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Logging and Recovery

  • Reference work entry
  • First Online:
Encyclopedia of Database Systems

  • 22 Accesses

Synonyms

Backup; Checkpoint; Dump; Failure handling; Redo; Rollback; Undo

Definition

Logging and recovery ensure that failures are masked to the users of transaction-based data management systems by providing automatic treatment for different kinds of failures, such as transaction failures, system failures, and media failures and disasters. The main goal is to guarantee the atomicity (A) and durability (D) properties of ACID transactions by providing undo recovery for failed transactions and redo recovery for committed transactions. Logging is the task of collecting redundant data needed for recovery.

Key Points

The ACID concept requires that no data changes of failed transactions remain in the database. Failed transactions thus have to be rolled back by undoing all their changes (undo recovery). On the other hand, data changes of successfully ended (committed) transactions must not be lost but have to survive possible failures. Failure treatment thus implies a redo recovery for...

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Recommended Reading

  1. Gray J, Reuter A. Transaction processing: concepts and techniques. San Francisco: Morgan Kaufmann; 1983.

    MATH  Google Scholar 

  2. Haerder T, Reuter A. Principles of transaction-oriented database recovery. ACM Comput Surv. 1983;15(4):287–317.

    Article  MathSciNet  Google Scholar 

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Author information

Authors and Affiliations

  1. University of Leipzig, Leipzig, Germany

    Erhard Rahm

Authors
  1. Erhard Rahm
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Corresponding author

Correspondence to Erhard Rahm .

Editor information

Editors and Affiliations

  1. Georgia Institute of Technology College of Computing, Atlanta, GA, USA

    Ling Liu

  2. University of Waterloo School of Computer Science, Waterloo, ON, Canada

    M. Tamer Özsu

Section Editor information

  1. Dep. of Inf. Systems, Westf. Wilhelms-Univeristät, Münster, Germany

    Gottfried Vossen

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© 2018 Springer Science+Business Media, LLC, part of Springer Nature

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Rahm, E. (2018). Logging and Recovery. In: Liu, L., Özsu, M.T. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8265-9_212

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