concurrency control mechanism 中文意思是什麼

concurrency control mechanism 解釋
並發控制機制
  • concurrency : 並發性
  • control : n 1 支配，管理，管制，統制，控制；監督。2 抑制（力）；壓制，節制，拘束；【農業】防治。3 檢查；核...
  • mechanism : n 1 （機械）結構；機械裝置[作用]；（故事的）結構。2 【哲學】機械論 （opp vitalism）。 3 【文藝】...
  1. Locking is used as the concurrency control mechanism

    鎖定可以用作並發控制機制。
  2. 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並發調度中，可能存在的並發沖突，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點的並發調度演算法，並給出了該演算法的並發調度正確性證明，解決多級安全條件下的隱通道和饑餓問題。
  3. 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兩個介面上分別實現，並且引入視圖生成樹的概念，在ods / db介面處採用基於改進嵌套事務模型的並發控制機制，聯機維護ods的數據，大大提高了視圖維護過程中的並發度和靈活性。
  4. There is no specific concurrency control mechanism available

    沒有可以使用的特定的並發控制機制。
  5. 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並發控制機制。
  6. 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採用的並發控制機制，並對訪問控制機制進行了探討。
  7. 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 ）並發控制系統實現針對所提出的協同模型，運用所研究的並發控制機制，設計和部分實現了一個支持協同設計的並發控制系統。
  8. 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

    本文對安全數據庫並發控制理論和實現方法進行討論，提出了nhstm多級事務模型，並將該模型應用於nhsdb多級安全數據庫的並發控制機制中。
  9. As the application of distributed computing is used much more widely ， distributed database becomes a significant part of information management it avoids a lot of disadvantages of conventional centralized database ， and is applicable to many situations distributed database is a set of data which is the unity logic ， but in fact these data is located on different sites it is of high availability ， easy expansibility ， high concurrency ， high efficiency and etc in distributed system ， data redundancy is a method to improve the speed of query and the availability of system distributed query should shield the lower level details of data redundancy from end users ， distributed transaction should ensure data from disaccord this paper introduces basic conceptions of distributed database firstly ， discusses distributed transaction and concurrent control ， describes the development prototype mysql ’ s characters ， architecture and executive mechanism ， then shows the skeleton model of dpsql and exposes the strategy and algorithm of distributed query and distributed transaction ， at last analyzes the extra expenses and response delay of distributed processes this paper exposes the implementation mechanism of distributed query and distributed transaction emphatically distributed query uses the strategy of “ read one ， write a11 ” s0 in such a system if user ’ s requests are read - - only for the most part and the distribution of data redundancy is plausible ， efficiency is very high distributed transaction uses two - 。 phase commit protocol to ensure the consistency of global data ， which has less communication overhead

    分散式查詢需要向用戶屏蔽數據冗餘分散的底層細節，分散式事務處理要保證全局數據完整，這都是傳統集中式數據庫不曾面臨的問題。本文首先介紹了分散式數據庫的概念性問題；接著討論了分散式事務涉及的定義及演算法；然後描述了dpsql的原型mysql的特性、結構和執行機制；繼而給出了dpsql的梗概模型，闡述了實現分散式查詢和分散式事務處理的策略及演算法；最後分析了進行分散式處理給系統增加的額外開銷和客戶端的額外響應延遲。本文重點描述了分散式查詢和分散式事務處理的實現機制，分散式查詢採用」讀一個寫全部」的本地優先策略，在讀操作頻繁的系統中，只要庫的分佈合理，單機效率極高，幾乎無任何附加開銷和延遲，而以整個系統的角度看來，吞吐量就更是優于單機系統；分散式事務處理採用兩階段提交協議，通信次數較少並能確實保證副本一致。
  10. Lock mechanism of that concurrency control can effectively void the dead - lock, two phase commit can guarantee atomicity of the distribute transaction while distributed transaction is executed with which the consistency of the database system is guaranteed. the method of checking the inconsistent is mainly to track the update status of multiple repetitions when distributed and parallel database system is not busy, and to detect inconsistent early. consequently, system can be recovered to best status

    數據庫在執行分散式事務的時候，並發控制的鎖機制可有效的預防分散式事務中的死鎖現象，兩階段的提交協議可以保證分散式事務執行的原子性，從而有效地保證了分散式并行數據庫系統的一致性，不一致性檢測的方法主要是在保證系統非繁忙狀態下對多個副本間的數據庫的更新狀態進行跟蹤，也保證了數據庫多個副本間不一致狀態的及早發現，從而使系統及時地恢復到最佳運行狀態，提高了分散式并行數據庫系統的可用性。
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