[ovirt-users] Cannot run VM. Memory size exceeds supported limit for given cluster version.

[Omer Frenkel]

----- Original Message -----
> From: "Punit Dambiwal" <hypunit at gmail.com>
> To: "Martin Pavlík" <mpavlik at redhat.com>
> Cc: users at ovirt.org
> Sent: Tuesday, February 17, 2015 10:56:24 AM
> Subject: Re: [ovirt-users] Cannot run VM. Memory size exceeds supported limit for given cluster version.
> 
> Hi Martin,
> 
> Sorry....i am referring VM64BitMaxMemorySizeInMB....and creating ubuntu 14.04
> LTS 64 Bit...
> 

the problem is that if you choose any linux distribution (ubuntu/debian/sles..) 
in the 'OS' drop box for the vm (except ones specifically mentioned 64bit like freebsdx64/rhel_6x64..),
it will be considered as 32bit.. and thus the 32bit limit apply.
there is an open bug on that:
Bug 1133642 - [RFE] Change the default "Other OS" to be 64bit instead of 32, affecting the derived OSes like Ubuntu

you can work around it by:
1. select another 64bit os that is suitable for you, like freebsdx64
2. override the os-info file, adding your own 64 bit version os, or making existing one 64bit
here is how to do it:
http://www.ovirt.org/OS_info#value_overriding


let me know if it helps

> On Tue, Feb 17, 2015 at 3:31 PM, Martin Pavlík < mpavlik at redhat.com > wrote:
> 
> 
> Hi Punit,
> 
> one thing is confusing me. You refer to VM32BitMaxMemorySizeInMB, but you are
> working with 64bit VM/template. Shouldn’t it be VM64BitMaxMemorySizeInMB?
> Anyways both should allow for approx. 64GB of memory. If you create VM with
> 63GB (or closest lower amount) it works?
> 
> Could you provide relevant part of engine.log, vdsm.log, supervdsm.log and
> libvirt log? From the time when the error occurs?
> 
> M.
> 
> 
> > On 17 Feb 2015, at 03:00, Punit Dambiwal < hypunit at gmail.com > wrote:
> > 
> > Hi,
> > 
> > I am running Ovirt 3.5.1 and have the following settings in the engine
> > config for VM memory :-
> > 
> > -----------------
> > [root at ccr01 ~]# engine-config -g VM32BitMaxMemorySizeInMB
> > VM32BitMaxMemorySizeInMB: 65536 version: general
> > 
> > [root at ccr01 ~]# engine-config -g VM64BitMaxMemorySizeInMB
> > VM64BitMaxMemorySizeInMB: 524288 version: 3.0
> > VM64BitMaxMemorySizeInMB: 2097152 version: 3.1
> > VM64BitMaxMemorySizeInMB: 2097152 version: 3.2
> > VM64BitMaxMemorySizeInMB: 4096000 version: 3.4
> > VM64BitMaxMemorySizeInMB: 4096000 version: 3.5
> > VM64BitMaxMemorySizeInMB: 2097152 version: 3.3
> > [root at ccr01 ~]#
> > --------------------
> > 
> > When i create a guest VM more than 64GB memory,VM is failed to start with
> > following error:
> > 
> > "Cannot run VM. Memory size exceeds supported limit for given cluster
> > version."
> > 
> > Steps to Reproduce:
> > 1. Create new VM or edit existing VM Memory Size to "65536 MB" from Ovirt
> > GUI.
> > 2. Created the guest VM through template 64-bit... so it will support more
> > than 16 GB memory.
> > 3. Now, Start the VM.
> > 
> > Thanks,
> > Punit
> > 
> > 
> > 
> > 
> > 
> 
> 
> 
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