| 摘要: |
| 传统的原子事务是由一个平坦数据库操作序列组成的,事 务的执行具有ACID(Atomicity, Consistency, Isolation, Durability)特性.然而,在实时 应用环境下,这些却不太适用.该文提出了一种支持实时应用的嵌套事务模型,给出了嵌套事 务的特性及正确性标准,着重对嵌套实时事务的优先级分派与并发控制协议进行了讨论. |
| 关键词: 事务模型,嵌套事务,优先级分派,并发控制,事务正确性, 实时数据库. |
| DOI： |
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| 基金项目:本文研究得到国家自然科学基金和国防预研基金资助. |
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| Nested Transactions in Real-time Database Systems |
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LIU Yun-sheng,LI Guo-hui
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| Abstract: |
| In the traditional transaction model, a trans action is a flat sequence of the database operations and the executions of trans actions have the ACID(Atomicity, Consistency, Isolation, Durability) properties. But under the real-time environment, these appear unsuitable. A nested transac tion model to support real-time applications is proposed and the properties and the correctness stanadards of nested transactions are presented in this pap er. The priority assignment strategies and the concurrency control protocol for nested real-time transactions are discussed with emphasis. |
| Key words: Transaction model, nested transaction, pri ority assignment, concurrency control, transaction correctness, real-time d atabase. |
