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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>The flag (of type list) you can use is “--least_cost_functions”<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Multiple algorithms can be specified, the default one is “compute_fill_first_cost_fn” which gives priority to the compute host (XenServer/ESX etc.) with more free RAM.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Sateesh<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'>----------------------------------------------------------------------------------------------------------------------------<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'>"This e-mail message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. Any unauthorized review, use, disclosure, or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message." </span><span style='font-size:8.0pt;font-family:"Verdana","sans-serif";color:black'><br><img width=1 height=1 id="Picture_x0020_1" src="cid:image001.gif@01CC9FD5.EC50CAF0" alt="Description: http://www6.integrityatwork.net/integrity/courses/ic1c/ic1cSTD/ic1cSTD_templates/shim.gif"><o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> openstack-bounces+sateesh.chodapuneedi=citrix.com@lists.launchpad.net [mailto:openstack-bounces+sateesh.chodapuneedi=citrix.com@lists.launchpad.net] <b>On Behalf Of </b>Razique Mahroua<br><b>Sent:</b> Thursday, November 10, 2011 4:12 PM<br><b>To:</b> Jorge Luiz Correa<br><b>Cc:</b> openstack@lists.launchpad.net<br><b>Subject:</b> Re: [Openstack] Four compute-node, everytime the 1st and 2nd are choosen<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>+1 :)<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:#13708A'>Razique Mahroua</span></b><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:#13708A'><a href="mailto:razique.mahroua@gmail.com">razique.mahroua@gmail.com</a></span><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'><br><img border=0 width=125 height=125 id="_x0036_a6167f8-01b7-4259-b676-723ab0700da5" src="cid:image002.jpg@01CC9FD5.EC50CAF0"></span><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Le 10 nov. 2011 à 11:27, Jorge Luiz Correa a écrit :<o:p></o:p></p></div><p class=MsoNormal><br><br><o:p></o:p></p><div><p class=MsoNormal>Is there a flag in nova.conf that permits we configure that? In documentation we can see that exists some algorithms used by scheduler. But, I don't know how to choose that one best fit our requirements. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Thanks!<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>:)<o:p></o:p></p><div><p class=MsoNormal>On Wed, Nov 9, 2011 at 1:36 PM, Ed Leafe <<a href="mailto:ed.leafe@rackspace.com">ed.leafe@rackspace.com</a>> wrote:<o:p></o:p></p><p class=MsoNormal>On Nov 9, 2011, at 7:51 AM, Razique Mahroua wrote:<br><br>> I use the default scheduler, in fact, I've never tunned it really.<br>> The hypervisors all run KVM<br><br> This is where the flag is defined in <a href="http://nova.scheduler.least_cost.py/" target="_blank">nova.scheduler.least_cost.py</a>:<br><br> 32 FLAGS = flags.FLAGS<br> 33 flags.DEFINE_list('least_cost_functions',<br> 34 ['nova.scheduler.least_cost.compute_fill_first_cost_fn'],<br> 35 'Which cost functions the LeastCostScheduler should use.')<br><br> Since the default weighting function is 'compute_fill_first_cost_fn', which, as its name suggests, chooses hosts so as to fill up one host as much as possible before selecting another, the pattern you're seeing is expected. If you change that flag to 'nova.scheduler.noop_cost_fn', you should see the hosts selected randomly. The idea is that you can create your own weighting functions that will select potential hosts in a way that best fits your needs.<br><span style='color:#888888'><br><br><span class=hoenzb>-- Ed Leafe</span></span><o:p></o:p></p><div><div><p class=MsoNormal><br><br>_______________________________________________<br>Mailing list: <a href="https://launchpad.net/~openstack" target="_blank">https://launchpad.net/~openstack</a><br>Post to : <a href="mailto:openstack@lists.launchpad.net">openstack@lists.launchpad.net</a><br>Unsubscribe : <a href="https://launchpad.net/~openstack" target="_blank">https://launchpad.net/~openstack</a><br>More help : <a href="https://help.launchpad.net/ListHelp" target="_blank">https://help.launchpad.net/ListHelp</a><o:p></o:p></p></div></div></div><p class=MsoNormal><br><br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>-- <br>- MSc. Correa, J.L.<o:p></o:p></p></div><p class=MsoNormal>_______________________________________________<br>Mailing list: <a href="https://launchpad.net/~openstack">https://launchpad.net/~openstack</a><br>Post to : <a href="mailto:openstack@lists.launchpad.net">openstack@lists.launchpad.net</a><br>Unsubscribe : <a href="https://launchpad.net/~openstack">https://launchpad.net/~openstack</a><br>More help : <a href="https://help.launchpad.net/ListHelp">https://help.launchpad.net/ListHelp</a><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>