Results 281 to 290 of about 247,233 (313)

Distributed skyline trajectory query processing

Proceedings of the ACM Turing 50th Celebration Conference - China, 2017
The massive amount of trajectory data collected from GPS has emerged in recent year. Many researchers proposed trajectory queries such as top-k query. They focused to solve them based on distance and text relevance. However, the weight of these queries are unknown. Therefore, we plan to handle the trajectory skyline query based on distance and activity
Amina Belhassena, Wang HongZhi
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Dynamic distributed query processing techniques

Proceedings of the seventeenth annual ACM conference on Computer science : Computing trends in the 1990's Computing trends in the 1990's - CSC '89, 1989
As optimization of strategies to process queries in a Distributed DataBase (DDB) uses various techniques to estimate the sizes of partial results and other parameters pertaining to the distributed environment, if these estimates are inaccurate the strategies may be far from optimal.
P. Bodorik, J. S. Riordon, C. Jacob
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Distributed Query Processing

2019
By hiding the low-level details about the physical organization of the data, relational database languages allow the expression of complex queries in a concise and simple manner. In particular, to construct the answer to the query, the user does not precisely specify the procedure to follow; this procedure is actually devised by a module, called a ...
M. Tamer Özsu, Patrick Valduriez
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Multi-query Optimization for Distributed Similarity Query Processing

2008 The 28th International Conference on Distributed Computing Systems, 2008
This paper considers a multi-query optimization issue for distributed similarity query processing, which attempts to exploit the dependencies in the derivation of a query evaluation plan. To the best of our knowledge, this is the first work investigating a multi- query optimization technique for distributed similarity query processing (MDSQ).
Yi Zhuang, Qing Li, Lei Chen
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Query processing in Distributed PIOS

Proceedings of 7th International Conference and Workshop on Database and Expert Systems Applications: DEXA 96, 2002
An approach to query processing in object oriented distributed database systems is proposed. Distributed PIOS is a server that supports an object-oriented data model, physical data independence (i.e. different strategies for storing class hierarchies, grouping, horizontal and vertical partitioning of objects), and fragmentation transparency (i.e ...
F. Rabitti, L. Benedetti, F. Demi
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QoS-based Distributed Query Processing

Ingénierie des systèmes d'information, 2004
Among the essential functionalities supported by distributed multimedia systems, quality of service (QoS) is of prime interest and requires the involvement of different system components. This unction aims to control and guarantee the level of quality that the system is able to offer to the user. The QoS requirements may concern system performance, the
Haiwei Ye, Brigitte Kerhervé, Gregor V Bochmann   +2 more
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Distributed query processing optimization objectives

Proceedings. Fourth International Conference on Data Engineering, 2003
The authors examine objectives, or measures of cost, which can be used in optimizing queries in a distributed database (DDB). They include the delay and dollar cost due to the network data transfer, CPU processing or a combination of both, and cost measures in terms of the size of partial results. These measures are used in distributed query processing
P. Bodorik, J.S. Riordon
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Distributed query processing in Cronus

[1989] Proceedings. The 9th International Conference on Distributed Computing Systems, 2003
Four distributed query processing strategies under consideration for incorporation into the Cronus object-oriented distributed computing environment are described. Under Cronus, object storage can be embedded inside applications, and facilities are provided to distribute and replicate automatically the data maintained by the application.
S.T. Vinter, N. Phadnis, R. Floyd
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Distributed RDF Query Processing

2018
With increasing sizes of RDF datasets, executing complex queries on a single node has turned to be impractical especially when the node’s main memory is dwarfed by the volume of the dataset. Therefore, there was a crucial need for distributed systems with a high degree of parallelism that can satisfy the performance demands of complex SPARQL queries ...
Sherif Sakr, Marcin Wylot, Raghava Mutharaju, Danh Le Phuoc, Irini Fundulaki   +4 more
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Experiences with distributed query processing

[1990] Proceedings. Sixth International Conference on Data Engineering, 2002
Different implementations of an experimental distributed query processing system which is constructed on top of existing database management systems (DBMSs) are presented. A performance evaluation is carried out. It is shown that the response times of query execution are affected significantly by the degree of site autonomy, interferences among ...
C. Yu, C. Liu
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