Locking is used as the concurrency control mechanism 鎖定可以用作并發控制機制。
There is no specific concurrency control mechanism available 沒有可以使用的特定的并發控制機制。
Operations , as not all classes need such a concurrency control mechanism 操作外面加上鎖,因為不是所有類都需要這種并發控制機制。
In this thesis , concurrency control mechanism is studied in depth which is used when multiple users access sharing data simultaneously . access control mechanism is also discussed 本文深入研究協同設計中的多個用戶同時訪問共享資源時所采用的并發控制機制,并對訪問控制機制進行了探討。
4 . concurrency control system implementation corresponding to the collaborative design model , a concurrency control system is designed and implemented partly to apply the concurrency control mechanism discussed above to support collaborative design ( 4 )并發控制系統實現針對所提出的協同模型,運用所研究的并發控制機制,設計和部分實現了一個支持協同設計的并發控制系統。
In this paper , we discuss the theories and the implemention method of concurrency control , present a new multilevel transaction model - - - nhstm and apply this model to the concurrency control mechanism for nhsdb , a multilevel security dbms prototype 本文對安全數據庫并發控制理論和實現方法進行討論,提出了nhstm多級事務模型,并將該模型應用于nhsdb多級安全數據庫的并發控制機制中。
This paper decomposes materialized views maintenance into ods / db interface and dw / ods interface . multiple data sources with concurrent updates may result in update anomalies of the materialized views . so at ods / db interface this paper introduces an improved nested transaction model - based transaction concurrency control mechanism to maintenance views in ods on line 本文把視圖的一致性維護問題分解到三層結構的ods / dw和dw / ods兩個接口上分別實現,并且引入視圖生成樹的概念,在ods / db接口處采用基于改進嵌套事務模型的并發控制機制,聯機維護ods的數據,大大提高了視圖維護過程中的并發度和靈活性。
We analysis the conflict , convert channel and starvation problems of concurrent schedule based on strict - 2pl locking protocal which applies nhstm model , then present a concurrent scheduling algorithm making use of buffer and point p . also , we proved the concurrent schedule algorithm is serializable . at the same time , we introduce the key technical used in nhsdb concurrency control mechanism , and give the implementation details 我們對應用nhstm模型的,通過應用嚴格兩段鎖協議實施的并發調度中,可能存在的并發沖突,隱通道和饑餓問題進行分析,在此基礎上提出了一種利用緩沖和p點的并發調度算法,并給出了該算法的并發調度正確性證明,解決多級安全條件下的隱通道和饑餓問題。