Extended Commitment Ordering or Guaranteeing Global Serializability by Applying Commitment Order Selectivity to Global Transactions.

@inproceedings{DBLP:conf/pods/Raz93,
  author    = {Yoav Raz},
  title     = {Extended Commitment Ordering or Guaranteeing Global Serializability
               by Applying Commitment Order Selectivity to Global Transactions},
  booktitle = {Proceedings of the Twelfth ACM SIGACT-SIGMOD-SIGART Symposium
               on Principles of Database Systems, May 25-28, 1993, Washington,
               DC},
  publisher = {ACM Press},
  year      = {1993},
  isbn      = {0-89791-593-3},
  pages     = {83-96},
  ee        = {http://doi.acm.org/10.1145/153850.153858, db/conf/pods/Raz93.html},
  crossref  = {DBLP:conf/pods/93},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

The Extended Commitment Ordering (ECO) property of transaction histories (schedules) generalizes the Commitment Ordering (CO) property defined in [Raz 90]. In a multi resource manager (RM) environment ECO guarantees global serializability when supported locally by each RM that participates in global transactions (i.e., transactions that span more than a single RM) and provides local serializability (by any mechanism). ECO assumes that a RM has the knowledge to distinguish local transactions (i.e., transactions confined to that RM) from global transactions. ECO imposes an order condition, similar to the CO condition, on the commit events of global transactions only, and thus, it is less constraining than CO.

Like CO, ECO provides a fully distributed solution to the long standing problem of guaranteeing global serializability across RMs with different concurrency control mechanisms. Also, like CO, no communication beyond atomic commitment (AC) protocol messages is required to enforce ECO.

When RMs are provided with the information about transactions being local, and are coordinated solely via AC protocols (have the extended knowledge autonomy property), ECO, applied locally together with local serializability in each RM involved with global transactions, is a necessary condition for guaranteeing global serializability.

ECO reduces to CO when all the transactions are assumed to be global (e.g. if no knowledge about the transactions being local is available).

Copyright © 1993 by the ACM, Inc., used by permission. Permission to make digital or hard copies is granted provided that copies are not made or distributed for profit or direct commercial advantage, and that copies show this notice on the first page or initial screen of a display along with the full citation.

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