From gustavo.pedrosa at eldorado.org.br Tue Sep 10 14:20:42 2013 Content-Type: multipart/mixed; boundary="===============4156086464054408276==" MIME-Version: 1.0 From: Gustavo Frederico Temple Pedrosa To: devel at ovirt.org Subject: [Engine-devel] Question about Disk Hotplug Date: Tue, 10 Sep 2013 18:20:32 +0000 Message-ID: --===============4156086464054408276== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable --_000_EF26FC1776F7FF46BFC072393EFD13A29A4FC8SERV070corpeldora_ Content-Type: text/plain; charset=3D"us-ascii" Content-Transfer-Encoding: quoted-printable Hi everyone, We proposed some changes in how to query if an operating system supports ho= =3D tplug, then Itamar suggested that disk hotplugging and NIC hotplugging coul= =3D d be separated from each other. While it is pretty clear how to put info ab= =3D out NIC hotplugging in the osinfo, here are a few issues when trying to int= =3D roduce the same concept for disk hotplugging. Some disk interfaces do not support hotplugging at all (like IDE), some of = =3D them support it in the x86_64, but not in the ppc64 architecture (like the = =3D VirtIO blk) and others support it in both architectures (like VirtIO SCSI).= =3D There is also a ppc64 specific controller called SPAPR VSCSI, which suppor= =3D ts 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 =3D3D VirtIO_SCSI, VirtIO Thanks, Leonardo Bianconi/Vitor de Lima/Gustavo Pedrosa --_000_EF26FC1776F7FF46BFC072393EFD13A29A4FC8SERV070corpeldora_ Content-Type: text/html; charset=3D"us-ascii" Content-Transfer-Encoding: quoted-printable

Hi everyone,<=3D /p>

We proposed some changes in= how=3D to query if an operating system supports hotplug, then Itamar suggested th= =3D at disk hotplugging and NIC hotplugging could be separated from each other.= =3D While it is pretty clear how to put info about NIC hotplugging in the osinfo, here are a few issues when tryin= =3D g to introduce the same concept for disk hotplugging.

Some disk interfaces do not= sup=3D port hotplugging at all (like IDE), some of them support it in the x86_64, = =3D but not in the ppc64 architecture (like the VirtIO blk) and others support = =3D it in both architectures (like VirtIO SCSI). There is also a ppc64 specific controller called SPAPR VSCSI, which= =3D supports it too.

So, how do you propose a sy= ntax=3D to cover all these cases?

I thought about something a= long=3D the lines of:

os.{id}.devices.disk.hotplu= ggab=3D leInterfaces =3D3D VirtIO_SCSI, VirtIO

Thanks,

Leonardo Bianconi/Vitor de Lima/Gustavo Pedrosa=3D

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