S. Osada and H. Higaki (Japan)
In order to acheive fault-tolerant distributed systems, checkpoint-recovery has been researched and many protocols have been designed. A global checkpoint taken by the protocols have to be consistent. For conventional data communication networks, a global checkpoint is defined to be consistent if there is no inconsistent message in any communication channel. For multimedia communication networks, there are different requirements for time-constrained failure-free execution and large-size message transmissions where lost of a part of the message is acceptable. This paper proposes novel criteria, consistency and duplexity, for global checkpoints in multimedia communication networks.
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