[ofa-general] Re: multicast join failed for...

[Michael S. Tsirkin]

> Quoting Hal Rosenstock <halr at voltaire.com>:
> Subject: Re: multicast join failed for...
> 
> On Wed, 2007-04-11 at 14:12, Michael S. Tsirkin wrote:
> > > > If yes, I'm actually not too happy with this.
> > > > 
> > > > Would something like the following heuristic work better?
> > > > - select the max rate between all participants
> > > 
> > > The issue is that one doesn't know all the participants in a group as
> > > they are joined dynamically.
> > > 
> > > (I think we've been over this aspect on the list several times in the
> > > past.)
> > 
> > That's why I suggest the fix, so that the rate is adapted
> > dynamically.
> > 
> > > > - when a host with lower rate joins, destroy the group
> > > 
> > > I don't think a group can be destroyed like this "underneath" its
> > > existing members.
> > > 
> > 
> > Of course it can. That's what happens when SM is restarted.
> 
> Client reregistration ? I don't like using that big hammer as a solution
> to this. Seems a little harsh to me.

I think it's not too bad - previously we had some client failing join
which is worse. And we can still keep an option to limit the rate
manually.

> I'm not convinced it's even
> required either,

How do you mean? All end-points must know the rate is now lower.

-- 
MST