Hi, everyone. Recently, i read the paper "a simple total ordered broadcast protocol" and there are some problems i can not figure out. Hope anyone can help me... :P
The paper describes the Zab protocol as a 2 phase commit protocol when system is under broadcast mode. However some paper(Skeen 82, "A Quorum Based Commit Protocol") has mentioned if we want to extend an 2PC to adapt a quorum based commit protocol we must introduce a three phase commit protocol(In fact, i haven't quit understood this, :( ). However according Zab paper, this still can be done. Why and how to do this? Secondly, even Zookeeper can guarantee that status in different followers are consistent. However, this consistency only works among a quorum of followers that has acked the COMMIT. As the client can connect to any followers when perform reading action, so what happens if the client happens to connect with the follower that has not acked the COMMIT? I can not find the information in this paper... If i ask some naive question, Hope anybody can tell me where i can find the answer or some suggestions, thanks :) -- View this message in context: http://zookeeper-user.578899.n2.nabble.com/Problems-about-Zab-protocol-tp6290102p6290102.html Sent from the zookeeper-user mailing list archive at Nabble.com.
