[pve-devel] CPU and Memory hot add

[Alexandre DERUMIER]

>>ok so you addd maxcpus: 128 to each configto have it silently enabled? 

Yes ;)

Just be carefull to set only 1 socket, as hotplug is core by core

(I have also send pve-manager patches in the mailing, but dietmar don't have apply them yet)

>>How? set in config balooning to min and max to 4096 and then changing it 
>>to 8192 for min max does not change anything in the guest. 

Set max to maximum "hotpluggable" memory
set min to current guest memory
set shares = 0 (that disable auto ballonning from pvestatd)

Then play with min memory up/down 


----- Mail original ----- 

De: "Stefan Priebe" <s.priebe at profihost.ag> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Samedi 15 Février 2014 17:09:39 
Objet: Re: [pve-devel] CPU and Memory hot add 

Am 15.02.2014 13:59, schrieb Alexandre DERUMIER: 
> cpu hot add is already implemented. (even in proxmox ;) 
> https://git.proxmox.com/?p=qemu-server.git;a=commit;h=838776ab650f0593b48c234070c1a189fdbd72c7 
> 
> cpu hot del is not yet implemented. (but they are some prelimary patches in the qemu mailing list) 

ok so you addd maxcpus: 128 to each configto have it silently enabled? 

> 
> memory hotplug is not yet implemented. (should be ok for next qemu 2.0 release I think) 
> 
> But maybe they are cheating, like I do : just use ballonning with a fixed size ? 

How? set in config balooning to min and max to 4096 and then changing it 
to 8192 for min max does not change anything in the guest. 

Stefan 


> 
> ----- Mail original ----- 
> 
> De: "Stefan Priebe" <s.priebe at profihost.ag> 
> À: pve-devel at pve.proxmox.com 
> Envoyé: Vendredi 14 Février 2014 21:18:47 
> Objet: [pve-devel] CPU and Memory hot add 
> 
> Hi, 
> 
> while browsing the web, i found profitbricks, which is active in germany 
> and the us (http://www.profitbricks.com/technical-info). 
> 
> They use KVM and offer memory and cpu hot add on the fly? Anybody an 
> idea how this works if kvm does not already support it? 
> 
> Greets, 
> Stefan 
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