Virtualization and HotPlugging/swapping

[Oliver Falk]

Just fyi...

I use Fedora 14 with some VMs on VMWare here and CPU hotplug (add and 
remove) works. I have not tested it with memory yet, but I'm quite sure 
it will work - at least adding memory...

-of

On 01/20/2011 08:53 PM, Renich Bon Ciric wrote:
> Hello guys!
>
> I'm in direct contact with the guys @ CloudSigma.
>
> I've asked them to support CPU, RAM and HDD hot swapping and they say
> their system is capable of this but that linux (particularly, Fedora)
> isn't.
>
> They agree to do some testing on the subject but, honestly, I don't
> consider myself to be sufficiently knowledgeable to lead this.
>
> Is there anybody here interested on this?
>
> Anyway, their lead dev told them this:
>
> "Libvirt doesn't do any of this stuff itself (hot swapping). What it
> does include is
> an ability to use the virtio balloon driver. This essentially allows you to
> give a guest a large amount of ram, with it then voluntarily lending some of
> that memory back to the system. It requires a degree of cooperation and
> trust between host and guest that isn't appropriate (or easy to bill) in a
> public cloud, but it's a useful hack on private VM deployments in the
> absence of proper memory hotswap in qemu-kvm."
>
> I've read some stuff here:
> http://www.linux-kvm.org/page/CPUHotPlug
>
>
> It's hard to be free... but I love to struggle. Love isn't asked for;
> it's just given. Respect isn't asked for; it's earned!
> Renich Bon Ciric
>
> http://www.woralelandia.com/
> http://www.introbella.com/
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