On Mon, Sep 29, 2014 at 12:55:04AM +0800, Zhi Yong Wu wrote: > On Mon, Sep 29, 2014 at 12:36 AM, Richard W.M. Jones <rjo...@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.
A good place to start is: http://libguestfs.org/guestfs-performance.1.html Are you running this inside a VM? Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://people.redhat.com/~rjones/virt-df/ _______________________________________________ Libguestfs mailing list Libguestfs@redhat.com https://www.redhat.com/mailman/listinfo/libguestfs