[ovirt-users] change Memory Ballooning setting

[Nelson Lameiras]

great, thanks very much 

cordialement, regards, 


	Nelson LAMEIRAS 
Ingénieur Systèmes et Réseaux / Systems and Networks engineer 
Tel: +33 5 32 09 09 70 
nelson.lameiras at lyra-network.com 

www.lyra-network.com | www.payzen.eu 

	
	
	

Lyra Network, 109 rue de l'innovation, 31670 Labège, FRANCE 



From: "Michal Skrivanek" <mskrivan at redhat.com> 
To: "Nelson Lameiras" <nelson.lameiras at lyra-network.com> 
Cc: "ovirt users" <users at ovirt.org> 
Sent: Friday, April 28, 2017 6:46:29 PM 
Subject: Re: [ovirt-users] change Memory Ballooning setting 



On 27 Apr 2017, at 16:29, Nelson Lameiras < nelson.lameiras at lyra-network.com > wrote: 




Hello oVirt gurus, 

When activating/deactivating memory balloning on VM, this will change /usr/libexec/qemu-kvm command line on host on vm startup (you can see it using "ps aux"). 
So I understand a vm reboot is needed to take this change into account. 



Right. That option controls the presence of the virtio-balloon device which is not hotpluggable 


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But when activating/deactivating memory balloning on Cluster (plus MoM Sync on host) I do not really understand what happens "under the hood" 

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This controls the actual behavior, inflating and deflating of those balloons. That can be done in runtime as it is external to the VM, managed by MOM demon. 


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- Is there a mechanism on host which controls "memory balloning" globally? 
- Is it able to change it's behaviour "on the fly" with "MoM Sync" ? 

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Yes. You can change the policy/behavior. 

HTH, 
michal 


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If you have any information, it would be greatly appreciated 

cordialement, regards, 

<element-signature_logo_lyra_115x94.jpg> 
	Nelson LAMEIRAS 
Ingénieur Systèmes et Réseaux / Systems and Networks engineer 
Tel: +33 5 32 09 09 70 
nelson.lameiras at lyra-network.com 

www.lyra-network.com | www.payzen.eu 
<element-signature_logo_YouTube_32x28.jpg> 
	<element-signature_logo_LinkedIn_41x28.jpg> 
	<element-signature_logo_Twitter_42x28.jpg> 
	<element-signature_payzen_61x28.jpg> 

Lyra Network, 109 rue de l'innovation, 31670 Labège, FRANCE 


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