From vlaero at yahoo.com.au Sun Nov 2 20:22:56 2014 Content-Type: multipart/mixed; boundary="===============6584727985643239975==" MIME-Version: 1.0 From: Paul Jansen To: users at ovirt.org Subject: [ovirt-users] q35 machine support? Date: Sun, 02 Nov 2014 17:22:54 -0800 Message-ID: <1414977774.40763.YahooMailNeo@web160305.mail.bf1.yahoo.com> --===============6584727985643239975== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable ---360795340-209196801-1414977774=3D:40763 Content-Type: text/plain; charset=3Dutf-8 Content-Transfer-Encoding: quoted-printable =3D0A> > > After doing some more searching I came across these two pa= ge=3D s:=3D0A> > > http://www.ovirt.org/Cluster_emulation_modes=3D0A> > > http://= www.=3D ovirt.org/Features/Cluster_parameters_override=3D0A> > >=3D0A> > > It sound= s li=3D ke this may allow me to achieve what I've described above.=3D0A> > > From w= ha=3D t I can tell the 'emulated machine type' is tied to the ovirt cluster =3D0A= > =3D > > level - ie: 3.5.=3D0A> > >=3D0A> >=3D0A> > you can switch q35 with pc-1= .0 in =3D ClusterEmulatedMachines config value for =3D0A> > version 3.5=3D0A> Thanks = Paul=3D for asking and Roy for answering. I thought q35 would be the=3D0A> default= a=3D nyway the whole time ;)=3D0A> >=3D0A> > engine-config -s ClusterEmulated= Mach=3D ines=3D3D"q35,rhel6.5.0"=3D0A> >=3D0A> > then create a new cluster and add = that h=3D ost to it. once the host is up this =3D0A> > emulation mode should be set.= =3D0A=3D > >=3D0A> > in 3.6 you'd be able to choose an emulation mode per VM.=3D0A> = Paul=3D , since this is really useful would you mind to open an RFE in BZ=3D0A> and= p=3D ost the link here, so we can keep track of this feature?=3D0A=3D0AHi Daniel= .=3D0A=3D Sorry for the late reply on this.=3D0AI'm happy that this feature is curren= tl=3D y documented in the wiki pages that I'd referenced above and is on the feat= =3D ure plan for 3.6.=3D0AThe workaround that was specified does what I need fo= r =3D now.=3D0AProper support in 3.6 will need to consider some other things, suc= h =3D as allowing attaching of disks to the sata interface on the q35 machine.=3D= 0A=3D 3.5s current workflow doesn't provide a way to cater for that. Perhaps all= =3D owing atachign 'virtio-scsi disks to this interface woudl work fine, but th= =3D en there's issue with the naming.=3D0AAdditionally, there have been issues = re=3D ported with live migration of machines that have the ICH9-AHCI controller e= =3D nabled.=3D0AAny RFE should handle these multifaceted issues - and others I'= m =3D not aware of - so given I don't understand all the ins and outs I'd prefer = =3D not to raise this.=3D0AI'd be interested to hear Sandro's take on how this = sh=3D ould likely proceed though. ---360795340-209196801-1414977774=3D:40763 Content-Type: text/html; charset=3Dutf-8 Content-Transfer-Encoding: quoted-printable

<SNIP>
> > > After doing some more searching I came across these = tw=3D o pages:
> > > http://www.ovirt.org/C= lust=3D er_emulation_modes
> > > http://www.o= virt=3D .org/Features/Cluster_parameters_override
>= >=3D ; >
> > > It sounds like this may = allo=3D w me to achieve what I've described above.
>= ; &g=3D t; > From what I can tell the 'emulated machine type' is tied to the ovi= =3D rt cluster
> > > level - ie: 3.5.> > >
> >= ;
> > you can switch q35 with pc-1.0 in ClusterE= mula=3D tedMachines config value for
> > version 3.5
> Thank= s Paul=3D for asking and Roy for answering. I thought q35 would be the
> default anyway the whole time ;)
=3D > >
> > engine-c= onfi=3D g -s ClusterEmulatedMachines=3D3D"q35,rhel6.5.0"
>=3D ; >
> > then create a new cluster and= add=3D that host to it. once the host is up this
&g= t; &=3D gt; emulation mode should be set.
> >> > in 3.6 you'd be able to choose an emulatio= n mo=3D de per VM.
> Paul, since this is really use= ful =3D would you mind to open an RFE in BZ
> and p= ost =3D the link here, so we can keep track of this feature?

Hi Daniel.
So= rry for =3D the late reply on this.
I'm happy that this feature is currently documented in the wiki pages that I'd= =3D referenced above and is on the feature plan for 3.6.
The workaround that was specified does what I need for now.
Proper support in 3.6 will need to consider some other= thi=3D ngs, such as allowing attaching of disks to the sata interface on the q35 m= =3D achine.
3.5s current workflow doesn't provide = a wa=3D y to cater for that. Perhaps allowing atachign 'virtio-scsi disks to = =3D this interface woudl work fine, but then there's issue with the naming.
Additionally, there have been issues reported wit= h li=3D ve migration of machines that have the ICH9-AHCI controller enabled.
Any RFE should handle these multifaceted issues - an= d ot=3D hers I'm not aware of - so given I don't understand all the ins and outs I'= =3D d prefer not to raise this.
I'd be interested = to h=3D ear Sandro's take on how this should likely proceed though.

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