Re: [Qemu-devel] [PATCH 2/2] Documentation: Update image format information

[Stefan Hajnoczi <stefanha@redhat.com>]

On Wed, Nov 21, 2012 at 02:23:57PM +0100, Kevin Wolf wrote:
>  @item qed
> -Image format with support for backing files and compact image files (when your
> -filesystem or transport medium does not support holes).  Good performance due
> -to less metadata than the more featureful qcow2 format, especially with
> -cache=writethrough or cache=directsync.  Consider using qcow2 which will soon
> -have a similar optimization and is most actively developed.
> +Old QEMU image format. Left for compatibility.
> +
> +For new images, use qcow2 instead. You might want to consider using the
> +@code{lazy_refcounts=on} option to get a more QED-like behaviour.

The first sentence should be kept, it describes the general feature set
and scope of this image format.  I agree that the rest of the paragraph
can be dropped.

You could insert a statement saying that qcow2 is now preferred because
it is actively developed and offers advanced features and performance as
the very first sentence.

Stefan