file system storage and local databases

File System Performance and Transaction Support

Ngày tải lên : 28/04/2014, 13:32

... 1100 File 3: 1000 Level Entry Map Data blocks File 4: 1100 File 5: 0011 File 6: 0001 File 1: 1101 File 1: 0001 File 1: 1111 File 2: 1100 File 2: 1001 File 2: 1000 File 5: 0011 File 5: 1111 File ... IBM’s Extent Based File System 3 3 2.1.1.2 The UNIX1 V7 File System 2.1.1.3 The UNIX Fast File System 2.1.1.4 Extent-like Performance on the Fast File System 2.1.1.5 ... multiple-block-sized systems and one ﬁxed-block system The multiple-block-sized systems analyzed are an extent-based system similar to IBM’s MVS system, a binary buddy system similar to DTSS [KOCH87], and a...

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The Design and Implementation of a Log-Structured File System

Ngày tải lên : 12/09/2012, 15:05

... between Sprite LFS and Unix FFS This example shows the modified disk blocks written by Sprite LFS and Unix FFS when creating two single-block files named dir1 /file1 and dir2 /file2 Each system must write ... Sprite LFS Related work The log-structured file system concept and the Sprite LFS design borrow ideas from many different storage management systems File systems with log-like structures have appeared ... ‘‘SWALLOW: A Distributed Data Storage System for a Local Network,’’ Local Networks for Computer Communications, pp 355-373 North-Holland, (1981) 18 John K Ousterhout, Andrew R Cherenson, Frederick...

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LƯU TRỮ VÀ CẤU TRÚC TẬP TIN (Storage and File Structure)

Ngày tải lên : 15/09/2012, 09:38

... cận để ánh xạ CSDL đến file sử dụng số file, lưu trữ mẩu tin thuộc độ dài cố định vào file cho Một cách khác cấu trúc file cho ta điều tiết nhiều độ dài cho mẩu tin Các file mẩu tin độ dài cố ... chức file đống (Heap File Organization) Trong tổ chức này, mẩu tin lưu trữ nơi file, có không gian cho Không có thứ tự mẩu tin Một file cho quan hệ • Tổ chức file ( Sequential File Organization) ... A-217 A-301 550 • file mẩu tin account Trong phần này, ta giả thiết tất file thứ tự khoá tìm kiếm Các file vậy, với mục sơ cấp khoá tìm kiếm này, gọi file mục (index-sequential files) Chúng biểu...

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File System and Disk Administration

Ngày tải lên : 28/09/2013, 11:20

... dùng lệnh newfs), mkswap tạo swap file system Ví dụ mke2fs /dev/hda1 mkswap /dev/hda2 Mounting and unmounting file systems Mounting file systems Nh ta biêt hệ thống file UNIX đợc lu trữ dới dạng ... dùng Linux ext2 Kiểu filesystem đợc dùng chủ yếu Linux partition iso9660 Kiểu ISO 9660 filesystem đợc dùng với CD-ROM disks sysv Kiểu Nhằm hỗ trợ cho dạng UNIX System V filesystem msdos Kiểu ... 481998 15 457087 0% /local 222422 218310 50% /var/spool/mail server1:/var/spool/mail 489702 Các cột thông tin gồm: Filesystem Chỉ file system 1024-blocks Chỉ số block file system (Tổng dung lợng.)...

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File system and Disk Administration

Ngày tải lên : 09/10/2013, 13:20

... lệnh newfs), mkswap tạo swap file system Ví dụ mke2fs /dev/hda1 mkswap /dev/hda2 Mounting and unmounting file systems Mounting file systems Như ta đ biêt hệ thống file UNIX lưu trữ dạng thư mục ... Kiểu filesystem dùng chủ yếu Linux partition ỹ iso9660 Kiểu ISO 9660 filesystem dùng với CD-ROM disks 76 Giới thiệu UNIX- Một số thao tác UNIX ỹ sysv Kiểu Nhằm hỗ trợ cho dạng UNIX System V filesystem ... 481998 15 457087 0% /local 222422 218310 50% /var/spool/mail server1:/var/spool/mail 489702 Các cột thông tin gồm: ỹ Filesystem Chỉ file system ỹ 1024-blocks Chỉ số block file system (Tổng dung...

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Navigating the Windows 2000 File System with “Windows Explorer” and “My Computer”

Ngày tải lên : 04/11/2013, 16:15

... 2000 file system using Windows Explorer Right-click the My Computer icon on the desktop or right-click the Start button and select Explore from the menu Locate the local Disk C:\” icon and click ... contents of the Documents and Settings folder Within this folder, locate the Administrative and All User folder Reflection There are various ways to navigate and to locate files and folders What is ... the Local Disk (C:)” icon to display the contents of the C:\ drive Change the view to details again if it is necessary to see the file information Locate the “Documents and Settings” folder and...

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Báo cáo sinh học: " Novel data storage for H.264 motion compensation: system architecture and hardware implementation" pdf

Ngày tải lên : 18/06/2014, 22:20

... Science and Technology in Flanders (Agentschap voor Innovatie door Wetenschap en Technologie 23 in Vlaanderen) for funding the Vampire project and Alcatel Lucent-Bell (ALU) for ﬁnancial and technical ... in preceding standards The better performance however also brings higher requirements for computational complexity and memory access This article describes a novel data storage and the associated ... image sizes and frame rates The hardware implementation of a stand alone H.264 q-pel MC on FPGA has shown speeds between 95.9 fps for HD1080p frames, 229 fps for HD 720p and between 2502 and 12623...

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báo cáo hóa học:" Novel data storage for H.264 motion compensation: system architecture and hardware implementation" doc

Ngày tải lên : 20/06/2014, 04:20

... Science and Technology in Flanders (Agentschap voor Innovatie door Wetenschap en Technologie 23 in Vlaanderen) for funding the Vampire project and Alcatel Lucent-Bell (ALU) for ﬁnancial and technical ... in preceding standards The better performance however also brings higher requirements for computational complexity and memory access This article describes a novel data storage and the associated ... image sizes and frame rates The hardware implementation of a stand alone H.264 q-pel MC on FPGA has shown speeds between 95.9 fps for HD1080p frames, 229 fps for HD 720p and between 2502 and 12623...

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Báo cáo toán học: " Novel data storage for H.264 motion compensation: system architecture and hardware implementation" pot

Ngày tải lên : 20/06/2014, 21:20

... frames) The performance in a system using both P and B frames will be lower than in a system that only uses P frames A system that can perform the proposed method on P and B frames is reserved for ... dual-standard VLSI Architecture for MC Interpolation in AVS and H.264 1-4244-0920-9 IEEE International Symposium on Circuits and Systems, ISCAS 2007 Zhang N-R, Li M, Wu W-C: High performance and ... Science and Technology in Flanders (Agentschap voor Innovatie door Wetenschap en Technologie in Vlaanderen) for funding the Vampire project and Alcatel Lucent-Bell (ALU) for financial and technical...

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Báo cáo hóa học: " Research Article LCMV Beamforming for a Novel Wireless Local Positioning System: Nonstationarity and Cyclostationarity Analysis" doc

Ngày tải lên : 22/06/2014, 19:20

... transponder and transponder average speed for a system with (uniform linear array with elements and half wavelength element spacing) and (transponder bandwidth of 8.33 MHz) and (b) transponder bandwidth ... wireless local positioning system with a periodic signaling structure Diﬀerent from standard wireless systems, the standard sample covariance matrix estimator is not consistent in the WLPS system ... REFERENCES [1] H Tong and S A Zekavat, “LCMV beamforming for a novel wireless local positioning system: a stationarity analysis,” in Sensors, and Command, Control, Communications, and Intelligence...

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Báo cáo khoa học: "Effects of buffer system pH and tissue storage on starch gel electrophoresis of allozymes in three tropical tree species" pps

Ngày tải lên : 08/08/2014, 23:22

... Cheliak and Pitel and Liengsiri et al (1990a) with minor modifications zymes (1984) were Effect of tissue storage conditions and freezing periods In this experiment, tissue storage conditions and storage ... buffer system, zones of activity (Pgi#1 and Pgi#2) were observed The R were 0.30 and 0.18 for both Ra’s f cosperma species When the B buffer Effect of tissue storage conditions and storage ... assess the effects of extraction buffers, buffer systems, and conditions of material storage and handling on the activity of a number of enzyme systems, ideally in a factorial design Furthermore,...

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Remote and local file inclusion explained

Ngày tải lên : 20/05/2015, 05:17

... away from RFI and LFI As you can see, you can dramatically expound upon each method LFI LFI is a Local File Inclusion This is when you find a particular file within a database and uses it against ... successfully executed, and two – you are given the option to execute commands Might I suggest the classic whoami command Much may be explored from here, and so we have reverted and made a full circle ... the file that is being exploited, ? is to allow us to tweak the so called blind file to make base _ path (the variable) to equal another file elsewhere The text.txt will be parsed with the command...

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Network storage system simulation and performance optimization

Ngày tải lên : 26/11/2015, 22:57

... Servers Storage Area Network Switch Fabric Blocked Storage Systems Figure 3.1 Storage System for SAN and NAS 14 storage systems, characterized by high bandwidth, dedicated connection and great ... the RAID storage system [8], and the storage system has become a cornerstone of the entire data storage industry Among other factors in a storage system, the interconnection between the storage ... of storage systems and investigates the current status of research in FC-AL network storage systems Chapter conducts operational analysis on FC-AL based storage systems and presents the Command-First...

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Locality and The Fast File System

Ngày tải lên : 16/08/2016, 18:50

... the file system (the same APIs, including open(), read(), write(), close(), and other file system calls) but changing the internal implementation, the authors paved the path for new file system ... file /foo/bar.txt and that the file is one block long (4KB) The file is new, and thus needs a new inode; thus, both the inode bitmap and the newlyallocated inode will be written to disk The file ... to design the file system structures and allocation policies to be “disk aware” and thus improve performance, which is exactly what they did FFS thus ushered in a new era of file system research;...

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File system and disk administration

Ngày tải lên : 19/10/2016, 22:56

... mkswap tạo swap file system mke2fs /dev/hda1 mkswap /dev/hda2 2/8 File System and Disk Administration Mounting and unmounting file systems Mounting file systems Như ta biêt hệ thống file UNIX lưu ... /data ext2 defaults 1 4/8 File System and Disk Administration Một số kiểu hay dùng Linux • • • • • ext2 Kiểu filesystem dùng chủ yếu Linux partition iso9660 Kiểu ISO 9660 filesystem dùng với CD-ROM ... 481998 15 457087 0% /local server1:/var/spool/mail 489702 222422 218310 50% /var/spool/mail Các cột thông tin gồm: • • • • Filesystem Chỉ file system 1024-blocks Chỉ số block file system (Tổng dung...

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EMBEDDED LINUX SYSTEM DESIGN AND DEVELOPMENT.pdf

Ngày tải lên : 04/08/2012, 14:23

... 4.8 Embedded File Systems 116 4.8.1 Ramdisk 117 4.8.2 RAMFS 117 4.8.3 CRAMFS (Compressed RAM File System) 117 4.8.4 Journaling Flash File Systems — JFFS and JFFS2 ... Ⅲ Understand the embedded Linux development environment Ⅲ Understand and create Linux BSP for a hardware platform Ⅲ Understand the Linux model for embedded storage and write drivers and applications ... control and target communication Ⅲ COGNITO: COGNITO is a graphical system browser for the analysis of system runtime behavior and includes the collection, storage, and display of all system parameters...

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A Fast File System for UNIX

Ngày tải lên : 12/09/2012, 14:16

... SMM:05-2 A Fast File System for UNIX TABLE OF CONTENTS Introduction Old file system New file system organization 3.1 Optimizing storage utilization 3.2 File system parameterization 3.3 ... [Smith81b] Smith, A "Bibliography on File and I/O System Optimization and Related Topics", Operating Systems Review, 15, Oct 1981 pp 39-54 [Symbolics81] "Symbolics File System" , Symbolics Inc, 9600 DeSoto ... multiple file systems * The actual number may vary from system to system, but is usually in the range 5-13 SMM:05-4 A Fast File System for UNIX reorganized the data on the disk to restore locality...

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Windows 2003 EFS EFS (Encrypting File System)

Ngày tải lên : 14/09/2012, 09:57

... “Cipher.exe” cửa sổ DOS – Prompt TASK 3F-1 Encryting Files Tại phân vùng NTFS, tạo text document với tên Mine.txt số văn Mở Explorer, hiển thị thuộc tính file Mine.txt Click Advanced, check vào Encrypt ... chắn” cho certificate lưu giữ nơi an toàn Để giữ nguyên thuộc tính liệu, sử dụng Backup Utility (System Tools.Backup) để chép, di chuyển tập tin, thư mục mã hóa EFS Cryptography EFS sử dụng kết ... khóa public key/private key (thông tin mã hóa public key giải mã private key)và khóa mã hóa FEK (file encryption key) để mã hóa giải mã liệu Khi người dùng mã hóa tập tin, EFS tạo FEK để mã hóa...

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Xây dựng hệ thống thông tin quản lý công văn tại Trung tâm Hệ thống Thông tin Viễn thông - Chính phủ FPT Information System Telecom and Government FIS TEG

Ngày tải lên : 15/12/2012, 11:21

... thông tin quản lý công văn Trung tâm Hệ Thống Thông Tin Viễn thông_Chính phủ FPT Information System Telecom and Goverment FIS TEG” thực hiện, giúp hoàn thiện thêm cho phần mềm có Ngoài phần khác, ... học TP HCM trao giải 2.Trung tâm hệ thống thông tin Viễn Thông Chính phủ FPT Information System Telecom and Government FIS TEG Trung tâm hệ thống thông tin (HTTT) Viễn thông _Chính phủ FIS TEG ... 13 2.1 Sơ đồ tổ chức Trung tâm hệ thống thông tin Viễn thông_Chính phủ FPT Information System Telecom and Government FIS TEG FIS TEG Toàn Quốc FIS TEG Hà Nội Kinh Doanh Triển Khai Đảm Bảo FIS...

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