DatabaseDatabase FileFile SystemSystem An Alternative to Hierarchy Based File Systems Mohammad Anas Ramadan The Arab Academy of Banking an Financial Sciences Copyright © 2010 Mohammad Anas Ramadan 1 All rights reserved OutlineOutline ♦ Glossary ♦ The Problem ♦ A common solution ♦ Hierarchical File System ♦ Database File System - An overview ♦ Database File System - Internally ♦ Conclusion Copyright © 2010 Mohammad Anas Ramadan 2/17 All rights reserved GlossaryGlossary ♦ Daemon ♦ A Linux concept refers to a service or a program working in the background ♦ DBFS – Database File System ♦ An Alternative file system, based on database concepts ♦ Filter ♦ Set of search criteria for a file ♦ KDBFS – KDE Database File System ♦ An alternative KDE file manager, designed for Database File Syst em ♦ KDE - The K Desktop Environment ♦ An open -source desktop environment for Linux ♦ Konqueror ♦ The default KDE file manager, designed for Hierarchical File Sys tem ♦ HFS - Hierarchical File System ♦ The common structure of the current file systems, which consists of tree of files and folders ♦ Metadata ♦ Data about data, refers to the set of attribute about a certain file ♦ View ♦ A filter ’s output Copyright © 2010 Mohammad Anas Ramadan 3/17 All rights reserved Let ’s find a file … …or the enormous internet?! Local hard drive? Copyright © 2010 Mohammad Anas Ramadan 4/17 All rights reserved AA commoncommon solutionsolution…… ♦ A new kind of software emerged, to help user to store files and their metadata together in a one database. ♦ Something like: ♦ iTunes ♦ iPhoto ♦ Picasa ♦ But there are still limitations over there! Take a look … Copyright © 2010 Mohammad Anas Ramadan 5/17 All rights reserved Current Situation: Hierarchical File System (HFS) Copyright © 2010 Mohammad Anas Ramadan 6/17 All rights reserved HierarchicalHierarchical FileFile SystemSystem ♦ HFS ♦ Made to store things in some (reasonable) logical location . ♦ It only supports a few types of meta -data: ♦ file -name, file -type, file -size, modification -date... ♦ We need a File System ♦ Made to categorize and find things. Copyright © 2010 Mohammad Anas Ramadan 7/17 All rights reserved DatabaseDatabase FileFile SystemSystem –– AnAn overviewoverview ♦ It stores files without any restrictions. ♦ multiple files can be stored with the exact same meta -data. ♦ It is almost like storing all files in one directory, but withou t the need for unique names. ♦ So it's considered as faceted system ♦ Keywords can do what directories can and more. Copyright © 2010 Mohammad Anas Ramadan 8/17 All rights reserved DatabaseDatabase FileFile SystemSystem –– AnAn overviewoverview KDBFS ♦ 2 >> 5: Filter : Search or Query Copyright © 2010 Mohammad Anas Ramadan 9 ♦ 1: View : Filter ’s output /17 All rights reserved DatabaseDatabase FileFile SystemSystem –– AnAn overviewoverview Opening a File Saving a File Copyright © 2010 Mohammad Anas Ramadan 10 /17 All rights reserved DatabaseDatabase FileFile SystemSystem -- InternallyInternally Copyright © 2010 Mohammad Anas Ramadan 11 /17 All rights reserved DatabaseDatabase FileFile SystemSystem -- InternallyInternally ♦ The DBFS has been implemented as a daemon service for Unix -like systems, which integrates an SQL library and accepts connections from clients. ♦ The clients are the open -file and save -file dialogs in the open -source K Desktop Environment KDE , together with a standalone file manager, called KDBFS , which replaces Konqueror , the original KDE file manager. ♦ The daemon service is called dbfsd and runs in the background. ♦ It does not actually store files, ♦ It only stores references to files on the hierarchy based file s ystem. Copyright © 2010 Mohammad Anas Ramadan 12 /17 All rights reserved DatabaseDatabase FileFile SystemSystem -- InternallyInternally 100 90 80 70 60 50 Mouse Input Keyboard Input 40 Window Time 30 (Lowest is better) 20 10 0 HFS DBFS HFS DBFS Mouse Input 24.5 17.5 Keyboard Input 9.2 9.8 Window Time 93 78 Copyright © 2010 Mohammad Anas Ramadan 13 /17 All rights reserved Conclusion From Hierarchical File System … Copyright © 2010 Mohammad Anas Ramadan 14 /17 All rights reserved Conclusion To Database File System Copyright © 2010 Mohammad Anas Ramadan 15 /17 All rights reserved KeywordsKeywords insteadinstead ofof FoldersFolders Copyright © 2010 Mohammad Anas Ramadan 16 /17 All rights reserved ♦ Source : ♦ O. Gorter , Database File System: An Alternative to Hierarchy Based File Systems, University of Twente , August 2004. Copyright © 2010 Mohammad Anas Ramadan 17 /17 All rights reserved ThanksThanks forfor ListeningListening Copyright © 2010 Mohammad Anas Ramadan 18 /17 All rights reserved Copyright © 2010 Mohammad Anas Ramadan 19 /17 All rights reserved.