Garbage Collection in Object Oriented Databases Using Transactional Cyclic Reference Counting.

Srinivas Ashwin, Prasan Roy, S. Seshadri, Abraham Silberschatz, S. Sudarshan: Garbage Collection in Object Oriented Databases Using Transactional Cyclic Reference Counting. VLDB 1997: 366-375

@inproceedings{DBLP:conf/vldb/AshwinRSSS97,
  author    = {Srinivas Ashwin and
               Prasan Roy and
               S. Seshadri and
               Abraham Silberschatz and
               S. Sudarshan},
  editor    = {Matthias Jarke and
               Michael J. Carey and
               Klaus R. Dittrich and
               Frederick H. Lochovsky and
               Pericles Loucopoulos and
               Manfred A. Jeusfeld},
  title     = {Garbage Collection in Object Oriented Databases Using Transactional
               Cyclic Reference Counting},
  booktitle = {VLDB'97, Proceedings of 23rd International Conference on Very
               Large Data Bases, August 25-29, 1997, Athens, Greece},
  publisher = {Morgan Kaufmann},
  year      = {1997},
  isbn      = {1-55860-470-7},
  pages     = {366-375},
  ee        = {db/conf/vldb/AshwinRSSS97.html},
  crossref  = {DBLP:conf/vldb/97},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

Garbage Collection is important in object-oriented databases to free the programmer from explicitely deallocating memory. In this paper, we present a garbage collection algorithm, called Transactional Cyclic Reference Counting (TCRC), for object oriented databases. The algorithm is based on a variant of a reference counting algorithm proposed for functional programming languages. The algorithm keeps track of auxiliary reference count information to detect and collect cyclic garbage. The algorithms works correctly in the presence of concurrently running transactions, and system failures. It does not obtain any long term locks, thereby minimizing interference with transaction processing. It uses recovery subsystem logs to detect pointer updates; thus existing code need not be rewritten. Finally, it exploits schema information, if available, to reduce costs. We have implemented the TCRC algorithm and present results of a performance study of the implementation.

Copyright © 1997 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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Matthias Jarke, Michael J. Carey, Klaus R. Dittrich, Frederick H. Lochovsky, Pericles Loucopoulos, Manfred A. Jeusfeld (Eds.): VLDB'97, Proceedings of 23rd International Conference on Very Large Data Bases, August 25-29, 1997, Athens, Greece. Morgan Kaufmann 1997, ISBN 1-55860-470-7
Contents

References

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