separate;font-family:Times;font-size:medium"><span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px"><font color="#004438" face="Arial"><b><b><span lang="EN-GB" style="font-size:10pt"><img src="http://stackops.s3-external-3.amazonaws.com/STACKOPSLOGO-ICON.png"></span></b></b></font></span></span></span></span></p>
</b></font></div></span></span><div><div class="h5"><div><br></div><br>
<br><br><div class="gmail_quote">On Fri, Sep 21, 2012 at 4:39 PM, Samuel Winchenbach <span dir="ltr"><<a href="mailto:swinchen@gmail.com" target="_blank">swinchen@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi All,<br>
<br>
What are some "best practices" when it comes to overselling RAM in a<br>
KVM based openstack setup? For example:<br>
<br>
I have 4 nodes with 16 cores & 128 GB RAM each. If on one of those<br>
nodes I oversell ram 2:1 (256 GB RAM) and the VMs actually use that<br>
much does it just start swapping out pages to disk?<br>
<br>
How do all of you handle overselling RAM?<br>
<br>
Thanks,<br>
Sam<br>
<br>
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</blockquote></div><br></div></div></div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>Joe Topjian<div>Systems Administrator</div><div>Cybera Inc.</div><div><br></div><div><a href="http://www.cybera.ca" target="_blank">www.cybera.ca</a></div>
<div><br></div><div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">Big data is coming to Canada. Join the welcome wagon.</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">
<b>Cyber Summit 2012</b></div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">October 1-3, Banff</div><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px;background-color:rgb(255,255,255)">
<a href="http://www.cybera.ca/summit2012" style="color:rgb(17,85,204)" target="_blank">www.cybera.ca/summit2012</a></div></div><div><br></div><div><font color="#666666"><span>Cybera</span><span> is a not-for-profit organization that works to spur and support innovation, for the economic benefit of Alberta, through the use of cyberinfrastructure.</span></font></div>
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