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Astrolabe is a new kind of peer-to-peer system implementing a hierarchical distributed database abstraction. Although deigned for scalable management and data mining, the system can also support wide-area multicast and offers powerful aggregation mechanisms that permit applications to build customized virtual databases by extracting and summarizing data located throughout a large network. In contrast...
We consider the Group Membership Problem (GMP) in asynchronous systems. This problem consists of maintaining a list of processes belonging to the system, and updating it as processes join (are started) and leave (terminate or fail). Our investigations led to four independent properties that characterize instances of this problem. We closely examine three membership services, comparing the message...
New data-consistency models make it possible for cloud computing developers to replicate soft state without encountering the limitations associated with the CAP theorem.
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