logic file system 中文意思是什麼
logic file system
解釋
邏輯文件系統-
Through the implementing of kernel level file and cache mechanism at the client side, this newly proposed distributed network file system provides seamless network file access and reduces the performance decline caused by network transmission. utilizing the concept of logic block server, it provides the reliable data block storage and implements redundant storage capacity. utilizing the concept of the index server, it provide s the cost of the greatly for server and network during data access process and realizes the computing with balancing capacity
在客戶端通過實現內核級文件的調用和緩沖機制，實現了文件的無縫網路存取，並減少由於網路傳輸帶來的性能下降的影響；利用邏輯塊服務器實現邏輯塊的冗餘存取，實現數據塊的安全存放；利用索引服務器進行負載均衡計算，實現資料存取的較低網路和服務器開銷；利用索引服務器實現服務器組的零管理，使該系統具有高效性、穩定性和可伸縮性。 -
There are three layers in deltafile, virtual file system 、 logic file system and buffer cache. besides, deltafile provides the posix api interface
為了對用戶透明的實現多種不同文件系統支持的功能， deltafile中採用了虛擬文件系統和邏輯文件系統相分離的體系結構。 -
First it supports the system call interfaces complied with the posix standard, which make convenience to the porting process to delta os for applications. second, delta file 3. 0 offers the entire supports to the fat logic file system format, and make it suitable in multitasks environment through technique process. once more, delta file 3. 0 support the flexible virtual file system interface and drive manage interface to make update easier
首先，其系統調用介面遵循posix規范，以便於應用向deltaos進行移植;其次， deltafile3 . 0提供了對fat全系列邏輯文件系統格式（含fat12 、 fat16 、 fat32 ）的完全支持，並通過改造將fat這種源於單任務操作系統dos的文件系統標準應用於多任務環境;此外， deltafile3 . 0提供了靈活的虛擬文件系統介面和設備驅動管理介面，便於未來的升級和擴展。 -
In the system realize part, the paper listed the system diagram and system logic diagram, introduced the method of building system kernel and building file system, detailed analysised the network code and the ip packets filter code. after that, the paper showed the realize of the graphical interfaces and gave us the example application ; finally the paper presened the process and the result of test, including the equipment, related standard, environment and the measures
在系統實現部分，本文列出了系統框圖及邏輯框圖，介紹了構建系統內核及文件系統的方法，對網路部分的代碼和數據包過濾部分的代碼都進行了詳細的分析，並對圖形化界面的實現進行了描述，給出了圖形化界面的實例應用；最後對所實現的安全網關的性能作出了分析，包括對測試設備和相關標準的介紹，測試的環境與方法，給出了測試結果。 -
Base on the analysis of comparison to current file systems, this thesis proposes new distributed network file system architecture on the tcp / ip protocol. the newly proposed file system is a three - layer architecture including clients, index servers and logic block servers
本文在分析現有的網路文件系統的基礎上，提出一種基於tcp ip的分散式網路文件系統結構，即以客戶端、索引服務器和邏輯塊服務器為基礎的三層結構。 -
The goal we must achieve, when designing distributed parallel file system, was analyzed also. the thesis present the logic structure of dpfs, the structure and the flush strategy of the module of directory cache and its role in the read - write operation, duplicate table ' s physical and logical structure, the management and synchronization algorithm of the duplicate table, and the model and the management algorithm of the module of intelligent duplicate management. also the effects that dpfs exerts to the system reliability and the read and write performance compared to ext2 were analyzed
本文首先介紹了數據存儲的發展概況與新的需求，分散式文件系統對其發展的重要影響以及設計分散式文件系統需要考慮的各種問題；然後分析了為滿足分散式并行服務器的功能需求， dpfs應實現的目標；接著介紹了dpfs設計的總體邏輯結構，目錄緩存管理模塊的結構設計、刷新策略以及該模塊在文件讀寫重定向中的作用，副本表的邏輯、物理結構、對其緩存的管理和同步演算法的實現，以及副本智能管理的設計模型及其管理演算法的設計與實現，還分析了dpfs對系統可靠性的影響以及在讀寫文件時與ext2文件系統性能的比較。 -
The kernel of the file system is composed of two parts : the virtual file system and the logic file systems
這樣就為用戶程序提供了一個統一的、抽象的、虛擬的文件系統介面。
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