[Engine-devel] SharedRawDisk feature detail

[Itamar Heim]

On 02/05/2012 03:40 PM, Oved Ourfalli wrote:
...

>>> 4. VM Pools
>>> VM Pools are always based (at least today) on templates, and
>>> templates
>>> have no shared disks.
>>> I'd just block attaching a shared disk to a VM which is part of a
>>> pool
>>> (unless there is a very interesting use case meriting this)
>> If there is no reason to attach shared disk to a VM from pool, maybe
>> its
>> also not that relevant to attach shared disk to stateless VM.
>> Miki?
>>
>
> I think there is such a use-case in clustered environments (DB cluster, for example), in which you have several disks that are not shared (OS, applications, etc.), and several disks that are shared (DB disks).
> In this case, in order to create this clustered environment, it will be nice if you create a template with the regular disks, create a pool from it, and attach all the VMs in the pool the shared DB disks.
> (It would be even nicer if the shared disk will be a part of the template, and when creating VMs from it they will have have a "link" to this shared disk - but I agree that it may be complex so maybe we should leave it aside for now).
>
> Thoughts?

that we can wait with an interesting enough use case before we pursue 
this and ignore it for simplification for now.