| Nested Transaction Concurrency Control in Parallel Real-Time Databases |
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| 作者姓名： | 潘怡 卢炎生 |
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| 作者单位： | Computer Department, Huazhong University of Science ＆ Technology, Wuhan 430074 |
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| 摘 要： | An integrated method for concurrency control in parallel real-time databases has been proposed in this paper. The nested transaction model has been investigated to offer more atomic execution units and finer grained control within in a transaction. Based on the classical nested locking protocol and the speculative concurrency control approach, a twoshadow adaptive concurrency control protocol, which combines the Sacrifice based Optimistic Concurrency Control （OPT-Sacrifice） and High Priority two-phase locking （HP- 2PL） algorithms together to support both optimistic and pessimistic shadow of each sub-transaction, has been proposed to increase the likelihood of successful timely commitment and to avoid unnecessary replication overload.
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| 关 键 词： | 并行数据库 实时数据库 嵌套事务 并行控制 |
| 收稿时间： | 2004-10-19 |
Nested Transaction Concurrency Control in Parallel Real-Time Databases |
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| PAN Yi,LU Yan-sheng.Nested Transaction Concurrency Control in Parallel Real-Time Databases[J].Journal of Donghua University,2005,22(2):114-119. |
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| Authors: | PAN Yi LU Yan-sheng |
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| Abstract: | An integrated method for concurrency control in parallel real-time databases has been proposed in this paper. The nested transaction model has been investigated to offer more atomic execution units and finer grained control within in a transaction. Based on the classical nested locking protocol and the speculative concurrency control approach, a two-shadow adaptive concurrency control protocol, which combines the Sacrifice based Optimistic Concurrency Control (OPT-Sacrifice) and High Priority two-phase locking (HP2PL) algorithms together to support both optimistic and pessimistic shadow of each sub-transaction, has been proposed to increase the likelihood of successful timely commitment and to avoid unnecessary replication overload. |
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| Keywords: | Parallel Database Real-Time Database Nested Transaction Concurrency Control |
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