Hi, The change in cpu overcommit factor will not change the amount of resource that are available to you. It will change the way you want to use the free resource available at that time. It won’t change what was already allocated.
for example if you have deployed the VMs with overcommit say 2 and after a while you change the overcommit to 3, the used resource will be scaled based on the change. changing the overcommit cannot create resource. It can only change the way you want to use the free resource. So now after the change in overcommit you can deploy 3 times more VMs (of a given service offering) than usual using the the resource that is free at the time of changing the overcommit value. The perviously allocated resource cannot be freed until you restart the VMs. This link will tell you how resource allocation calculations are made. https://cwiki.apache.org/confluence/display/CLOUDSTACK/CPU+and+RAM+Overcommit Thanks, Bharat. On 21-Apr-2015, at 11:20 pm, Rafael Weingärtner <rafaelweingart...@gmail.com<mailto:rafaelweingart...@gmail.com>> wrote: I have not looked at the code, but that seems odd. Restarting VMs instances to update the resource usage/resource availability when changing the overprovisioning factor. On Tue, Apr 21, 2015 at 12:51 PM, S. Brüseke - proIO GmbH < s.brues...@proio.com<mailto:s.brues...@proio.com>> wrote: Please try to stop and start the vm. Maybe reboot is not working here. You should start to see more free CPU after the first vm. Mit freundlichen Grüßen / With kind regards, Swen Brüseke -----Ursprüngliche Nachricht----- Von: Ugo Vasi [mailto:ugo.v...@procne.it] Gesendet: Dienstag, 21. April 2015 16:40 An: users@cloudstack.apache.org<mailto:users@cloudstack.apache.org> Betreff: Re: AW: cpu overprovisioning Hi Swen, I try rebboting 2 vm but the amount of cpu MHz is not changed. Do I have to restart all vm before you see a change? Il 21/04/2015 16:16, S. Brüseke - proIO GmbH ha scritto: This is because the factor of overprovisioning is attached to the instance too! And this factor is only changing after rebooting the instance. So after a change of cpu.overprovisioning.factor you need to reboot all instances on this cluster which were running before this change was made. Mit freundlichen Grüßen / With kind regards, Swen Brüseke -----Ursprüngliche Nachricht----- Von: Ugo Vasi [mailto:ugo.v...@procne.it] Gesendet: Dienstag, 21. April 2015 16:06 An: users@cloudstack.apache.org<mailto:users@cloudstack.apache.org> Betreff: Re: cpu overprovisioning If I change the over-provisioning ratio in cluster-relative settings (infrastructure->cluser->cluster-name->settings) the dashboard show the sum of real GHz the overprovisioned amount of GHz (324GHz) as aspected, but after a while also the sum of Ghz is multiplied by the same factor making it unnecessary... Il 21/04/2015 15:26, Bharat Kumar ha scritto: In case of cloudstack, cpu capacity for host is total of cpus * no of Ghz * overporvisoning. total capacity = sum of capacities of individual hosts. Thanks, Bharat. On 21-Apr-2015, at 6:49 pm, Abhinandan Prateek < abhinandan.prat...@shapeblue.com<mailto:abhinandan.prat...@shapeblue.com>> wrote: Available CPU will be 3 times the actual CPU when over provisioned by 3. The UI not showing the over provisioned value seems like a bug. -abhi On 21-Apr-2015, at 6:34 pm, Ugo Vasi <ugo.v...@procne.it<mailto:ugo.v...@procne.it>> wrote: Hi all, we have a cluster of three machines with 16 CPU at 2.2GHz each and we have set a cpu-overprovizioning to 3. I would expect that the CPU system capacity of the dashboard appear with the sum of megahertz CPUs multiplied by three instead I get the real sum (108MHz). I do not understand if this overprovisioning allows me to allocate more MHz of real ones asthe documentation say since in reality the virtual machines occupy on average only 20% of the computing power. thanks in advance -- U g o V a s i <ugo.v...@procne.it<mailto:ugo.v...@procne.it>> P r o c n e s.r.l >) via Cotonificio 45 33010 Tavagnacco IT phone: +390432486523 fax: +390432486523 Le informazioni contenute in questo messaggio sono riservate e confidenziali ed è vietata la diffusione in qualunque modo eseguita. Qualora Lei non fosse la persona a cui il presente messaggio è destinato, La invitiamo ad eliminarlo e a non leggerlo, dandocene gentilmente comunicazione. Per qualsiasi informazione si prega di contattare supp...@procne.it<mailto:supp...@procne.it> . Rif. 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ShapeBlue is a registered trademark. -- U g o V a s i <ugo.v...@procne.it<mailto:ugo.v...@procne.it>> P r o c n e s.r.l >) via Cotonificio 45 33010 Tavagnacco IT phone: +390432486523 fax: +390432486523 Le informazioni contenute in questo messaggio sono riservate e confidenziali ed è vietata la diffusione in qualunque modo eseguita. Qualora Lei non fosse la persona a cui il presente messaggio è destinato, La invitiamo ad eliminarlo e a non leggerlo, dandocene gentilmente comunicazione. Per qualsiasi informazione si prega di contattare supp...@procne.it<mailto:supp...@procne.it> . Rif. D.L. 196/2003 - proIO GmbH - Geschäftsführer: Swen Brüseke Sitz der Gesellschaft: Frankfurt am Main USt-IdNr. DE 267 075 918 Registergericht: Frankfurt am Main - HRB 86239 Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser Mail sind nicht gestattet. This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. -- Rafael Weingärtner
