Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Concurrency Control for Replicated Databases

  • Bettina Kemme
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_433

Synonyms

Isolation in Replicated Databases

Definition

Data replication is a core technology to achieve fault tolerance, high availability, and increased performance. Each “logical” data item has one or more physical data copies, also called replicas, that are distributed across the database servers in the system. Replica controlis the task of translating the read and write operations on logical data items into operations on the physical data copies. When data is accessed with transactional context, replica control has to be combined with concurrency control in order to provide global isolation of concurrent transactions across the entire system. Just as centralized database systems, replicated database systems offer several levels of isolation and replica consistency. One-copy serializability was developed as a first – and very strong – correctness criterion requiring that the concurrent execution of transactions in a replicated system is equivalent to a serial execution of these...

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Copyright information

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

Authors and Affiliations

  1. 1.School of Computer ScienceMcGill UniversityMontrealCanada