ACM SIGMOD Anthology VLDB dblp.uni-trier.de

Optimization Algorithms for Exploiting the Parallelism-Communication Tradeoff in Pipelined Parallelism.

Waqar Hasan, Rajeev Motwani: Optimization Algorithms for Exploiting the Parallelism-Communication Tradeoff in Pipelined Parallelism. VLDB 1994: 36-47
@inproceedings{DBLP:conf/vldb/HasanM94,
  author    = {Waqar Hasan and
               Rajeev Motwani},
  editor    = {Jorge B. Bocca and
               Matthias Jarke and
               Carlo Zaniolo},
  title     = {Optimization Algorithms for Exploiting the Parallelism-Communication
               Tradeoff in Pipelined Parallelism},
  booktitle = {VLDB'94, Proceedings of 20th International Conference on Very
               Large Data Bases, September 12-15, 1994, Santiago de Chile, Chile},
  publisher = {Morgan Kaufmann},
  year      = {1994},
  isbn      = {1-55860-153-8},
  pages     = {36-47},
  ee        = {db/conf/vldb/vldb94-36.html},
  crossref  = {DBLP:conf/vldb/94},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

We address the problem of finding parallel plans for SQL queries using the two-phase approach of join ordering followed by parallelization. We focus on the parallelization phase and develop algorithms for exploiting pipelined parallelism. We formulate parallelization as scheduling a weighted operator tree to minimize response time. Our model of response time captures the fundamental tradeoff between parallel execution and its communication overhead. We assess the quality of an optimization algorithm by its performance ratio which is the ratio of the response time of the generated schedule to that of the optimal. We develop fast algorithms that produce near-optimal schedules - the performance ratio is extremely close to 1 on the average and has a worst case bound of about 2 for many cases.

Copyright © 1994 by the VLDB Endowment. Permission to copy without fee all or part of this material is granted provided that the copies are not made or distributed for direct commercial advantage, the VLDB copyright notice and the title of the publication and its date appear, and notice is given that copying is by the permission of the Very Large Data Base Endowment. To copy otherwise, or to republish, requires a fee and/or special permission from the Endowment.


Online Paper

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Printed Edition

Jorge B. Bocca, Matthias Jarke, Carlo Zaniolo (Eds.): VLDB'94, Proceedings of 20th International Conference on Very Large Data Bases, September 12-15, 1994, Santiago de Chile, Chile. Morgan Kaufmann 1994, ISBN 1-55860-153-8
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