Reading up on Reliable Multicast: PGM

As both the amount of data exchanged between applications and the number of applications grow, classic one-on-one unicast connections via TCP/IP no longer scale. Hence multicast protocols such as UDP are getting more and more into the mainstream, for instance as the basis of Eurex New Trading Architecture.

Unfortunately, multicasts are inherently unreliable (as opposed to TCP), so I became interested in reliable multicast as a means to get the best of both worlds. Here are a couple of (hopefully useful) links about reliable multicast in general and Pragmatic General Multicast (PGM) in particular.




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