[Nel] Suggestion for the NeL network library / architecture

Tue, 12 Dec 2000 11:48:18 +0100 (MET)

> That's where PGM/multicast intervenes. In that model, the agent, 
+when he
+> changes some of his variables, notifies the replica that "XYZ are 
+now...".
+> I spoke about how the world services organise where an agent 
+resides. In
+> some models, you have about one, maybe two replicas, which you can 
+notify
+> using a standard TCP stream. Or RDP. But, if you want a 
+load-balancing
+> system, you quickly end up with a replica of an object in most world
+> service processes. It becomes then more efficient to multicast the 
+updates
+> as above to all processes, and update them all in one sweep.
+
+Ok, I always have though of load balancing as load-work division 
+between servers.
+
+I think that the above kind of working can have several inconsistences 
+, just take a look to some distributed Mutual exclusion algos.
+
+Just imagine that both copies of a object multicast different 
+positions, you have to choose what is the best one, and whatever your 
+choose is, it will be wrong, and servers can't be wrong.
+
+Replycating work can be a real pain.
+And for what you have said multicast isn't a solution for end-users.
+
+I think that IPv6 will fix these things, by having a multicast in the 
+standart, isn't it?
+
+