[Libguestfs] [PATCH libnbd v2 6/6] examples: copy-libev.c: Add progress

[Nir Soffer]

On Fri, Apr 23, 2021 at 10:34 AM Richard W.M. Jones <rjones at redhat.com> wrote:
>
> On Fri, Apr 23, 2021 at 02:48:59AM +0300, Nir Soffer wrote:
> > On Fri, Apr 23, 2021 at 12:09 AM Richard W.M. Jones <rjones at redhat.com> wrote:
> > >
> > >
> > > I'm pretty relaxed about you making changes to this example as you
> > > wish, and althouh I didn't review them in detail it all looks good, so ACK.
> > >
> > > I wonder though if the example is now too complicated(!)  Perhaps it'd
> > > be good to add a second, very basic example using libev?
> >
> > This is certainly too complicated, because this example is also an experiment,
> > trying to implement the core of nbdcopy with libev.
> >
> > I can try to add a basic example, or maybe something like a tutorial
> > that adds functionality one step at a time?
>
> Could be a lot of work.  How about a simple example that does
> something like reads from the start to the end, dumping output to
> stdout, ignoring extents?

Dumping to stdout means we cannot do parallel requests, which means there
is no reason to use the async interface.

Another direction I'm interested in is http/nbd proxy.  Maybe something simple
that supports GET/PUT using the event loop to do parallel requests.

I think a real implementation will be something nginx nbd module, making nginx
a nbd reverse proxy.

Nir