AN OPTIMISTIC LOCKING TECHNIQUE FOR CONCURRENCY-CONTROL IN DISTRIBUTED DATABASES

Date

1991-07-01

Author

Halıcı, Uğur

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An optimistic scheme, called ODL, which uses dummy locks to test the validity of a transaction for concurrency control in distributed database systems, is suggested. The dummy locks are long-term locks; however, they do not conflict with any other lock. By the use of long-term dummy locks, the need for the information about the write sets of validated transactions is eliminated and during the validation test only the related sites are checked. Also, the transactions to be aborted are immediately recognized before the validation test, and therefore, the costs of restarts are reduced. Furthermore, usual read and write locks are used as short-term locks during the validation test. The use of short-term locks in the optimistic approach eliminates the need for the system-wide critical section and results in a distributed and parallel validation test.

Subject Keywords

Concurrency control, Correctness of concurrency control, Distributed database systems, Optimistic locking, Optimistic schedulers, Serializability, 2-phase locking

URI

https://hdl.handle.net/11511/57748

Journal

IEEE TRANSACTIONS ON SOFTWARE ENGINEERING

DOI

https://doi.org/10.1109/32.83907

Collections

Department of Electrical and Electronics Engineering, Article

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Citation Formats

U. Halıcı, “AN OPTIMISTIC LOCKING TECHNIQUE FOR CONCURRENCY-CONTROL IN DISTRIBUTED DATABASES,” IEEE TRANSACTIONS ON SOFTWARE ENGINEERING, pp. 712–724, 1991, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57748.