108,826 research outputs found
Consensus on Transaction Commit
The distributed transaction commit problem requires reaching agreement on
whether a transaction is committed or aborted. The classic Two-Phase Commit
protocol blocks if the coordinator fails. Fault-tolerant consensus algorithms
also reach agreement, but do not block whenever any majority of the processes
are working. Running a Paxos consensus algorithm on the commit/abort decision
of each participant yields a transaction commit protocol that uses 2F +1
coordinators and makes progress if at least F +1 of them are working. In the
fault-free case, this algorithm requires one extra message delay but has the
same stable-storage write delay as Two-Phase Commit. The classic Two-Phase
Commit algorithm is obtained as the special F = 0 case of the general Paxos
Commit algorithm.Comment: Original at
http://research.microsoft.com/research/pubs/view.aspx?tr_id=70
A Byzantine Fault Tolerant Distributed Commit Protocol
In this paper, we present a Byzantine fault tolerant distributed commit
protocol for transactions running over untrusted networks. The traditional
two-phase commit protocol is enhanced by replicating the coordinator and by
running a Byzantine agreement algorithm among the coordinator replicas. Our
protocol can tolerate Byzantine faults at the coordinator replicas and a subset
of malicious faults at the participants. A decision certificate, which includes
a set of registration records and a set of votes from participants, is used to
facilitate the coordinator replicas to reach a Byzantine agreement on the
outcome of each transaction. The certificate also limits the ways a faulty
replica can use towards non-atomic termination of transactions, or semantically
incorrect transaction outcomes.Comment: To appear in the proceedings of the 3rd IEEE International Symposium
on Dependable, Autonomic and Secure Computing, 200
Multi-Shot Distributed Transaction Commit
Atomic Commit Problem (ACP) is a single-shot agreement problem similar to consensus, meant to model the properties of transaction commit protocols in fault-prone distributed systems. We argue that ACP is too restrictive to capture the complexities of modern transactional data stores, where commit protocols are integrated with concurrency control, and their executions for different transactions are interdependent. As an alternative, we introduce Transaction Certification Service (TCS), a new formal problem that captures safety guarantees of multi-shot transaction commit protocols with integrated concurrency control. TCS is parameterized by a certification function that can be instantiated to support common isolation levels, such as serializability and snapshot isolation. We then derive a provably correct crash-resilient protocol for implementing TCS through successive refinement. Our protocol achieves a better time complexity than mainstream approaches that layer two-phase commit on top of Paxos-style replication
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An Optimization to the Two-Phase Commitment Protocol
The basic two-phase distributed commitment protocol as described in [3, pp. 381-382] can be optimized so that a subordinate update site drops its locks more promptly and makes one fewer log force per transaction. The optimization applies as well to the variations of two-phase commitment (i.e., hierarchical, presumed commit. and presumed abort) described in the same paper
Implementation of the two-phase commit protocol in Thor
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.Includes bibliographical references (leaves 41-42).by Andrew Kirmse.M.Eng
Performance evaluation of a prudent two-phase commit protocol
Studies a prudent two-phase commit protocol, which in the presence of failures does not abort a transaction carelessly. Thus system performance is improved
Coloured Petri Net Model of Two-Phase Commit Protocol With Multiple Participants
In this work the usage of Coloured Petri Net for modeling and simulation of Two Phase Commit protocol with multiple cohorts is presented. Brief overview of Coloured Petri Nets is introduced. Two-Phase Commit protocol is briefly described than introduced as Coloured Petri Net model. By initial marking adaptation a few scenarios for 2PC protocol are presented with the use of the reachability analysis.Розглянуто застосування розфарбовуваних мереж Петрі для побудови моделей та подальшої імітації двофазного протоколу підтвердження розподілених транзакцій - 2PC (Two-phase commit) з багатьма учасниками. Надано опис основних понять розфарбовуваних мереж Петрі, що використовуються, а також дії двофазного протоколу підтвердження транзакцій для більш ніж одного учасника. За допомогою відповідного вибору початкових розміток проаналізовано досяжні стани для різних ситуацій, які можуть виникнути в процесі реалізації розподілених транзакцій із застосуванням протоколу 2PC
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