Comparing simple dd bs=1M count=10000 on dom0 vs domU. Qemu driver is
achieving pretty much the same like dom0.
Thanks
--
Karel
On 7.9.2015 21:45, Pasi Kärkkäinen wrote:
On Mon, Sep 07, 2015 at 05:47:39PM +0200, Karel Hendrych wrote:
...
changing from: <driver name='file'/> to: <driver name='tap2'/> makes
the domain start without QEMU.
However I see much better performance with QEMU (close to dom0,
tested using simple dd writes) than with tap2 driver. Is that
expected?
How did you measure it? buffered or direct io?
-- Pasi
What's best practise to file based storage on latest CentOS6-xen
(Kernel 3.18.17, Xen 4.4.2-7)
Are there any guides around running QEMU on CentOS6-xen as non-root user?
Cheers
--
Karel
On 7.9.2015 17:42, Karel Hendrych wrote:
Hi, spot on!
On 6.9.2015 12:56, Pasi Kärkkäinen wrote:
On Sun, Sep 06, 2015 at 09:08:50AM +0200, Karel Hendrych wrote:
Hi, after migrating to libvirt/libxl according to:
Hi,
https://wiki.centos.org/HowTos/Xen/Xen4QuickStart/Xen4Libvirt
I've noticed that my Xen PV domains are being launched by
qemu-system-i386 running under root privileges.
I am wondering why is this? Previously no qemu process was used.
If qemu is needed for some reason, are there any guidelines for
non-root operation?
In general qemu is used for the following purposes:
- for certain domU disk backend types (image files), and/or if there's
no blktap driver in dom0 kernel.
- domU graphical console (PVFB) VNC server, if it's enabled for the domU.
--
Karel Hendrych
-- Pasi
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