[Engine-devel] Question about Disk Hotplug

[Itamar Heim]

On 09/11/2013 04:51 PM, Roy Golan wrote:
> 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

we could have other "storage" things than disks?

>
>>
>>>
>>> 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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>>
>
>