concurrency user 中文意思是什麼
concurrency user
解釋
並發用戶- concurrency : 並發性
- user : n. 1. 使用者，用戶。2. 吸毒成癮者。n. 【法律】（財產等的）使用（權），行使（權），享受（權），享有（權）。
-
In particular, it excludes concurrency failures which can happen in well - designed, multi - user applications and data - integrity violations which often happen when registering new users, for example
特別是，它排除了並發錯誤（在設計良好的、多用戶應用程序中會出現）和數據完整性破壞（如通常在注冊新用戶時發生）的情況。 -
When more than one user can change the database concurrently, there is the potential for concurrency conflict
當不止一個用戶可以同時更改數據庫時，存在潛在的並發沖突。 -
The fopt scheme, which is the focus of our research, is used to preserve user intension and convergence. the main idea of fopt is to maintain a mapping relation between document and operation history buffer through proper organization of the history buffer, and to resolve concurrency conflicts by employing a hide / resume scheme
操作變換是我們的主要關注和貢獻，其主要思想是通過合理地組織操作歷史緩沖記錄使之與文檔本身形成一種映射關系，並在操作變換的過程中採用隱藏/恢復並發操作的機制來解決並發沖突。 -
This paper introduces the design and implementation of a general - purpose framework for object persisting based on. net in detail, which provides user with transparent service to persist object with relational database. this paper not only introduces the application of primary function such as crud but also discusses the way to optimist the framework and the management of transaction and concurrency of objects
Net平臺上一個基於o / r映射理論的通用持久層框架的設計實現過程，該持久層框架為用戶提供了透明的對象持久化方法，並通過使用設計模式，使得該框架更具擴展性。 -
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。
分享友人