Random Sampling from B+ Trees.
Frank Olken, Doron Rotem:
Random Sampling from B+ Trees.
VLDB 1989: 269-277@inproceedings{DBLP:conf/vldb/OlkenR89,
author = {Frank Olken and
Doron Rotem},
editor = {Peter M. G. Apers and
Gio Wiederhold},
title = {Random Sampling from B+ Trees},
booktitle = {Proceedings of the Fifteenth International Conference on Very
Large Data Bases, August 22-25, 1989, Amsterdam, The Netherlands},
publisher = {Morgan Kaufmann},
year = {1989},
isbn = {1-55860-101-5},
pages = {269-277},
ee = {db/conf/vldb/OlkenR89.html},
crossref = {DBLP:conf/vldb/89},
bibsource = {DBLP, http://dblp.uni-trier.de}
}
Abstract
We consider the design and analysis of algorithms to retrieve simple random samples from databases.
Specifically, we examine simple random sampling from B+ treefiles.
Existing methods of sampling from B+ trees, require the use of auxiliary rank information in the nodes of the tree.
Such modified B+ tree files are called "ranked B+trees".
We compare sampling from ranked B+ tree files, with new acceptance/rejection (A/R) sampling methods which sample directly from standard B+ trees.
Our new A/R sampling algorithm can easily be retrofit to existing DBMSs, and does not require the overhead of maintaining rank information.
We consider both iterative and batch sampling methods.
Copyright © 1989 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
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is by the permission of the Very Large Data Base
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a fee and/or special permission from the Endowment.
Online Paper
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Printed Edition
Peter M. G. Apers, Gio Wiederhold (Eds.):
Proceedings of the Fifteenth International Conference on Very Large Data Bases, August 22-25, 1989, Amsterdam, The Netherlands.
Morgan Kaufmann 1989, ISBN 1-55860-101-5
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Copyright © Tue Mar 16 02:22:00 2010
by Michael Ley (ley@uni-trier.de)