Concurrency Control Manager

Concurrency control manager; Lock manager; Synchronization component

The concurrency control manager (CCM) synchronizes the concurrent access of database transactions to shared objects in the database. It is responsible for maintaining the guarantees regarding the effects of concurrent access to the shared database, i.e., it will protect each transaction from anomalies that can result from the fact that other transactions are accessing the same data at the same time. Ideally, it will make sure that the result of transactions running in parallel is identical to the result of some serial execution of the same transactions. In real applications, however, some transactions may opt for lower levels of synchronization, thus trading protection from side effects of other transactions for performance. The CCM is responsible for orchestrating all access requests issued by the transactions such that each transaction receives the level of protection it has asked for. The CCM...

Authors and Affiliations

1. EML Research GmbH Villa Bosch, Heidelberg, Germany

   Andreas Reuter

2. Technical University Kaiserslautern, Kaiserslautern, Germany

   Andreas Reuter

Editors and Affiliations

1. College of Computing, Georgia Institute of Technology, 266 Ferst Drive, 30332-0765, Atlanta, GA, USA

   LING LIU (Professor) (Professor)

2. Database Research Group David R. Cheriton School of Computer Science, University of Waterloo, 200 University Avenue West, N2L 3G1, Waterloo, ON, Canada

   M. TAMER ÖZSU (Professor and Director, University Research Chair) (Professor and Director, University Research Chair)

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