[Engine-devel] multi-domain types in one storagepool

[Itamar Heim]

On 12/19/2011 04:07 PM, Livnat Peer wrote:
> On 12/19/2011 02:08 PM, 杨焦 wrote:
>> Hi, all
>>
>> After taking a look at Ovirt-engine, I happen to notice that for one
>> DC(storage pool), only one type of data domain can be attached.  As
>> far as I know, from VDSM side, different data storages can be managed
>> by one storagepool.  So, why is there such limitation? is it possible
>> to remove such rule from front-end?
>>
>> Maybe there are some reasons I don't know support this rule, hope
>> someone can show me some light.
>>
>> thanks
>>
>> Joseph
>
> Hi Joseph,
>
> There is a limitation in VDSM today that prevents managing two different
> types of data domains in the same pool.
>
> There is a plan to move to SDM (Storage Domain Manager) instead of SPM
> (Storage Pool Manager) in the future and this limitation will disappear.

in addition, the work on attaching iscsi LUNs directly to VMs could 
allow you to use an NFS storage domain for managed disks, and map LUNs 
for iscsi (mapped LUNs need 1:1 LUN to virtual disk ratio).

doesn't fit all use cases obviously, but may cover your use case for the 
meanwhile.