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TKDE
1998

Distributed Optimistic Concurrency Control Methods for High-Performance Transaction Processing

9 years 1 months ago
Distributed Optimistic Concurrency Control Methods for High-Performance Transaction Processing
—There is an ever-increasing demand for more complex transactions and higher throughputs in transaction processing systems leading to higher degrees of transaction concurrency and, hence, higher data contention. The conventional two-phase locking (2PL) Concurrency Control (CC) method may, therefore, restrict system throughput to levels inconsistent with the available processing capacity. This is especially a concern in shared-nothing or data-partitioned systems due to the extra latencies for internode communication and a reliable commit protocol. The optimistic CC (OCC) is a possible solution, but currently proposed methods have the disadvantage of repeated transaction restarts. We present a distributed OCC method followed by locking, such that locking is an integral part of distributed validation and two-phase commit. This method ensures at most one re-execution, if the validation for the optimistic phase fails. Deadlocks, which are possible with 2PL, are prevented by preclaiming lo...
Alexander Thomasian
Added 23 Dec 2010
Updated 23 Dec 2010
Type Journal
Year 1998
Where TKDE
Authors Alexander Thomasian
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