[Engine-devel] Question about the attribute lunType (LUNs)

[Gustavo Frederico Temple Pedrosa]

> -----Original Message-----
> From: Itamar Heim [mailto:iheim at redhat.com]
> Sent: terça-feira, 30 de julho de 2013 11:15
> To: Gustavo Frederico Temple Pedrosa
> Cc: engine-devel at ovirt.org; Leonardo Bianconi; Vitor de Lima; Federico
> Simoncelli
> Subject: Re: [Engine-devel] Question about the attribute lunType (LUNs)
> 
> On 07/30/2013 05:13 PM, Gustavo Frederico Temple Pedrosa wrote:
> >> -----Original Message-----
> >> From: Itamar Heim [mailto:iheim at redhat.com]
> >> Sent: terça-feira, 30 de julho de 2013 07:12
> >> To: Gustavo Frederico Temple Pedrosa
> >> Cc: engine-devel at ovirt.org; Leonardo Bianconi
> >> Subject: Re: [Engine-devel] Question about the attribute lunType
> >> (LUNs)
> >>
> >> On 07/29/2013 09:06 PM, Gustavo Frederico Temple Pedrosa wrote:
> >>> Hello everyone,
> >>>
> >>> The QEMU/KVM on IBM POWER does not support iSCSI yet. This
> requires
> >>> the implementation of methods that evaluate if a Disk is a iSCSI LUN
> >>> or not, in order to avoid its use in this specific architecture.
> >>> Looks like this can be determined by the attribute lunType (which is
> >>> of the type StorageType, an Enum) of the class LUNs. But when I
> >>> retrieve the object, the attribute lunType has the value "UNKNOWN",
> >>> even if I've setted it with another value. In the class
> >>> LunDAODbFacadeImpl there is not a call to the "entity.setLunType"
> >> method.
> >>>
> >>> Does anyone know how to retrieve the attribute lunType? Is the
> >> "UNKNOW"
> >>> value a bug?
> >>>
> >>> Thanks,
> >>>
> >>> Leonardo Bianconi/Vitor de Lima/Gustavo Pedrosa
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> Engine-devel mailing list
> >>> Engine-devel at ovirt.org
> >>> http://lists.ovirt.org/mailman/listinfo/engine-devel
> >>>
> >>
> >> Gustavo - what are you trying to achieve exactly? not allowing iscsi
> >> storage domains for ppc, or direct lun type disks (or something else)?
> >>
> >> Thanks,
> >>      Itamar
> >
> >
> >
> > Hello Itamar,
> >
> > The QEMU/KVM on IBM POWER does not support direct LUN disks (i.e. -
> drive file=iscsi://ip_address/target/1), so this kind of device cannot be
> available on the frontend.
> >
> > Thanks,
> > Leonardo Bianconi/Vitor de Lima/Gustavo Pedrosa
> >
> 
> i could be wrong, but i'm pretty sure direct lun disks in ovirt are done by the
> host doing the iscsi connection, and mounting the disk as a regular block
> device to the guest?


Yes, you are correct. We tested and the VDSM does not pass LUNs directly to QEMU.