[Engine-devel] Question about Disk Hotplug
by Gustavo Frederico Temple Pedrosa
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Hi everyone,
We proposed some changes in how to query if an operating system supports ho=
tplug, then Itamar suggested that disk hotplugging and NIC hotplugging coul=
d be separated from each other. While it is pretty clear how to put info ab=
out NIC hotplugging in the osinfo, here are a few issues when trying to int=
roduce 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 suppor=
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 =3D VirtIO_SCSI, VirtIO
Thanks,
Leonardo Bianconi/Vitor de Lima/Gustavo Pedrosa
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<p class=3D"MsoNormal"><span lang=3D"EN-US">Hi everyone,<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">We proposed some changes in how=
to query if an operating system supports hotplug, then Itamar suggested th=
at 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 tryin=
g to introduce the same concept for disk hotplugging.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Some disk interfaces do not sup=
port 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.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">So, how do you propose a syntax=
to cover all these cases?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I thought about something along=
the lines of:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">os.{id}.devices.disk.hotpluggab=
leInterfaces =3D VirtIO_SCSI, VirtIO<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><o:p> </o:p></span></p>
<p class=3D"MsoNormal">Thanks,<o:p></o:p></p>
<p class=3D"MsoNormal">Leonardo Bianconi/Vitor de Lima/Gustavo Pedrosa<o:p>=
</o:p></p>
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