Intel RSD Limits

[Flint WALRUS]

Ok, so, don't bother with my latest reply around Intel RSD, I finally found
out a complete specification document regarding RSD 2.1 Platform.
Indeed, RSD is far more complex that I envisioned at a first glance.

For those looking for more informations regarding how is working RSD under
the hood, here is the official documentation from intel:

https://www.intel.com/content/dam/www/public/us/en/documents/guides/platform-hardware-design-guide-v2-1.pdf

Le lun. 16 oct. 2017 à 23:50, Flint WALRUS <gael.therond at gmail.com> a
écrit :

> Hi Andres, thanks for taking times to answer my questions.
>
> Regarding the limitations, I was looking for intel documentation indeed,
> not the maas one as I assumed that maas didn’t hardcoded anyone.
> So, if you’ve got some links to share I’m all in :-)
>
> About my question regarding the ressources aggregates.
> I didn’t get it. How is this supposed to work? Does RSD systems are
> provided with a specific OS/hypervisor dedicated to create VM that can be
> hosted on two different hosts but still be seen as a unique ressources
> within the guest OS? Is that using MPI under the hood?
> How can I create a node that will address ressources across multiple
> physical machines?
>
> Thank a lot again!
> Le lun. 16 oct. 2017 à 23:25, Andres Rodriguez <
> andres.rodriguez at canonical.com> a écrit :
>
>> Hi Gael,
>>
>> The limitations of MAAS wrt Intel RSD support are given by RSD itself. As
>> of today, it is not yet possible to slice amount of CPU/RAM/Local storage a
>> machine inside Intel RSD, as this is basically on actual systems that are
>> part of Intel RSD itself.
>>
>> Further comments inline:
>>
>> On Tue, Oct 10, 2017 at 3:36 AM, Flint WALRUS <gael.therond at gmail.com>
>> wrote:
>>
>>> Hi guys, looking at the pods and so Intel RSD limitations but I hardly
>>> found documentation about it.
>>>
>>> So, what currently are the limitations? Is an aggregated machine limited
>>> by the amount of hardware that it can request?
>>>
>>> Imagine that I’ve got 4 RSD Servers equipped like:
>>>
>>> 4x socket Intel 16 Core CPU.
>>> 512 GB Ram.
>>> 56 TB SSD.
>>>
>>> Does it means that I can aggregate the 64 cores with 2TB RAM and 224 TB
>>> storage?
>>>
>>
>> Yes, that is correct, however, due to RSD limitations, once you request a
>> machine with 10 cores, 200GB RAM & 20 TB of storage disk, RSD will give you
>> one of the physical systems that at least match your request. In other
>> words, it will give you 1 of the 4 servers.
>>
>> Hope this answers your question!
>>
>>>
>>> If that’s correct how is that possible? Using a hypervisor with MPI
>>> capabilities  ?!
>>>
>>> If that’s incorrect what are the limits? Am I limited to the amount of
>>> resources that can provide a standalone node? If so, why would I use pods
>>> instead of classic BM with juju on top of maas being able to use lxd
>>> isolation for resources optimization ?
>>>
>>> Thanks a lot guys!
>>>
>>> --
>>> Maas-devel mailing list
>>> Maas-devel at lists.ubuntu.com
>>> Modify settings or unsubscribe at:
>>> https://lists.ubuntu.com/mailman/listinfo/maas-devel
>>>
>>>
>>
>>
>> --
>> Andres Rodriguez
>> Engineering Manager, MAAS
>> Canonical USA, Inc.
>>
>
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