Is distributed locking harder?

  • Authors:
  • Paris C. Kanellakis;Christos H. Papadimitriou

  • Affiliations:
  • Brown University;Massachusetts Institute of Technology and National Technical University of Athens

  • Venue:
  • PODS '82 Proceedings of the 1st ACM SIGACT-SIGMOD symposium on Principles of database systems
  • Year:
  • 1982

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Abstract

We examine the problem of determining whether a set of locked transactions, accessing a distributed database, is guaranteed to produce only serializable schedules. For a pair of transactions we prove that this concurrency control problem (which is polynomially solvable for centralized databases) is in general coNP-complete. We employ a new graph-theoretic technique and provide an efficient test for the special case of databases distributed between two sites only.