[Engine-devel] Question about Disk Hotplug

[Roy Golan]

On Wed 11 Sep 2013 12:06:40 PM IDT, Itamar Heim wrote:
> On 09/11/2013 11:27 AM, Roy Golan wrote:
>> On Tue 10 Sep 2013 09:20:32 PM IDT, Gustavo Frederico Temple Pedrosa
>> wrote:
>>> Hi everyone,
>>>
>>> We proposed some changes in how to query if an operating system
>>> supports hotplug, then Itamar suggested that disk hotplugging and NIC
>>> hotplugging could be separated from each other. While it is pretty
>>> clear how to put info about NIC hotplugging in the osinfo, here are a
>>> few issues when trying to introduce the same concept for disk
>>> hotplugging.
>>>
>>> Some disk interfaces do not support hotplugging at all (like IDE),
>>> some of them support it in the x86_64, but not in the ppc64
>>> architecture (like the VirtIO blk) and others support it in both
>>> architectures (like VirtIO SCSI). There is also a ppc64 specific
>>> controller called SPAPR VSCSI, which supports it too.
>>>
>>> So, how do you propose a syntax to cover all these cases?
>>>
>>> I thought about something along the lines of:
>>>
>>> os.{id}.devices.disk.hotpluggableInterfaces = VirtIO_SCSI, VirtIO
>>>
>>> Thanks,
>>>
>>> Leonardo Bianconi/Vitor de Lima/Gustavo Pedrosa
>>>
>>
>> "storage" is a better term than "disk" so:
>
> why? this is about a vdisk, isn't it?
well a vnic and vdisk are the building blocks in the end. so either we 
use vnic vdisk etc or storage,network etc for all

>
>>
>> os.{id}.devices.storage...
>>
>>
>> maybe in the future we may expand the metadata model to hold devices and
>> hook it to an OS
>>
>> device.{id}....
>> os.{id}.devices={deviceId}
>>
>> just a thought, its unnecessary for now.
>>
>>
>>
>>
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>