[ovirt-devel] [oVirt 3.6 Localization Question #6] "cannot accommodate memory of VM's pinned virtual NUMA nodes within host's physical NUMA nodes."

[Doron Fediuck]

On 11/05/15 10:50, Yuko Katabami wrote:
> 
> On 05/11/2015 04:56 PM, Doron Fediuck wrote:
>>
>> On 11/05/15 09:20, Yuko Katabami wrote:
>>> Hi all,
>>>
>>> I have another question on a 3.6 string.
>>>
>>> *File:***AppErrors
>>> *Resource ID:***VAR__DETAIL__NOT_MEMORY_PINNED_NUMA
>>> *String:***$detailMessage cannot accommodate memory of VM's pinned
>>> virtual NUMA nodes within host's physical NUMA nodes.
>>> *Question:* I have a bit of difficulty clearly understanding this
>>> string. Particularly the part "memory of VM's pinned virtual NUMA nodes"
>>> Could anyone paraphrase this? (Could it possibly be "memory of VM's
>>> pinned to virtual NUMA noteds"?)
>>>
>>>
>>> Thank you,
>>>
>>> Yuko
>>>
>>>
>>>
>> Hi Yuko,
>> NUMA is splitting memory+cpu into smaller cells, where each cell has
>> cpu+ram. This is possible in real machines, and also inside the guest.
>>
>> The best performance is achieved when you make sure each virtual cell
>> (virtual node / vnode) is pinned to a physical cell (pnode).
>>
>> If the physical node is smaller than the vnode, or occupied with other
>> VMs, you will get this error.
>>
>> Doron
> Hi Doron,
> 
> Thank you very much for your explanation.
> I think I understand the concept now but I would like to double check
> with you -- can it be re-phrased as:
> 
> "cannot allocate memory to the VM's virtual NUMA nodes which is pinned
> to host's physical NUMA nodes."
> 
> (I also want to check accommodate vs allocate)
> 

Hi Yuko,
this is about node (cell) capacity, so we should try and keep it simple.

> 
> Kind regards,
> 
> Yuko
>