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Concurrency Control in Database Systems
Bangladesh Journal of Multidisciplinary Scientific Research, 2019 Concurrency control mechanisms including the wait, time-stamp and rollback mechanisms have been briefly discussed. The concepts of validation in optimistic approach are summarized in a detailed view. Various algorithms have been discussed regarding the degree of concurrency and classes of serializability.
Dardina Tasmere, Md. Nazmus Salehin
exaly +5 more sources
Flexible Concurrency Control for Legacy CAD to Construct Collaborative CAD Environment
Journal of Advanced Mechanical Design, Systems and Manufacturing, 2012 Collaborative CAD (Co-CAD) systems can be constructed based on either 3D kernel or legacy stand-alone CAD systems, which are typically commercial CAD systems such as CATIA, Pro/E and so on.
Xiantao Cai, Fazhi He, Soonhung Han
exaly +4 more sources
Adaptive Tip Selection for DAG-Shard-Based Federated Learning with High Concurrency and Fairness [PDF]
SensorsTo cope with the challenges posed by high-concurrency training tasks involving large models and big data, Directed Acyclic Graph (DAG) and shard were proposed as alternatives to blockchain-based federated learning, aiming to enhance training concurrency.
Ruiqi Xiao, Yun Cao, Bin Xia
doaj +2 more sources
Composing concurrency control [PDF]
Proceedings of the 36th ACM SIGPLAN Conference on Programming Language Design and Implementation, 2015 Concurrency control poses significant challenges when composing computations over multiple data-structures (objects) with different concurrency-control implementations. We formalize the usually desired requirements (serializability, abort-safety, deadlock-safety, and opacity) as well as stronger versions of these properties that enable composition.
Ofri Ziv +4 more
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An optimized deterministic concurrency control approach for geo-distributed transaction processing on permissioned blockchains [PDF]
Scientific ReportsConcurrency control is crucial for ensuring consistency and isolation in distributed transaction processing. Traditional concurrency control algorithms, such as locking-based protocols, usually suffer from performance degradation due to heavy transaction
Zhibo Han +6 more
doaj +2 more sources
Syntactic control of concurrency [PDF]
Theoretical Computer Science, 2005 AbstractWe consider a finitary procedural programming language (finite data-types, no recursion) extended with parallel composition and binary semaphores. Having first shown that may-equivalence of second-order open terms is undecidable we set out to find a framework in which decidability can be regained with minimum loss of expressivity.
Dan R. Ghica +2 more
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Concurrency control for adaptive indexing [PDF]
Proceedings of the VLDB Endowment, 2012 Adaptive indexing initializes and optimizes indexes incrementally, as a side effect of query processing. The goal is to achieve the benefits of indexes while hiding or minimizing the costs of index creation. However, index-optimizing side effects seem to turn read-only queries into update transactions that might, for example, create lock contention.
Graefe, G. +4 more
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Solution of a problem in concurrent programming control [PDF]
Communications of the ACM, 1965 A number of mainly independent sequential-cyclic processes with restricted means of communication with each other can be made in such a way that at any moment one and only one of them is engaged in the “critical section” of its cycle.
E. Dijkstra
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On Optimistic Methods For Concurrency Control [PDF]
Fifth International Conference on Very Large Data Bases, 1979., 1979 Most current approaches to concurrency control in database systems rely on locking of data objects as a control mechanism. In this paper, two families of nonlocking concurrency controls are presented. The methods used are “optimistic” in the sense that they rely mainly on transaction backup as a control mechanism, “hoping” that conflicts between ...
J.T. Robinson, H.T. King
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Visualizing Concurrency Control Algorithms for Real-Time Database Systems
Data Science Journal, 2008 This paper describes an approach to visualizing concurrency control (CC) algorithms for real-time database systems (RTDBs). This approach is based on the principle of software visualization, which has been applied in related fields.
Olusegun Folorunso +2 more
doaj +3 more sources