Re: [Xen-users] How to set up a domU to run on multiple dom0s

[Robin Axelsson <gu99roax@xxxxxxxxxxxxxxxxxxx>]

I want to run a multithreaded Windows binary while distributing the
threads over several computers on a local network. Since the binary in
itself (mplus) has no support for distributed computing, I was hoping it
would be possible to distribute the the computational threads over the
network through a virtual layer.

I cannot see how such a windows binary could be 'tricked' into running
over two separate VMs, unless Windows provides some kind of
functionality that would allow threads and sub-threads to be redirected
to other computers in a network.

I thought this is what cloud computing was intended for. What happened
to eucaluptus, enomaly or even cloudfoundry?

Robin.

Ian Campbell skrev 2014-02-10 14:51:
> On Mon, 2014-02-10 at 13:25 +0100, Robin Axelsson wrote:
>> I'm wondering if it is possible to set up one virtual machine to use
>> CPU/RAM resources located on several physical machines where some of
>> these resources are shared through protocols such as MPI.
>>
>> Say that I have 32 CPU cores on two separate physical machines so what
>> I'm essentially asking is whether it is possible to set these machines
>> up so that the operating system sees 64 computing cores in the virtual
>> machine / domU?
> No, I'm afraid it is not. Xen carves up individual hosts and can allow
> you to transfer a running VM on a very coarse time scale to another host
> but does not support running one VM across multiple hosts
> simultaneously.
>
> However I see no reason why whatever higher level tools which you would
> use on two non-virtualised physical hosts to provide some illusion of a
> single machine shouldn't work on two VMs hosted on different hosts (or
> even the same host for that matter).
>
> Ian.
>
> .
>


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