An effective method for optimistic message logging based on group communication links

This paper presents a new method to considerably reduce rollback propagation effect of the conventional optimistic message logging by utilizing positive features of reliable FIFO group communication links. To satisfy this goal, the proposed method forces group members to keep different receive sequence numbers (RSNs) of each same message to their group they assigned the message respectively in their volatile memories. As the degree of redundancy of RSNs increases, the possibility of local recovery of each crashed process may significantly be higher while raising failure-free overhead coming from log information synchronization.