concurrent write 中文意思是什麼

concurrent write 解釋
并行寫操作
  • concurrent : adj 1 同時發生的,並發的,並存的,共存的;合作的。2 (意見)一致的。3 【動物;動物學】趨合的;【...
  • write : vt (wrote 〈古語〉 writ; written 〈古語〉 writ)1 寫,記,錄,抄,謄;填寫;簽發;簽訂;簽署。2 ...
  1. Given a scenario, write code that makes appropriate use of object locking to protect static or instance variables from concurrent access problems

    在給定的條件下,寫出正確使用對象鎖保護靜態或實例變量不會產生並發訪問問題的代碼
  2. In the server environment, where multiple concurrent operations are performed, this performance cost is reduced by group commit, which combines multiple synchronous write operations into a single write operation

    在執行多個并行操作的服務器環境中,通過將多個同步寫操作組合成單一寫操作的組提交來減少這種性能損失。
  3. This module is in charge of the form and organization of the log record, log page and log file. this module is also used to control the concurrent access of the log records and provides rapid read / write to the upper level

    日誌管理模塊設計日誌記錄、日誌頁以及日誌文件的格式和組織方法;該模塊同時管理多個服務線程對日誌記錄的並發訪問,並且向上層提供快速讀寫日誌的介面。
  4. 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。
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