On-the-Fly, Incremental, Consistent Reading of Entire Databases.

@inproceedings{DBLP:conf/vldb/Pu85,
  author    = {Calton Pu},
  editor    = {Alain Pirotte and
               Yannis Vassiliou},
  title     = {On-the-Fly, Incremental, Consistent Reading of Entire Databases},
  booktitle = {VLDB'85, Proceedings of 11th International Conference on Very
               Large Data Bases, August 21-23, 1985, Stockholm, Sweden},
  publisher = {Morgan Kaufmann},
  year      = {1985},
  pages     = {369-375},
  ee        = {db/conf/vldb/Pu85.html},
  crossref  = {DBLP:conf/vldb/85},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

We describe an algorithm to read entire databases with locking concurrency control allowing multiple readers or an exclusive writer. The algorithm runs concurrently with the normal transaction processing (on-the-fly), and locks the en- tities in the database one by one (incremental). We prove the algorithm produces consistent pictures of the database. We also show that the algorithm aborts a minimal number of updates in the class of on-the-fly, incremental, consistent algorithms.

On-the-fly, incremental algorithms to read entire data- bases consistently can improve system availability and reli- ability. Most existing systems either require the transaction processing to stop, or produce potentially inconsistent re- sults. Our algorithm does not change the database physical design, so it can be adapted to existing systems by expand- ing their lock table. Finally, we extend the algorithm in a straightforward way to read entire distributed databases.

Copyright © 1985 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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