integration s remote file system abstractions

... this protocol is turned into a file system across the client-side file system and the file server The client-side file system tracks open files, and generally trans-lates application requests ... file sys-tem A simple client/server distributed file system has more components than the file systems we have studied so far On the client side, there are client applications which access files ... machines (and their users) unhappy and unproductive Thus, as the server goes, so goes the entire system Trang 448.4 Key To Fast Crash Recovery: StatelessnessThis simple goal is realized in NFSv2

Ngày tải lên: 16/08/2016, 19:10

... Trang 1Lab 8: Distributed File System -oOo - A YÊU C U: I M c tiêu: Distributed File System cho phép chúng ta t p trung các tài nguyên chia s trên máy ch ngoài ra v i tính ... Windows Windows Server 2003 Enterprise đã join vào mi n MaIT.vn Ü Ip Address : 192.168.10.2 Ü Subnet mask : 255.255.255.0 Ü Computer name : SERVER02 o Máy o 3 : Ü H H: Windows XP Professional đã ... v i user Administrator T o th m c chia s v i tên là TaiNguyen trên đ a D MaIT Education http://www.MaIT.vn Trang 32 Vào Administrative Tools å Distributed File System Trong h p tho i Distributed

Ngày tải lên: 17/12/2013, 04:15

... dịch vụ Distributed File System (DFS) trước bằng cách vào Server Manager -> Roles -> Add Roles Trong Select Server Roles bạn chọn File Services 2 of 20 Tại cửa sổ Select Role Services bạn chọn ... là File Server và Distributed File System Trong cửa sổ Create a DFS Namespace bạn chọn Create a namespace later using the DFS Management snap-in in Server Manager và tiến hành cài đặt 3 of 20 Sau ... chia sẻ này, tổng hợp tất cả các File Server này được gọi là Distributed File System (DFS). Như vậy với mô hình DFS khi có các yêu cầu truy cập tài nguyên từ bên ngoài vào DFS thì hệ thống sẽ tự

Ngày tải lên: 23/01/2014, 06:20

... memory-mapped files work For each mapped file,mapsdisplays the range of addresses in the process’s address space into which the file is mapped, the permissions on these addresses, the name of the file, ... “Process Memory Statistics.” n statuscontains lots of status and statistical information about the process, formatted to be comprehensible by humans Section 7.2.7, “Process Statistics,” contains ... (rw) This is the special /procfile system Notice that the first field,none, indicates that this file system isn’t associated with a hardware device such as a disk drive Instead, /proc is a window

Ngày tải lên: 26/01/2014, 07:20

... [26] is IBM’s high-performance shared-disk cluster file system GPFS achieves its extreme scalability through a shared-disk ar-chitecture Files are wide-striped across all disks in the file system ... as well as most of their remote attributes Furthermore, NFS/pNFS clients can access the cache and see the same view of the data (as defined by NFS consistency seman-tics) as NFS clients accessing ... the single-server design, which binds one network endpoint to all files in a file system, the back-end cluster file system is exported by a single NFS server or multiple independent NFS servers

Ngày tải lên: 19/02/2014, 18:20

... Write-anywhere file systems can capture snapshots, point-in-time copies of previous file system states, by preserving the file system images from past consistency points These snapshots are space efficient; ... consistent file system state with contents as of the last CP File systems that support journaling to stable storage . . Root Figure 1: File System as a Tree The conceptual view of a file system ... resulting RS’s are safely on disk When the system restarts after a failure, it is thus guaranteed that it finds a consistent file system with consistent back references at a state as of the last

Ngày tải lên: 19/02/2014, 18:20

... based file systems The end result is a file system which makes working with files a lot easier on the user Emphasis of this systems lies at the user and not the operating system, therefor files ... database is changed, the SQL query is run against the database A set of files is created from the results Trang 29Database File System Database File System — Internals of the database, this set is ... are also highly optimized, perhaps even more so then file systems Trang 122.1.2 Properties of Hierarchy Based File Systems URLs Using directories and files, hierarchy based file systems create

Ngày tải lên: 20/02/2014, 05:21

... của nó – Ví dụ, UNIX File System: “i-node” Trang 31VFS–Virtual File Systemdisk partition disk partition ext2 file system FAT file system NFS file system Ứng dụng VFS : gọi hàm/thủ tục open, read, ... log file (lúc này, file system có thể chưa được cập nhật) – Khi file system được cập nhật với đầy đủ mọi tác vụ trong transaction thì transaction sẽ được xóa đi trong log file. – Nếu file system ... thư mục chia sẻ  Nếu file /dict/w/list bị xóa ⇒ dangling pointer /spell/count Trang 22File-system mounting Để có thể truy xuất được, file system phải được gán lắp (mount)  File system cần được

Ngày tải lên: 15/03/2014, 09:20

... không nên bị cản trở bởi hoạt động các client khác Stateful và stateless: • Stateful là server lưu tất cả thông tin request từ client • Stateless là mỗi yêu cầu client phải cung cấp đầy đủ thông ... NameNode và danh sách các block thuộc về mỗi tập tin. Trang 19HDFS – Kiến trúc (4/10) NameNode cũng lưu trữ nhật ký sửa đổi của image gọi là journal trong native file system của các host cục bộ. 19 ... ngẫu nhiên trên • Các bản sao khác có thể sắp đặt ngẫu nhiên  Client sẽ đọc bản sao gần nhất. 15 Trang 16HDFS – Kiến trúc (1/10) NameNode (master): • Quản lý namespace của hệ thống tập tin

Ngày tải lên: 07/04/2014, 21:03

... 1THE GOOGLE FILE SYSTEMTrang 3GOOGLE FILE SYSTEMTrang 5Giới thiệu về GFS (cont.)• Chỉ được sử dụng bởi Google • Không phải là một sản phẩm open source • Được xem như là một mô hình về DFS Trang 6KIẾN ... trúcTrang 11Single master server• Đơn giản việc quản lý ▫ Tối thiểu hóa vai trò của master  Chỉ được dùng cho metadata.  Tăng kích thước chunk size.  Lease mechanism. Trang 13• Tên file và chunk ... phát sinh ra read request 2 GFS client phiên dịch request đó và gửi cho master 3 Master trả về chunk handle và vị trí của một trong các replica cho GFS client Trang 19Read (cont.)4 Client sử dụng

Ngày tải lên: 07/04/2014, 21:17

... concludes with a sum-mary of some evaluations of file systems and transaction processing systems Chapter 3 presents a simulation study of several read-optimized file system designs Thesimulation uses ... Evaluations This section summarizes several evaluation studies that include file system transaction port, operating system transaction systems, and operating system support for database manage-ment systems ... read-optimized file systems are divided into two categories: fixed-blocksystems and extent-based systems Fixed-block systems allocate files as collections of identicallysized blocks while extent-based systems

Ngày tải lên: 28/04/2014, 13:32

... entirely new level Plus, my inclination is to giveyou as many tools as possible so that you will have the greatest probabili-ties of success in designing a successful risk control system time-The two ... univer-One of the most dangerous and common misuses of candles is trying to use them as a stand-alone trading vehicle This is wrong Candles are atool, not a trading system This is why I also show how to ... is likely to, achieve profits or losses similar to thosediscussed pro-xiii Trang 17xivTrang 18I N T R O D U C T I O NThis Is My Money Management System This book, a Trader’s Money Management System

Ngày tải lên: 03/05/2014, 12:53

... file system Trang 25File system mounting (2) Trang 26File system mounting (3) Users jane prog Sau khi mount, có thể truy cập các file trong partition /dev/hda3 Trang 27Chia sẻ file ... normal; 1 for do not display in listings System flag O for normal files; 1 for system file Archive flag O for has been backed up; 1 for needs to be backed up Lock flags O for unlocked; nonzero ... thống file (file system) HH Giao đieãn heã thodang file — Các yêu cầu của người dùng — File — Thư mục — File system mounting — Chia sé & bao vệ Trang 2Các yêu cầu của người dùng Trang 3Sự

Ngày tải lên: 13/05/2014, 00:22

... access rights Trang 35File Sharing – Remote File Systems Uses networking to allow file system access between systems  Manually via programs like FTP  Automatically, seamlessly using distributed ... 10: File-System InterfaceTrang 2Chapter 10: File-System InterfaceTrang 3 To explain the function of file systems  To describe the interfaces to file systems  To discuss file-system design ... multi-user systems is desirable  Sharing may be done through a protection scheme  On distributed systems, files may be shared across a network  Network File System (NFS) is a common distributed file-sharing

Ngày tải lên: 13/05/2014, 00:36

... Virtual File System (VFS) layer – distinguishes local files from remote ones, and local files are further distinguished according to their file-system types  The VFS activates file-system-specific ... newer file systems (I.e Veritas File System) use a modified contiguous allocation scheme  Extent-based file systems allocate disk blocks in extents  An extent is a contiguous block of disks  ... specification of a software system for accessing remote files across LANs (or WANs)  The implementation is part of the Solaris and SunOS operating systems running on Sun workstations using an unreliable

Ngày tải lên: 13/05/2014, 00:36

... Hành NTFS NTFS (New Technology File System) I Mục đích sử dụng - Hiểu đặc điểm hệ thống file NTFS thuận lợi, khả bảo mật NTFS cung cấp cho người dùng - Phân quyền folfer file cho user - Chia sẻ folder ... Nén file/folder, mã hoá file dùng dịch vụ Windows II Công cụ sử dụng - Các công cụ hỗ trợ hệ thống quản lý file NTFS Windows III Các bước cấu hình Giới thiệu NTFS So với FAT32 hệ thống file NTFS ... nén liệu (Compression) cấu hình disk quotas (các hạn ngạch dành cho ổ cứng)  Cho phép mã hoá file liệu ổ cứng vật lý dùng dịch vụ mã hoá EFS (Encrypting File System) hỗ trợ Windows nhằm bảo mật

Ngày tải lên: 08/08/2014, 08:22

... Checksum/ECC ext2 Yes Yes No Yes Yes Unknow n Yes No Yes[54] Yes[54] Yes No ext4 Yes Yes Yes Yes Yes Unknow n Yes No Yes[54] Yes[54] Yes Partial [55] Trang 28File system Hard links Symbolic links Block journalin ... Checksum/ECC ext2 Yes Yes No Yes Yes Unknow n Yes No Yes[54] Yes[54] Yes No ext4 Yes Yes Yes Yes Yes Unknow n Yes No Yes[54] Yes[54] Yes Partial[55] Trang 27Last access/ read timestampsLast content modification ... ext4 256 bytes Any byte except NUL and / No limit defined 16 TiB 1 EiB Trang 26File system Stores file owner POSIX file permissions Creation timestamps Last access/ read timestamps Last content

Ngày tải lên: 11/08/2015, 23:54

... ofsteganographic file systems This model divides the activity space of a file systeminto secure and insecure domains, and defines the objective of steganographic filesystem as preventing adversaries from ... most file systems rely on user access control, which is enforced by operatingsystems, to protect data from unauthorized accesses, the functions of user accesscontrol is limited by particular system ... cryptographic filesystems designed for remote file servers, such as TCFS (transparent cryptographicFS) [47, 20], CryptFS [71], SFS (Self-certifying FS) [48] As their functions aresimilar to that of CFS,

Ngày tải lên: 16/09/2015, 15:54

... FILE SYSTEM FIGURE 1: DISK STRUCTURE A FAT16 file system stores data in sectors A sector size of 512 bytes is common Since the number of available memory addresses is capped at FFFFh, sectors ... SetClockVars This API sets the timing variables used to set file create/modify/access times This function is only used when the user-defined Clock mode is selected Syntax int SetClockVars (unsigned ... FSfclose This API closes an opened file Syntax int FSfclose( FSFILE *stream ) Parameters stream – A pointer to a FILE structure obtained from a previous call of FSfopen Return Values Returns...

Ngày tải lên: 11/01/2016, 16:37

... systems are composed of many small files A uniformly large block size wastes space Table shows the effect of file system block size on the amount of wasted space in the file system The files measured ... file system) , each disk drive is divided into one or more partitions Each of these disk partitions may contain one file system A file system never spans multiple partitions.† A file system is described ... processor Each file system is parameterized so that it can be adapted to the characteristics of the disk on which it is placed For mass storage devices such as disks, the new file system tries to...

Ngày tải lên: 12/09/2012, 14:16