Chapter 9: File-System Interface
... Can simulate last two with first method by inserting appropriate control characters Who decides: Operating system Program / programmer ...
... Can simulate last two with first method by inserting appropriate control characters Who decides: Operating system Program / programmer ...
Slides
... Several pieces of data are needed to manage open files: File pointer: pointer to last read/write location, per process that has the file open File-open count: counter of number of times a file is open – to allow removal of data from open-file table when last processes closes it Disk location ...
... Several pieces of data are needed to manage open files: File pointer: pointer to last read/write location, per process that has the file open File-open count: counter of number of times a file is open – to allow removal of data from open-file table when last processes closes it Disk location ...
File Systems
... – How many i-nodes should a file system have? – How many direct and indirect blocks should an i-node have? – What is the “right” block size? ...
... – How many i-nodes should a file system have? – How many direct and indirect blocks should an i-node have? – What is the “right” block size? ...
UNIX---Operating System
... getting out (exit), listing files (ls) copying files (cp) removing files (rm) navigating the directory tree (cd) so on. ...
... getting out (exit), listing files (ls) copying files (cp) removing files (rm) navigating the directory tree (cd) so on. ...
Windows Vista system integrity technologies
... Recovering from CI failures Potential problems— OS won’t boot: kernel code or boot-time driver failed CI OS boots, a device won’t function: non-boot-time driver failed CI OS boots, system is “weird”: service failed CI OS boots and behaves, task malfunctions: OS component failed CI ...
... Recovering from CI failures Potential problems— OS won’t boot: kernel code or boot-time driver failed CI OS boots, a device won’t function: non-boot-time driver failed CI OS boots, system is “weird”: service failed CI OS boots and behaves, task malfunctions: OS component failed CI ...
Embedding Object Files in an Existing Operating System: A Practical Approach
... C++ was circumscribed by the need to demonstrate an efficient procedure of embedding object file model into a Non-Object-Oriented OS. Most of the available ObjectOriented languages rely on slow interpreters and require much run-time. Since C++ supports a minimalist view of Object-Oriented programmin ...
... C++ was circumscribed by the need to demonstrate an efficient procedure of embedding object file model into a Non-Object-Oriented OS. Most of the available ObjectOriented languages rely on slow interpreters and require much run-time. Since C++ supports a minimalist view of Object-Oriented programmin ...
Windows Vista system integrity technologies
... Recovering from CI failures Potential problems— OS won’t boot: kernel code or boot-time driver failed CI OS boots, a device won’t function: non-boot-time driver failed CI OS boots, system is “weird”: service failed CI OS boots and behaves, task malfunctions: OS component failed CI ...
... Recovering from CI failures Potential problems— OS won’t boot: kernel code or boot-time driver failed CI OS boots, a device won’t function: non-boot-time driver failed CI OS boots, system is “weird”: service failed CI OS boots and behaves, task malfunctions: OS component failed CI ...
Computer Forensics
... Analysis of Electronic Data – Based on the skill of the Computer Forensic Technologist Most Common Types of Evidentiary Data Visible Data – all data that the OS is presently aware of and thus is readily accessible to the user Data/Work Product Files – data from any software program. White Co ...
... Analysis of Electronic Data – Based on the skill of the Computer Forensic Technologist Most Common Types of Evidentiary Data Visible Data – all data that the OS is presently aware of and thus is readily accessible to the user Data/Work Product Files – data from any software program. White Co ...
Overview File Systems and
... notions of inferiority and superiority are not concerned with links, but only with branches. In a tree hierarchy of this kind, it seems desirable that a user be able to work in one or a few directories, rather than having to move about continually. It is thus natural for the hierarchy to be so arran ...
... notions of inferiority and superiority are not concerned with links, but only with branches. In a tree hierarchy of this kind, it seems desirable that a user be able to work in one or a few directories, rather than having to move about continually. It is thus natural for the hierarchy to be so arran ...
Programming Assignment 0
... ls -a (list all files in the working directory, including those starting with a period) ls -l -h (list files with detailed information like size, change time and access rights) man ls (Show the manual for the ls command. Type space to go to the next page. Type b to go to the previous page. Type q to ...
... ls -a (list all files in the working directory, including those starting with a period) ls -l -h (list files with detailed information like size, change time and access rights) man ls (Show the manual for the ls command. Type space to go to the next page. Type b to go to the previous page. Type q to ...
Flat Files and Relational Databases Presentation
... Different applications may hold the data in different forms, again causing a problem. If an extra field is needed in a file, all applications using that file have to be changed, even if they do not use that new item of data. ...
... Different applications may hold the data in different forms, again causing a problem. If an extra field is needed in a file, all applications using that file have to be changed, even if they do not use that new item of data. ...
Operating Systems File System File System File System Functions
... of E&IT, Warsaw University of Technology/* if it cannot be opened,Operating / File System – p. 6/37 out_fd = creat(argv[2], OUTPUT _MODE); /* create the destination file */ ...
... of E&IT, Warsaw University of Technology/* if it cannot be opened,Operating / File System – p. 6/37 out_fd = creat(argv[2], OUTPUT _MODE); /* create the destination file */ ...
Operating Systems
... • Your home directory is where you are located when you log in (e.g., /afs/umbc.edu/users/j/d/jdoe28). • The current directory is where you are located at any time while you are using the system. • Files within the same directory must be given unique names. • Paths allow us to give the same name to ...
... • Your home directory is where you are located when you log in (e.g., /afs/umbc.edu/users/j/d/jdoe28). • The current directory is where you are located at any time while you are using the system. • Files within the same directory must be given unique names. • Paths allow us to give the same name to ...
Oracle Database 10g: Administration Workshop I
... • Stripes files, but not logical volumes • Provides online disk reconfiguration and dynamic rebalancing • Allows for adjustable rebalancing speed • Provides redundancy on a per-file basis • Supports only Oracle database files • Is cluster aware • Is automatically installed ...
... • Stripes files, but not logical volumes • Provides online disk reconfiguration and dynamic rebalancing • Allows for adjustable rebalancing speed • Provides redundancy on a per-file basis • Supports only Oracle database files • Is cluster aware • Is automatically installed ...
H 10.1. File-System Interface
... A common technique for implementing file types is to include the type as part of the file name. The name is split into two parts-a name and an extension, usually separated by a period character. In this way, the user and the operating system can tell from the name alone what the type of a file is. F ...
... A common technique for implementing file types is to include the type as part of the file name. The name is split into two parts-a name and an extension, usually separated by a period character. In this way, the user and the operating system can tell from the name alone what the type of a file is. F ...
... Write: This test measures the performance of writing a new file. When a new file is written not only does the data need to be stored but also the overhead information for keeping track of where the data is located on the storage media. This overhead is called the “metadata” It consists of the direct ...
Chapter 10 File System Interface
... 2) Write – add data to file; usually OpSys maintains writepointer (wp) and data is written to current wp. Call minimally specifies buffer containing data to be written, file ID, sometimes more. 3) Read – read data from file; usually OpSys maintains readpointer (rp) and call reads from current r ...
... 2) Write – add data to file; usually OpSys maintains writepointer (wp) and data is written to current wp. Call minimally specifies buffer containing data to be written, file ID, sometimes more. 3) Read – read data from file; usually OpSys maintains readpointer (rp) and call reads from current r ...
ppt
... and later restored using readObject. Listing 16.12 stores an array of five int values an array of three strings, and an array of two JButton objects, and reads them back to display on the console. ...
... and later restored using readObject. Listing 16.12 stores an array of five int values an array of three strings, and an array of two JButton objects, and reads them back to display on the console. ...
Operating Systems and File Management
... To designate a file’s location, you must first specify the device where the file is stored The main hard disk usually is referred to as drive C ...
... To designate a file’s location, you must first specify the device where the file is stored The main hard disk usually is referred to as drive C ...
CLUE: Term sheet between Humpty Dumpty Eggs
... CLUE: New USB drive plugged in 7 days prior to Humpty’s death. Last plugged into the PC the morning of Humpty’s death. 2nd USB drive plugged in same day. ...
... CLUE: New USB drive plugged in 7 days prior to Humpty’s death. Last plugged into the PC the morning of Humpty’s death. 2nd USB drive plugged in same day. ...
ppt
... Building a program (continued) The linker puts together all object files as well as the object files in static libraries. The linker also takes the definitions in shared libraries and verifies that the symbols (functions and variables) needed by the program are completely satisfied. If there is sym ...
... Building a program (continued) The linker puts together all object files as well as the object files in static libraries. The linker also takes the definitions in shared libraries and verifies that the symbols (functions and variables) needed by the program are completely satisfied. If there is sym ...
Topic 1
... Building a program (continued) The linker puts together all object files as well as the object files in static libraries. The linker also takes the definitions in shared libraries and verifies that the symbols (functions and variables) needed by the program are completely satisfied. If there is sym ...
... Building a program (continued) The linker puts together all object files as well as the object files in static libraries. The linker also takes the definitions in shared libraries and verifies that the symbols (functions and variables) needed by the program are completely satisfied. If there is sym ...
Files and File Systems • files: persistent, named data objects – data
... Directories and File Names • A directory maps file names (strings) to i-numbers – an i-number is a unique (within a file system) identifier for a file or directory – given an i-number, the file system can file the data and meta-data the file • Directories provide a way for applications to group rela ...
... Directories and File Names • A directory maps file names (strings) to i-numbers – an i-number is a unique (within a file system) identifier for a file or directory – given an i-number, the file system can file the data and meta-data the file • Directories provide a way for applications to group rela ...
Slide 1
... Answer A for True and B for False 041200 A file specification is also called a path. 041300 Windows File Explorer is a file management utility. 041400 Hard disks, CDs, and DVDs are formatted into tracks and sectors. 041500 Time Machine is synchronization software used for backup on Macs. 0 ...
... Answer A for True and B for False 041200 A file specification is also called a path. 041300 Windows File Explorer is a file management utility. 041400 Hard disks, CDs, and DVDs are formatted into tracks and sectors. 041500 Time Machine is synchronization software used for backup on Macs. 0 ...
Computer file
A computer file is a resource for storing information, which is available to a computer program and is usually based on some kind of durable storage. A file is ""durable"" in the sense that it remains available for other programs to use after the program that created it has finished executing. Computer files can be considered as the modern counterpart of paper documents which traditionally are kept in office and library files, and this is the source of the term.