Reliable communication in the presence of failures
ACM Transactions on Computer Systems (TOCS)
Exploiting virtual synchrony in distributed systems
SOSP '87 Proceedings of the eleventh ACM Symposium on Operating systems principles
Concurrency control in groupware systems
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
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Time, clocks, and the ordering of events in a distributed system
Communications of the ACM
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INFOCOM'96 Proceedings of the Fifteenth annual joint conference of the IEEE computer and communications societies conference on The conference on computer communications - Volume 3
A Context-Driven Framework for Distributed Collaboration
DS-RT '09 Proceedings of the 2009 13th IEEE/ACM International Symposium on Distributed Simulation and Real Time Applications
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In a distributed collaborative application, a key requirement is that all users see the same copy of a shared window object at any given point in time (WYSIWIS). In this paper, we study 'user-assisted causal ordering' of messages as the basis for achieving WYSIWIS. The approach requires specifying the synchronization constraints on accessing shared window objects in the form of an order in which messages need to be processed and object state updated. The specifications are made available to the window subsystem based on the user-level knowledge about the actions on objects and the current (shared) object state. In contrast with the current approaches employing transaction models, our approach allows flexibility in the programming of collaboration-style applications, and offers increased levels of concurrency.