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Re: [Libvir] Network blocking issue



On Mon, Sep 17, 2007 at 08:51:26PM +0100, Daniel P. Berrange wrote:
> On Mon, Sep 17, 2007 at 03:35:19PM -0400, Daniel Veillard wrote:
> >   Expectations will vary according to environments. But 15mn is *way* over
> > what I would accept in a distributed system environment. On the other hand
> > when ssh resumes the connection fine if I suspend my laptop for 30mn is
> > a a feature. That's why I ask for a way to set the timeout, I don't think 
> > we will be able to find a value which will please everybody.
> 
> I'm not in favour of providing a configurable timeout to individual apps using
> libvirt because it'll lead to inconsistent behaviour between apps/ ie scenarios
> where one libvirt app will continue to work while another will prematurely
> fail. It'll also mean that every app using libvirt will have to find a way
> to expose this setting to the user.
> 
> >   I'm not too fond of using an extension to the URI, I think this gets over
> > what URI were designed for. Either giving an access to the socket descriptor
> > (beware this may generate a future Windows portability problem), or provide
> > a specific tuning API (not nice but relatively safe). Since calls are
> > synchronous the app may change the Connection timeout before issuing some
> > calls like Create or Migrate.
> 
> Yep, a timeout isn't really part of an address which is what we're using
> URIs for. Exposing new APIs for this to the apps isn't nice because of the
> need for all apps to then expose it to the user as i mention above.
> 
> Other possibilities are a libvirt client side config file or environment
> variables but the latter isn't too nice.
> 
> I'd probably go for config file unless people have other ideas.

 Well a config file forces the same timeout for the whole duration of the
program and for every connection, I'm not sure it's the right thing to do
in this case.

Daniel

-- 
Red Hat Virtualization group http://redhat.com/virtualization/
Daniel Veillard      | virtualization library  http://libvirt.org/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
http://veillard.com/ | Rpmfind RPM search engine  http://rpmfind.net/


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