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Optimistic Virtual Synchrony
Proceedings 19th IEEE Symposium on Reliable Distributed Systems SRDS-2000
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This paper presents a novel form of group communication, Optimistic Virtual Synchrony (OVS). ...
In order to implement Virtual Synchrony semantics, group communication systems typically impose blocking periods during which applications are not allowed to send messages. ...
Example Applications of Optimistic Virtual Synchrony In this section we present several di erent applications that bene t from Optimistic Virtual Synchrony. ...
doi:10.1109/reldi.2000.885391
dblp:conf/srds/SussmanKM00
fatcat:xhyelfdfk5httab7bnppdkoymq
Apollo - Optimistically Linear and Responsive SMR
[article]
2021
IACR Cryptology ePrint Archive
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When compared to existing works which use equivocation detection, we improve the optimistic commit latency when (f + 1)δ < 2∆. ...
Existing Byzantine fault-tolerant (BFT) state-machine replication (SMR) protocols in the standard (bounded) synchrony and weak synchrony models rely on equivocation detection to ensure safety. ...
In Apollo protocol, we look at views as proposals from an imaginary virtual leader (in the head), and a view change as changing this virtual leader. ...
dblp:journals/iacr/BhatBBKR21
fatcat:wnv5szoly5hhpbco5if6ihjbfy
Page 623 of The Journal of the Operational Research Society Vol. 55, Issue 6
[page]
2004
The Journal of the Operational Research Society
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A global
Table 1
R Roy and R Arunachalam—Parallel discrete event simulation algorithm 623
virtual time (GVT), the minimum of the virtual clocks of all LPs and the timestamps of all messages in transit, ...
. ~ A global synchroni-
zation function is used to choose, among all LPs, a set of
events that are safe to be processed, usually based on the notion of distances between LPs. ...
Page 165 of IEEE Transactions on Computers Vol. 52, Issue 2
[page]
2003
IEEE Transactions on Computers
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Marzullo, “Optimistic Virtual IEEE Int'l Symp. Reliable Distributed Systems,
35) Sussman, I. synchrony,” Proc. Oct. 2000.
36] D. Terry, M. Theimer, K. Petersen, A. Demers, M. ...
Support of Strong Consistency on Fog Applications
2019
Proceedings of the 6th Workshop on Principles and Practice of Consistency for Distributed Data - PaPoC '19
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This paper addresses how virtual synchrony, in particular a technique named Light-Weight Group (LWG), can help supporting strong consistency for mobile applications in the Fog Computing environment. ...
To achieve such goal, we rely on virtual synchrony [1] . Virtual synchrony organizes processes into groups. ...
To mitigate such problems some solutions have been proposed such as Gossip multicast [11] that loosens message delivery guarantees and optimistic virtual synchrony [18] which tries to improve the blocking ...
doi:10.1145/3301419.3323969
dblp:conf/eurosys/LimaMT19
fatcat:yujvhx56mjckpd3l2gse7eqvdq
A Dynamic Light-Weight Group Service
2000
Journal of Parallel and Distributed Computing
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Implementations of virtual synchrony usually require the use of failure detectors and failure recovery protocols. ...
The virtual synchrony model for group communication has proven to be a powerful paradigm for building distributed applications. ...
Virtual synchrony Informally, virtual synchrony p r o vides group membership information to each process in the form of views and guarantees that all processes that install two consecutive views deliver ...
doi:10.1006/jpdc.2000.1645
fatcat:3gmguev2eba4fg3yrerh4lcsty
Enhancing dependability of cooperative applications in partitionable environments
[chapter]
1996
Lecture Notes in Computer Science
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In the context of cooperative application semantics, our approach combines the correctness of the pessimistic, and the availability of the optimistic approaches for data management in partitionable environments ...
Some systems try to preserve the consistency properties of virtual synchrony at low level, across partitions. This is the case with the work on extended virtual synchrony [18] . ...
A particular combination of the two services implements what is usually known as Virtual Synchrony (VS) [6] . ...
doi:10.1007/3-540-61772-8_47
fatcat:o2eg5facpbfwrjycfyoagkhgv4
Design and Implementation of Dynamic Load Balancing Algorithms for Rollback Reduction in Optimistic PDES
1999
VLSI design (Print)
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In an optimistic parallel simulation, logical processes (Ips) proceed with their computation without any constraints. ...
In this paper, we propose two algorithms for dynamic load balancing which reduce the number of rollbacks in an optimistic PDES system. ...
Therefore, it is desirable to keep the local clocks of all the lps in synchrony, which motivates this paper. ...
doi:10.1155/1999/64750
fatcat:cfgp6huh2jfrxdog6jlo6vlz7m
Group communication specifications: a comprehensive study
2001
ACM Computing Surveys
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The virtual synchrony property should not be confused with the strong, weak, optimistic and extended virtual synchrony models, although all of these models include this property. ...
The Weak Virtual Synchrony and Op- timistic Virtual Synchrony models. ...
doi:10.1145/503112.503113
fatcat:aewgj3lqdrh7ncweocwddtothq
Effective Cooperative Haptic Interaction over the Internet
2007
2007 IEEE Virtual Reality Conference
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We compare the effects of latency on synchrony between peers over the Internet with a low latency (0.5ms) local area network. ...
We propose a technique for maintaining synchrony between simulations in a peer-topeer system, while providing responsive direct manipulation for all users. ...
Synchrony between globally correct representations is maintained through event ordering using a consistent global time co-ordinate frame, while local responsiveness is achieved through an optimistic simulation ...
doi:10.1109/vr.2007.352471
dblp:conf/vr/GlencrossJFKWH07
fatcat:gddze3w3qfbozcsorq4p23ly3y
Page 42 of Contemporary Psychology Vol. 47, Issue 1
[page]
2002
Contemporary Psychology
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Of course, these assumptions are almost always found to be too optimistic. ...
visual display cannot be updated as responsively by the computer, it may be best for accurate kinesthetic effects to avoid motion sickness by modulating both motion platform and visual display to be in synchrony ...
Recovery Protocols for Replicated Databases--A Survey
2007
21st International Conference on Advanced Information Networking and Applications Workshops (AINAW'07)
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These protocols use a GCS providing virtual synchrony. ...
EVS provides simpler algorithms in regard to virtual synchrony. ...
doi:10.1109/ainaw.2007.306
dblp:conf/aina/Garcia-MunozADM07
fatcat:cm4awxa4srdn5ciqd5tex7cwsy
A synchronization protocol for supporting peer-to-peer multiplayer online games in overlay networks
2008
Proceedings of the second international conference on Distributed event-based systems - DEBS '08
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for non-correlated events (i.e., events which do not represent competing actions in the virtual world). ...
Peers are kept synchronized thanks to an optimistic mechanism which is able to drop obsolete events (i.e., events that lose their importance as the game goes on) and to allow different processing orders ...
In our model, simulation time advances in synchrony with the wallclock time. ...
doi:10.1145/1385989.1386000
dblp:conf/debs/Ferretti08
fatcat:wwo6lew5ffftrck7af5xkloc2e
Uncertainty and Predictability: Can They Be Reconciled?
[chapter]
2003
Lecture Notes in Computer Science
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A feasible example of the above is depicted in the figure: wide-area Virtual Private Networks (VPN), constructed over ISDN or 3G-UMTS. ...
Alternatively, other approaches are more optimistic, assuming that the system has periods of determinism, alternating with uncertainty, and try to identify and successfully explore those (sometimes scarce ...
doi:10.1007/3-540-37795-6_20
fatcat:fltxsb3agncnlnrtr7z4j4jydu
Overview of the InterGroup Protocols
[chapter]
2001
Lecture Notes in Computer Science
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Instant messaging systems, shared remote visualization, shared virtual reality and collaborative remote control of instruments are just a few examples. ...
Moshe also separates the membership service from the virtual synchrony s e r v i c e . F or full virtual synchrony, an additional layer built on top of Moshe is necessary. ...
The membership service needs to support a reliable groupordered delivery service and a form of virtual synchrony 5 , 12] . ...
doi:10.1007/3-540-45545-0_40
fatcat:wfytemhjxjbr5peipclq5j6t6i
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