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检索条件"任意字段=Proceedings International Symposium on Databases in Parallel and Distributed Systems"

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A resilient decentralized commit protocol

A resilient decentralized commit protocol

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international symposium on parallel Processing

作者： Shyan-Ming Yuan Department of Computer and Information Science National Chiao Tung University Taipei Taiwan

A decentralized commit protocol is proposed for distributed database systems. This protocol is based on the hypercube network topology and is (log/sub 2/N)-2 resilient to site failures, where N is the number of sites in the system. In addition, the number of messages sent among N sites is O(N log/sub 2//sup 2/N) which is only a factor of log/sub 2/N over the message complexity lower bound O(NlnN).< >

关键词： Protocols Delay Information science Hypercubes Network topology Database systems distributed databases Remuneration

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Modeling and optimization of complex database queries in a shared-nothing system

Modeling and optimization of complex database queries in a s...

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international symposium on parallel and distributed Processing (IPDPS)

作者： N. Duppel Institute of Parallel and Distributed High Performance Systems University of Stuttgart Stuttgart Germany

The author introduces queueing network models for the optimization of the concurrent evaluation of complex database queries, which occur e.g. in deductive query processing. The basic principle for the optimization is the reduction of response time by a better load distribution. If data access leads to a bottleneck on any CPU, response time may possibly be reduced by a preceding dynamic replication of one or more tables, whose accesses make up the bottleneck, to a disc managed by a lighter loaded CPU. For the comparison of alternative concurrent execution plans only queueing network models give quantitative results, which consider the contention on resources like CPU or disc.< >

关键词： Query processing Delay Cost function distributed databases Deductive databases Intelligent networks Software tools Application software Humans Inference mechanisms

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3rd international Conference on parallel Architectures and Languages Europe, PARLE 1991

3rd International Conference on Parallel Architectures and L...

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3rd international Conference on parallel Architectures and Languages Europe, PARLE 1991

ISBN: (纸本)9783540541516

The proceedings contain 54 papers. The special focus in this conference is on parallel Architectures and Languages Europe. The topics include: Indirect reference counting: A distributed garbage collection algorithm;periodic multiprocessor scheduling;embeddings of shuffle-like graphs in hypercubes;mapping uniform recurrences onto small size arrays;area complexity of multilective merging;deriving fully efficient systolic arrays by quasi-linear allocation functions;affine timings for systems of affine recurrence equations;on the computational complexity of optimal sorting network verification;managing a parallel heap efficiently;towards a single model of efficient computation in real parallel machines;parallel complexity in the design and analysis of concurrent systems;FORK: A high-level language for PRAMs;neural network-based decision making for large incomplete databases;an optical content-addressable parallel processor for fast searching and retrieving;towards an efficient hybrid dataflow architecture model;data flow implementation of generalized guarded commands;on the design of deadlock-free adaptive routing algorithms for multicomputers: Design methodologies;a toolkit for debugging parallel lisp programs;Neural computing and the GALATEA project;a novel high-speed memory organization for fine-grain multi-thread computing;evaluation of futurebus hierarchical caching;efficient global computations on a processor network with programmable logic;POMP or how to design a massively parallel machine with small developments;the function processor: An architecture for efficient execution of recursive functions;the G-line: A distributed processor for graph reduction.

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3rd international Conference on parallel Architectures and Languages Europe, PARLE 1991

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3rd international Conference on parallel Architectures and Languages Europe, PARLE 1991

ISBN: (纸本)9783540541523

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A distributed catalog for heterogeneous distributed database resources

A distributed catalog for heterogeneous distributed database...

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international Conference on parallel and distributed Information systems

作者： D.M. Choy P.G. Selinger IBM Almaden Research Center San Jose CA USA

To support a distributed, heterogeneous computing environment, an inter-system catalog protocol is needed so that remote resources can be located, used, and maintained with little human intervention. This paper describes a scalable catalog framework, which is an extension of previous work in a distributed relational DBMS research prototype called R*. This work builds on the R* concepts to accommodate heterogeneity, to handle partitioned and replicated data, to support non-DBMS resource managers, and to enhance catalog access performance and system extensibility.< >

关键词： distributed databases Resource management Access protocols distributed computing Multimedia databases Humans Database systems Object oriented databases Computer interfaces Physics computing

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Advances in Computing and Information -ICC! '91: international Conference on Computing and Information Ottawa, Canada, May 27-29, 1991 proceedings 3rd

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3rd international Conference on Computing and Information, ICCI 1991

作者： Dehne, Frank Fiala, Frantisek Koczkodaj, Waldemar W. School of Computer Science Carleton University OttawaK1S 5B6 Canada Department of Mathematics and Computer Science Laurentian University SudburyP3E 2C6 Canada

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6th international symposium on Methodologies for Intelligent systems, ISMIS 1991

6th International Symposium on Methodologies for Intelligent...

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6th international symposium on Methodologies for Intelligent systems, ISMIS 1991

ISBN: (纸本)9783540545637

The proceedings contain 63 papers. The special focus in this conference is on Methodologies for Intelligent systems. The topics include: User profiles for information retrieval;an approach to deriving object hierarchies from database schema and contents;multilevel interface to a distributed database system;efficient evaluation of linear recursions with function symbols in deductive databases;synthesizing efficient agents from partial programs;Knowledge extraction from databases: Design principles of the INLEN system;stable model semantics for probabilistic deductive databases;towards implementing valuation based systems with relational databases;on the representation of continuous causal relationships;a logic of relative desire (Preliminary report);process transition networks: A formal graphical knowledge representation tool;using normal deduction graphs in default reasoning;a model of information sharing for fault-tolerant flexible manufacturing systems;On interval-based temporal planning: An IQ strategy;percept conceptualizations and their knowledge representation schemes;combining time points and time intervals in a hybrid knowledge representation formalism;an analysis of property-flow view vs individual-flow view of inheritance;semantic extensions to text retrieval;updates with equality: Beyond the herbrand universe assumption;using genetic algorithms to improve the performance of classification rules produced by symbolic inductive methods;methodologies for data/knowledge/information engineering: Will the twain meet?;learning quantitative features in a symbolic environment;automatic acquisition of proper noun meanings;investigating the relationships between abduction and inverse resolution in propositional calculus;explanation-based learning helps acquire knowledge from natural language texts;hybrid pattern recognition system capable of self-modification;towards an adaptive information retrieval system;generation of classification rules;personal learning apprent

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parallel transitive closure computations using topological sort

Parallel transitive closure computations using topological s...

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international Conference on parallel and distributed Information systems

作者： K.A. Hua S.S. Hannenhalli Department of Computer Science University of Central Florida Orlando FL USA

Deals with parallel transitive closure computations. The sort-based approaches introduced sorts the tuples of the relation into topological order, and the sorted relation is then horizontally partitioned and distributed across several processing nodes of a message passing multiprocessor system. This data partitioning strategy allows the transitive closure computation of the local data fragments to be computed in parallel with no interprocessor communication. The construction of the final result then requires only a small number of joins. Extensive analytical results are included in the paper as well. They show that the proposed techniques leads to a speedup that is essentially linear with the number of processors. Its performance is significantly better than the recently published hashless parallel algorithm.< >

关键词： Concurrent computing parallel algorithms Relational databases Computer science Multiprocessing systems Database systems parallel processing Deductive databases File systems

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parallel and distributed algorithms for finite constraint satisfaction problems

Parallel and distributed algorithms for finite constraint sa...

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international symposium on parallel and distributed Processing (IPDPS)

作者： Ying Zhang A.K. Mackworth Department of Computer Science University of British Columbia Vancouver BC Canada Canadian Institute for Advanced Research Canada

The authors develop two new algorithms for solving a finite constraint satisfaction problem (FCSP) in parallel. In particular, they give a parallel algorithm for the EREW PRAM model and a distributed algorithm for networks of interconnected processors. If an FCSP can be represented by an acyclic constraint network of size n with width bounded by a constant then: the parallel algorithm takes O(log n) time using O(n) processors and there is a mapping of this problem to a distributed computing network of poly(n) processors which stabilizes in O(log n) time.< >

关键词： distributed algorithms Computer science parallel algorithms Phase change random access memory distributed computing Image databases Information retrieval Image retrieval

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Non-serializable executions in heterogeneous distributed database systems

Non-serializable executions in heterogeneous distributed dat...

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international Conference on parallel and distributed Information systems

作者： S. Mehrotra R. Rastogi H.F. Korth A. Silberschatz Department of Computer Sciences University of Texas Austin Austin TX USA

The concept of serializability has been the traditionally accepted notion of correctness in database systems. However, in a heterogeneous distributed database system (HDBMS) environment, ensuring serializability is a difficult task mainly due to the desire of preserving the local autonomy of the participating local database systems. The authors introduce a new correctness criterion fur HDBMSs, two-level serializability (2LSR), and show that it preserves database consistency in several HDBMS models. Further, they present a simple protocol for ensuring that schedules in an HDBMS environment are 2LSR. This protocol is easily implementable and does not violate the local autonomy of sites.< >

关键词： Database systems Transaction databases Protocols Concurrent computing Scheduling distributed databases National electric code Information technology

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