[Libguestfs] Why libguestfs guest exist exceptionally?

[Zhi Yong Wu]

On Mon, Sep 29, 2014 at 12:36 AM, Richard W.M. Jones <rjones at redhat.com> wrote:
> On Sun, Sep 28, 2014 at 11:43:17PM +0800, Zhi Yong Wu wrote:
>> Yeah, but why did it happen when i directly issue guest VM via above command?
>
> OK I see.  When libguestfs runs qemu-kvm, it sets up a TCP socket
> first [on RHEL 5 -- it works differently upstream].  Without the
> socket existing (and sending commands etc), the qemu-kvm command on
> its own won't work.
I got it, thanks.

By the way, i found that virt-xxx usually has very poor performance on
my box. e.g. virt-filesystems will return the result in 30s,
virt-resize will need 30 minutes to complete resizing one disk. Every
virt-xxx need to start one QEMU guest at first every time it is
issued, so this takes too long time to run. I am trying to find out
some ways to improve its perf.

>
> Rich.
>
> --
> Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
> Read my programming and virtualization blog: http://rwmj.wordpress.com
> virt-p2v converts physical machines to virtual machines.  Boot with a
> live CD or over the network (PXE) and turn machines into KVM guests.
> http://libguestfs.org/virt-v2v



-- 
Regards,

Zhi Yong Wu