centralized database 中文意思是什麼

The better way to avoid maintenance problems is to cache the wsdl in the centralized database and then periodically check the timestamp version number of the wsdl to see if a newer one is available

為避免維護上的麻煩，更好的一個辦法就是把wsdl高速緩存在一個集中式數據庫里，然後定期檢查它的時間戳記/版本號，看看是否有一個更新的wsdl可用。

The grid is a set of newly technique that be constructed on the internet, it merges high - speed internet, high performance calculator, large database, sensors, the long range equipments into a whole, and provide more resource, functions and alternations to technological personnel and ordinary user. there are three principles to measure whether a system can be called grid or not, 1 ) coordinates resources that are not subject to centralized control ; 2 ) using standard, open, general - purpose protocols and interfaces ; 3 ) to deliver nontrivial qualities of service. a system which strictly meet the above three principles can be called grid. rid architecture includes the fabric layer - - local resources interfaces ; connectivity layer - - manage communications ; resource layer - - sharing a single resource ; pool layer - - correspond resources ; application layer ? self - definition grid application. it defined the basic construction of grid, the function and purpose of the architecture, and how to alternate these components do. in the domestic and international grid research and applied realm, digital libraries have played a pivotal role

作者在對數字圖書館網格信息資源和非網格信息資源比較的基礎上，論述了一個異構信息同構化集成的跨庫檢索的方法;構建了網格環境下數字圖書館信息資源管理和信息資源組織的概念模型，並對其中的四個主要步驟進行了論述，包括信息資源描述、信息資源發現、信息資源發布和信息資源命名;論述了元數據在dl網格信息資源組織中的應用，及基於元數據的dl網格信息資源組織的原則;其後對數字圖書館網格信息資源調度和本地資源調度的進行了比較，簡述了數字圖書館網格信息資源調度的目的和作用;對數字圖書館內容分發網路和內容分發網格進行論述和比較;最後提出在內容分發網格的基礎上，融入數字圖書館自身的特點，構架出數字圖書館內容分發（調度）網格的層次架構。

With the occurene of new application, the development of network technology and prompting popularity, database is faced with many new problems and challenge, one of which is that the alteration of operating environment bring a series of proplems. at present, database oprerationg environments are not integrated system of single database but distributed environment based on network. therefore, it has academic and realistic requirement that how to implement integrated questions of distrubited system, arrive at centralized management and share with data, meanwhile make the area disperse hindered by system

隨著新應用的出現、網路技術的發展以及www的迅速普及，數據庫在理論和實踐方面都面臨著許多新問題和新挑戰，這其中的一個問題就是數據庫運行環境的變化所帶來的一系列問題。現在數據庫的運行環境已不是單個數據庫的集中系統而是聯網的的分散式環境，因而，如何在分佈環境下實現分散式數據庫的集成問題，既達到對數據的集中管理和共享，又能使地域的分散性被系統隱蔽起來，所有這些具有理論和現實的要求。

A signal switch may also send a query message to the signal control point, which acts as a centralized database for routing instructions, such as how to handle 800 / 888 calls

信號交換機也可以向信號控制點發送一個查詢信息，該信號控制點起到路由指令（如怎樣處理800 / 888對方付費電話）的集中化的數據庫的作用。

A program that will keep a centralized database of howto ' s for a help desk

該軟體維護一個集中式的幫助信息數據庫。

In distributed database system, it is not the centralized control of system but the site autonomy is emphasized. and the system should keep the data distributed, and then, the instance of data " s distributing can be ignored when program the application

在分散式數據庫系統中強調結點的自治性而不強調系統的集中控制，且系統應保持數據的分佈透明性，從而使應用程序編寫時可完全不考慮數據的分佈情況。

Follow defined workflow to best service customers and potential customers. all interactions with end users will be documented and tracked in centralized ticket tracking database

按照既定工作流程為所有現有客戶以及潛在客戶提供優質服務。與最終用戶之間的所有互動均被跟蹤並記錄在集中的跟蹤數據庫中。

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。