On Sat, Jun 21, 2014 at 03:10:39AM +0100, Karanbir Singh wrote: > hi, > > I have just pushed a public build for a qcow2 image, this should be > suiteable for any HVM environment. Please test as widely as possible. > > http://buildlogs.centos.org/centos/7/cloud/ Is that built using the centos.sh script? As a general comment, although not required, virt-builder would prefer it if the image was xz-compressed. The reason is that it has to download the template and cache it in the user's $HOME, so a 960MB template is obviously both slow to download and takes a lot of space. NB: Don't bother with qcow2's internal compression feature. It's a waste of space. xz is where it's at. - nearly best in class compression - real API (liblzma) - preserves sparseness, important for raw format images - virt-builder has a custom multithreaded unxz [1] -- it is sysconf(_SC_NPROCESSORS_ONLN) times faster than unxz Rich. [1] https://github.com/libguestfs/libguestfs/blob/master/builder/pxzcat-c.c -- 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/