Download or read book Dynamic Load Balancing in Parallel Join written by Jianfang Li and published by . This book was released on 1995 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Load Balanced Join Processing written by National University of Singapore. Dept. of Information Systems and Computer Science and published by . This book was released on 1993 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "In this paper, we revisit the problem of processing joins in shared-nothing systems. In such systems, a join query is usually split into a set of tasks that are allocated to the nodes in the system where the tasks could be executed concurrently and independently. While parallel processing could greatly reduce the completion time of a joint operation, the system performance may degrade because of load imbalance across the nodes caused by data skewness in the relations. Most of the previous studies addressed this issue by static load balancing. We proposed here two dynamic load balancing join strategies and compared their performance with two static algorithms. The result of our study shows that dynamically balancing the join load is not only feasible but also provides good system performance."
Download or read book Predictive Dynamic Load Balancing of Parallel Hash joins Over Heterogeneous Processors in the Presence of Data Skew written by Columbia University. Dept. of Computer Science and published by . This book was released on 1994 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "In this paper, we present new algorithms to balance the computation of parallel hash joins over heterogeneous processors in the presence of data skew and external loads. Heterogeneity in our model consists of disparate computing elements, as well as general purpose computing ensembles that are subject to external loading (e.g., a LAN connected workstation cluster). Data skew manifests itself as significant nonuniformities in the distribution of attribute values of underlying relations that are involved in a join. We develop cost models and predictive dynamic load balancing protocols to detect imbalance during the computation of a single large join. New predictive bucket scheduling algorithms are presented that smooth out the load over the entire ensemble by reallocating buckets whenever imbalance is detected. Our algorithms can account for imbalance due to data skew as well as heterogeneity in the computing environment. Significant performance gains are reported for a wide range of test cases on a prototype implementation of the system."
Download or read book Dynamic Load Distribution for Parallel Applications written by Georg Stellner and published by Springer-Verlag. This book was released on 2013-07-29 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Euro Par 96 Parallel Processing written by Luc Bouge and published by Springer Science & Business Media. This book was released on 1996-08-14 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: Content Description #Includes bibliographical references and index.
Download or read book Dynamic Load Balancing on Highly Parallel Multicomputer Systems written by Marc Hubert Willebeek-LeMair and published by . This book was released on 1990 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Performance Parallel Database Processing and Grid Databases written by David Taniar and published by John Wiley & Sons. This book was released on 2008-09-17 with total page 575 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest techniques and principles of parallel and grid database processing The growth in grid databases, coupled with the utility of parallel query processing, presents an important opportunity to understand and utilize high-performance parallel database processing within a major database management system (DBMS). This important new book provides readers with a fundamental understanding of parallelism in data-intensive applications, and demonstrates how to develop faster capabilities to support them. It presents a balanced treatment of the theoretical and practical aspects of high-performance databases to demonstrate how parallel query is executed in a DBMS, including concepts, algorithms, analytical models, and grid transactions. High-Performance Parallel Database Processing and Grid Databases serves as a valuable resource for researchers working in parallel databases and for practitioners interested in building a high-performance database. It is also a much-needed, self-contained textbook for database courses at the advanced undergraduate and graduate levels.
Download or read book An Adaptive Load Balancing Parallel Join Algorithm written by Minesh B. Amin and published by . This book was released on 1995 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Many parallel join algorithms have been proposed in the last several years. However, most of these algorithms require that the amount of data to be joined is known in advance in order to choose the proper number of join processors. This is an unrealistic assumption because data sizes are typically unknown, and are notoriously hard to estimate. We present an adaptive, load-balancing parallel join algorithm called PJLH to address this problem. PJLH efficiently adapts itself to use additional processors if the amount of data is larger than expected. Furthermore, while adapting, it ensures a good load balancing of data across the processors. We have implemented and analyzed PJLH on a main memory database system implemented on a cluster of workstations. We show that PJLH is nearly as efficient as an optimal algorithm when the amount of data is known in advance. Furthermore, we show that PJLH efficiently adapts to use additional join processors when necessary, while maintaining a balanced load. This makes PJLH especially well-suited for processing multi-join queries where the cardinalities of intermediate relations are very difficult to estimate."
Download or read book Computational Science and Its Applications ICCSA 2006 written by Osvaldo Gervasi and published by Springer. This book was released on 2006-05-11 with total page 1069 pages. Available in PDF, EPUB and Kindle. Book excerpt: The five-volume set LNCS 3980-3984 constitutes the refereed proceedings of the International Conference on Computational Science and Its Applications, ICCSA 2006. The volumes present a total of 664 papers organized according to the five major conference themes: computational methods, algorithms and applications high performance technical computing and networks advanced and emerging applications geometric modelling, graphics and visualization information systems and information technologies. This is Part V.
Download or read book Dynamic Load Balancing for Parallel and Distributed Systems written by Zhiling Lan and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There are many scientific applications for which the computational load varies throughout the execution and causes uneven distribution of workload during run-time. One such class of applications is Adaptive Mesh Refinement (AMR) applications. AMR is a type of multiscale algorithm that achieves high resolution in localized regions of dynamic, multidimensional numerical simulations. A typical AMR application may require enormous computing resources, which usually cannot be satisfied by a single-processor machine, thereby requiring parallel and distributed systems. One of the key issues related to AMR is dynamic load balancing (DLB), which allows large-scale adaptive applications to run efficiently on parallel and distributed systems. In investigating DLB schemes, we first complete a detailed analysis of structured AMR (SAMR) applications, identifying the unique characteristics that impose severe challenges on DLB schemes. The results indicate that most of the available DLB schemes are not appropriate for SAMR applications due to their unique adaptive characteristics. Thus, we propose a novel dynamic load balancing scheme for SAMR applications on parallel systems (denoted as parallel DLB). It integrates a grid-splitting technique with direct grid movements, for which the objective is to reduce the parallel execution time. Further, our experiment shows that simply moving a DLB scheme designed for parallel systems to distributed systems will introduce significant overhead. Therefore, we propose a framework for dynamic load balancing on distributed systems (denoted as distributed DLB). It takes into consideration: (1) heterogeneity of processors, (2) heterogeneity of networks, (3) shared nature of networks, and (4) adaptive characteristics of the applications. For SAMR applications, the distributed DLB incorporates the proposed parallel DLB during the load balancing process. Both parallel DLB and distributed DLB were implemented in the ENZO code, a parallel implementation of SAMR in astrophysics and cosmology. Experiments show that the proposed DLB schemes can significantly improve the performance of SAMR applications on both parallel and distributed systems in terms of the total execution time and the quality of load balancing.
Download or read book Euro Par 2002 Parallel Processing written by Burkhard Monien and published by Springer Science & Business Media. This book was released on 2002-08-21 with total page 1017 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 8th European Conference on Parallel Computing, Euro-Par 2002, held in Paderborn, Germany in August 2002. The 67 revised full papers and 55 research note papers presented together with 6 invited papers were carefully reviewed and selected from 265 submissions. The papers presented give a unique survey of the state of the art in parallel computing research, ranging from algorithms, software, hardware and application in various fields.
Download or read book Euro Par 99 Parallel Processing written by Patrick Amestoy and published by Springer. This book was released on 2003-05-21 with total page 1503 pages. Available in PDF, EPUB and Kindle. Book excerpt: Euro-Parisaninternationalconferencededicatedtothepromotionandadvan- ment of all aspects of parallel computing. The major themes can be divided into the broad categories of hardware, software, algorithms and applications for p- allel computing. The objective of Euro-Par is to provide a forum within which to promote the development of parallel computing both as an industrial te- nique and an academic discipline, extending the frontier of both the state of the art and the state of the practice. This is particularly important at a time when parallel computing is undergoing strong and sustained development and experiencing real industrial take-up. The main audience for and participants in Euro-Parareseenasresearchersinacademicdepartments,governmentlabora- ries and industrial organisations. Euro-Par’s objective is to become the primary choice of such professionals for the presentation of new results in their specic areas. Euro-Par is also interested in applications which demonstrate the e - tiveness of the main Euro-Par themes. There is now a permanent Web site for the series http://brahms. fmi. uni-passau. de/cl/europar where the history of the conference is described. Euro-Par is now sponsored by the Association of Computer Machinery and the International Federation of Information Processing. Euro-Par’99 The format of Euro-Par’99follows that of the past four conferences and consists of a number of topics eachindividually monitored by a committee of four. There were originally 23 topics for this year’s conference. The call for papers attracted 343 submissions of which 188 were accepted. Of the papers accepted, 4 were judged as distinguished, 111 as regular and 73 as short papers.
Download or read book Euro Par 2001 Parallel Processing written by Rizos Sakellariou and published by Springer. This book was released on 2003-06-30 with total page 993 pages. Available in PDF, EPUB and Kindle. Book excerpt: Euro-Par – the European Conference on Parallel Computing – is an international conference series dedicated to the promotion and advancement of all aspects of parallel computing. The major themes can be divided into the broad categories of hardware, software, algorithms, and applications for parallel computing. The objective of Euro-Par is to provide a forum within which to promote the dev- opment of parallel computing both as an industrial technique and an academic discipline, extending the frontiers of both the state of the art and the state of the practice. This is particularlyimportant at a time when parallel computing is undergoing strong and sustained development and experiencing real ind- trial take up. The main audience for and participants in Euro-Par are seen as researchers in academic departments, government laboratories, and industrial organisations. Euro-Par aims to become the primarychoice of such professionals for the presentation of new results in their speci?c areas. Euro-Par is also int- ested in applications that demonstrate the e?ectiveness of the main Euro-Par themes. Euro-Par has its own Internet domain with a permanent web site where the historyof the conference series is described: http://www. euro-par. org. The Euro-Par conference series is sponsored bythe Association of Computer Machineryand the International Federation of Information Processing. Euro-Par 2001 Euro-Par 2001 was organised bythe Universityof Manchester and UMIST.
Download or read book Dynamic Load Balancing in Parallel Database Systems written by Erhard Rahm and published by . This book was released on 1995 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Load Balancing in Parallel Particle Methods written by Ömer Demirel and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Framework for Dynamic Load Balancing and Physical Reorganization in Parallel Database Systems written by Waheed Iqbal Qureshi and published by . This book was released on 1996 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A FRAMEWORK FOR SCALABLE DISTRIBUTED JOB PROCESSING WITH DYNAMIC LOAD BALANCING USING DECENTRALIZED APPROACH written by Dr P. SrinivasaRao and published by Lulu.com. This book was released on 2017-12-30 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: A distributed system consists of many heterogeneous processors with different processing power and all processors are interconnected with a communication channel. In such a system, if some processors are less loaded or idle and others are heavily loaded, the system performance will be reduced drastically. System performance can be improved by using proper load balancing [1, 4]. The aim of load balancing is to improve the performance measures and reduce the overall completion time and cost
