On 02/23/2012 11:53 PM, Pankaj Rawat wrote:
Hi all
Can any one tell what is the default Vitio blk IO Buffer size
You'll probably get better response on the qemu lists, since virtio is
part of qemu.
And can we change it ? if yes how?
Libvirt does not currently expose anything to change this, other than
the fact that _if_ qemu supports a way to change it on the command line,
you can use <qemu:command> in your XML to add the extra arguments; or if
qemu supports it via a monitor command, you can use 'virsh
qemu-monitor-command' to change it at runtime. But again, I don't know
enough about the situation to know if qemu even exposes a
parameterizable block size for virtio, since no one has previously asked
for libvirt to start encoding it into its XML as a formal feature.
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Eric Blake eblake(a)redhat.com +1-919-301-3266
Libvirt virtualization library
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