The authors in this paper propose an overlay based scheme to provide services like multicast, anycast and mobility. The main idea of the paper involves sending a packet with an identifier and the receivers set triggers for receiving packets associated with an identifier.
I liked this scheme because it is neat and simple. The sender has to communicate with the intermediary and not with all the interested receivers of the packet. This aids in decoupling the act of sending from receiving.
This scheme relies heavily on the performance of the overlay. The overlay used should be: Robust, Scalable, Efficient and Stable. The authors choose Chord and say that it satisfies all the requirements.
I really like the concept for its simplicity but few things that concern me are:
1. What happens when a chord node goes down? This involves copying the triggers registered with the failed node to another node. This requires a robust replication and that will make the system more complicated.
2. Efficiency of this system is less because we have introduced indirection.
3. How is revocation of triggers handled neatly?
I liked this scheme because it is neat and simple. The sender has to communicate with the intermediary and not with all the interested receivers of the packet. This aids in decoupling the act of sending from receiving.
This scheme relies heavily on the performance of the overlay. The overlay used should be: Robust, Scalable, Efficient and Stable. The authors choose Chord and say that it satisfies all the requirements.
I really like the concept for its simplicity but few things that concern me are:
1. What happens when a chord node goes down? This involves copying the triggers registered with the failed node to another node. This requires a robust replication and that will make the system more complicated.
2. Efficiency of this system is less because we have introduced indirection.
3. How is revocation of triggers handled neatly?
1 comment:
I agree with your analysis: the mechanism is attractive, but there are many failure modes/implementation issues not fully addressed in the paper that need to be considered for the thing to work.
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