<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Huang:<div><br></div><div>You can use the simple scheduler, allocates new instances to hosts that have the fewest instances currently running.</div><div><br></div><div><font class="Apple-style-span" face="'Courier New'">--scheduler_driver=nova.scheduler.simple.SimpleScheduler</font><br><div><br></div><div>More sophisticated schedulers are currently under active development, but they haven't made it to the trunk yet.</div><div><br></div><div>Take care,</div><div><br></div><div>Lorin<br><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><span class="Apple-style-span" style="font-size: 12px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>--</div><div>Lorin Hochstein, Computer Scientist</div><div>USC Information Sciences Institute<br></div><div>703.812.3710</div><div><a href="http://www.east.isi.edu/~lorin">http://www.east.isi.edu/~lorin</a></div></div></span></div></span></div></span></div></div></span></span>
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<br><div><div>On May 23, 2011, at 10:00 PM, Huang Zhiteng wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Hi all,</div><div><br></div><div>In my setup of Cactus, I found Nova scheduler would place newly created instance to a compute node that is already full occupied (in terms of memory or # of virtual processors), which lead to swapping and VP overcommitting. That would cause serious performance issue on a busy environment. So I was wondering if there's some kinda mechanism to limit to resource one compute node could use, something like the 'weight' in OpenNebula. </div>
<div><br></div>I'm using Cactus (with GridDynamic's RHEL package), default scheduler policy, one zone only.<div><br></div><div>Any suggestion?</div><div>-- <br>Regards<br>Huang Zhiteng<br>
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