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GHOST: Fine Granularity Buffering of Indexes.

Cheng Hian Goh, Beng Chin Ooi, D. Sim, Kian-Lee Tan: GHOST: Fine Granularity Buffering of Indexes. VLDB 1999: 339-350
@inproceedings{DBLP:conf/vldb/GohOST99,
  author    = {Cheng Hian Goh and
               Beng Chin Ooi and
               D. Sim and
               Kian-Lee Tan},
  editor    = {Malcolm P. Atkinson and
               Maria E. Orlowska and
               Patrick Valduriez and
               Stanley B. Zdonik and
               Michael L. Brodie},
  title     = {GHOST: Fine Granularity Buffering of Indexes},
  booktitle = {VLDB'99, Proceedings of 25th International Conference on Very
               Large Data Bases, September 7-10, 1999, Edinburgh, Scotland,
               UK},
  publisher = {Morgan Kaufmann},
  year      = {1999},
  isbn      = {1-55860-615-7},
  pages     = {339-350},
  ee        = {db/conf/vldb/GohOST99.html},
  crossref  = {DBLP:conf/vldb/99},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX

Abstract

Buffering has all along been an important strategy for exploiting the cost/performance ratio of disk versus random-access memory. The buffering of disk pages belonging to a database has been well-studied, but literature that deals specifically with index buffering is scare. This is surprising given the significance of indexes (especially B+-tree like indexes) in modern DBMSs. In this paper, we describe a dual buffering scheme for indexes, called GHOST, in which part of the buffer is used to maintain popularly used "paths" of the B+-tree index, while the remainder is devoted to maintaining a Splay-tree with pointers to leaf pages containing frequently used leaf pages. This scheme allows us to maintain pointers to leaf nodes long after the paths leading to the leaf nodes have been replaced, thus maintaining "ghost" paths to the nodes. In addition to describing the search and maintenance operations for the GHOST buffering scheme, we also conduct a series of experiments in which it is shown that GHOST outperforms the best existing schemes (ILRU and OLRU) by impressive margins for almost all pragmatic query workloads.

Copyright © 1999 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.


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Printed Edition

Malcolm P. Atkinson, Maria E. Orlowska, Patrick Valduriez, Stanley B. Zdonik, Michael L. Brodie (Eds.): VLDB'99, Proceedings of 25th International Conference on Very Large Data Bases, September 7-10, 1999, Edinburgh, Scotland, UK. Morgan Kaufmann 1999, ISBN 1-55860-615-7
Contents BibTeX

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