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- W2508934009 abstract "Software fault-tolerant techniques require extensive process coordination when executed concurrently. Coordination is necessary to control the scope of process interaction, or to assess the extent of error propagation. It can be done synchronously as in the Conversation scheme, or asynchronously as in the Chase protocol. Process coordination becomes complicated in a loosely coupled distributed system because there is no shared memory and it is difficult to obtain an up-to-date global system state. This thesis studies error recovery protocols that supports distributed software fault-tolerance, with emphasis on their synchronization and coordination aspects.We construct queueing models to study the synchronous approach under different execution environments. We study system throughput and utilization in the presence of communication delay and process failures, and investigate scalability of this approach as the number of processes increases. Our results indicate that the synchronization requirement remains a performance bottleneck even when message transmission is instantaneous and when the processes are fault-free. Implications of the analytical results to distributed transaction processing will also be discussed.For asynchronous approach, we examine the cause-effect relation between processes, and study the components of a recovery subsystem that monitors dynamic process dependencies and directs process recovery. We compare and contrast various design alternatives to implement these components, and propose efficient asynchronous recovery protocols based on the Receiver-initiated approach. The proposed protocols are evaluated via simulation studies. They are shown to have superior throughput performance while at the same time avoid the cascaded abort problem that plagues previously proposed schemes." @default.
- W2508934009 created "2016-09-16" @default.
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- W2508934009 date "1990-01-01" @default.
- W2508934009 modified "2023-09-24" @default.
- W2508934009 title "Process synchronization and coordination in error recovery protocols for distributed computing systems" @default.
- W2508934009 hasPublicationYear "1990" @default.
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