On Wed, May 22, 2013 at 03:38:33PM -0400, Wolfgang Richter wrote: > On Wed, May 22, 2013 at 3:26 PM, Richard W.M. Jones <rjo...@redhat.com>wrote: > > > On Wed, May 22, 2013 at 02:32:37PM -0400, Wolfgang Richter wrote: > > > On Wed, May 22, 2013 at 12:42 PM, Richard W.M. Jones <rjo...@redhat.com > > >wrote: > > > > > > > Run up to two extra guestfish instances, with the same result. The > > > > fourth guestfish instance hangs at the 'run' command until one of the > > > > first three is told to exit. > > > > > > > > > And your interested on being notified when a snapshot is "safe" to read > > > from? > > > Or is it valuable to try reading immediately? > > > > I'm not sure I understand the question. > > > > I assumed (maybe wrongly) that if we had an NBD address (ie. Unix > > socket or IP:port) then we'd just connect to that and go. > > > I meant if there was interest in reading from a disk that isn't fully > synchronized > (yet) to the original disk (it might have old blocks). Or would you only > want to > connect once a (complete) snapshot is available (synchronized completely to > some point-in.
IIUC a disk which wasn't fully synchronized wouldn't necessarily be interpretable by libguestfs, so I guess we would need the complete snapshot. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://libguestfs.org
