Operating Systems
... Guarantee that the data in the file are valid Optimize performance Provide I/O support for a variety of storage device types • Minimize lost or destroyed data • Provide a standardized set of I/O interface routines to user processes • Provide I/O support for multiple users (if needed) ...
... Guarantee that the data in the file are valid Optimize performance Provide I/O support for a variety of storage device types • Minimize lost or destroyed data • Provide a standardized set of I/O interface routines to user processes • Provide I/O support for multiple users (if needed) ...
CENG334 Introduction to Operating Systems
... Identifier – unique tag (number) identifies file within file system Type – needed for systems that support different types Location – pointer to file location on device Size – current file size Protection – controls who can do reading, writing, executing Time, date, and user identification – data fo ...
... Identifier – unique tag (number) identifies file within file system Type – needed for systems that support different types Location – pointer to file location on device Size – current file size Protection – controls who can do reading, writing, executing Time, date, and user identification – data fo ...
Windows Server 2008
... • Cylinders – tracks that line up on each platter from top to bottom and are all read at the same time • Data regarding block allocation is stored using one of two techniques: – File allocation table (FAT) – New Technology File System (NTFS) and Unix/Linux file systems – uses various locations on th ...
... • Cylinders – tracks that line up on each platter from top to bottom and are all read at the same time • Data regarding block allocation is stored using one of two techniques: – File allocation table (FAT) – New Technology File System (NTFS) and Unix/Linux file systems – uses various locations on th ...
V. Filesystems and Mass Storage
... In memory for FS management and performance. Data loaded at mount time: – Mount table storing file system mounts, mount points, file system types – Copy of the directory structure of recently accessed directories – System-wide open-file table: copy of FCB of open files – Buffers hold FS blocks when ...
... In memory for FS management and performance. Data loaded at mount time: – Mount table storing file system mounts, mount points, file system types – Copy of the directory structure of recently accessed directories – System-wide open-file table: copy of FCB of open files – Buffers hold FS blocks when ...
No Slide Title
... Establish logical names on the network Establish logical connections of sessions between two logical names on the network Support reliable data transfer for a session via NetBIOS requests or SMBs ...
... Establish logical names on the network Establish logical connections of sessions between two logical names on the network Support reliable data transfer for a session via NetBIOS requests or SMBs ...
VIII. Input/Output
... SCSI, ...) • Host controller (in computer) talks to disk controller (in device) via this bus ...
... SCSI, ...) • Host controller (in computer) talks to disk controller (in device) via this bus ...
File systems in Windows
... in Windows the file system is part of the I/O system. the I/O manager provides device independent I/O facilities, in our case Either the file manipulation facilities that are independent of the hardware of the physical device the file data is stored on or the type of the file system that is used to ...
... in Windows the file system is part of the I/O system. the I/O manager provides device independent I/O facilities, in our case Either the file manipulation facilities that are independent of the hardware of the physical device the file data is stored on or the type of the file system that is used to ...
5_disk_scheduling
... • Swap-space can be carved out of the normal file system, or, more commonly, it can be in a separate disk partition • Swap-space management – 4.3BSD allocates swap space when process starts; holds text segment (the program) and data segment – Kernel uses swap maps to track swap-space use – Solaris 2 ...
... • Swap-space can be carved out of the normal file system, or, more commonly, it can be in a separate disk partition • Swap-space management – 4.3BSD allocates swap space when process starts; holds text segment (the program) and data segment – Kernel uses swap maps to track swap-space use – Solaris 2 ...
files
... disks in units called files • The information in files must be persistent – that is not affected by creation/destruction of processes • These files must be managed by the OS • The part of the OS that handles this is called the file system ...
... disks in units called files • The information in files must be persistent – that is not affected by creation/destruction of processes • These files must be managed by the OS • The part of the OS that handles this is called the file system ...
Providing Dynamic Update in an Operating System
... In addition to the above mentioned impact on availability, dynamically updatable systems have other benefits. Such systems provide a good prototyping environment. They allow, for example, a new page replacement, file system, or network policy to be tested without rebooting. Further, in more mature s ...
... In addition to the above mentioned impact on availability, dynamically updatable systems have other benefits. Such systems provide a good prototyping environment. They allow, for example, a new page replacement, file system, or network policy to be tested without rebooting. Further, in more mature s ...
Operating Systems - Lecture #5: File Management
... Responsibilities of the file manager 1 Keep track of where each file is stored 2 Use a policy that will determine where and how the files will be stored, making sure to efficiently use the available storage space and provide efficient access to the files. 3 Allocate each file when a user has been ...
... Responsibilities of the file manager 1 Keep track of where each file is stored 2 Use a policy that will determine where and how the files will be stored, making sure to efficiently use the available storage space and provide efficient access to the files. 3 Allocate each file when a user has been ...
Operating Systems and File Management 4 Operating System
... 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 ...
Project Description Userspace Deduplication File System using FUSE
... using the FUSE [2] file system framework within the Linux operating system environment. You will NOT be using xv6 for this project. This will enable us to use it just like any other file system, but will allow us to code and debug it as a userspace program. Figure 1 illustrates the high-level archit ...
... using the FUSE [2] file system framework within the Linux operating system environment. You will NOT be using xv6 for this project. This will enable us to use it just like any other file system, but will allow us to code and debug it as a userspace program. Figure 1 illustrates the high-level archit ...
SOE Build Guidelines - Windows v3.0
... taken. This requirement does not apply where the software updating is an essential part of the “service” being provided by the application, e.g. Anti-Virus software. 4. Do not install any form of “value adding” software, such as browser toolbars or helpers, unless they are explicitly required. Wher ...
... taken. This requirement does not apply where the software updating is an essential part of the “service” being provided by the application, e.g. Anti-Virus software. 4. Do not install any form of “value adding” software, such as browser toolbars or helpers, unless they are explicitly required. Wher ...
Operating Systems
... Magnetic disks provide bulk of secondary storage of modern computers – Drives rotate at 60 to 200 times per second – Transfer rate is rate at which data flow between drive and computer – Positioning time (random-access time) is time to move disk arm to desired cylinder (seek time) and time for desir ...
... Magnetic disks provide bulk of secondary storage of modern computers – Drives rotate at 60 to 200 times per second – Transfer rate is rate at which data flow between drive and computer – Positioning time (random-access time) is time to move disk arm to desired cylinder (seek time) and time for desir ...
31 zNibbler zOS Control Blocks
... Control blocks are used in z/OS to manage the work and resources of the system. They are represented internally as real, virtual and hard storage areas containing specific information pertaining to events, activity and status occurring within the infrastructure’s operation. Control blocks in most si ...
... Control blocks are used in z/OS to manage the work and resources of the system. They are represented internally as real, virtual and hard storage areas containing specific information pertaining to events, activity and status occurring within the infrastructure’s operation. Control blocks in most si ...
A 3D geo database based on CityGML
... can be found. CityGML supports a subset of GML’s geometry model comprising mainly polygonal geometries: Surfaces, CompositeSurfaces, MultiSurfaces, Solids etc., all of which may be assigned appearance information. This subset facilitates various ways of composing spatial entities, including nesting ...
... can be found. CityGML supports a subset of GML’s geometry model comprising mainly polygonal geometries: Surfaces, CompositeSurfaces, MultiSurfaces, Solids etc., all of which may be assigned appearance information. This subset facilitates various ways of composing spatial entities, including nesting ...
AERC_StorSafe_launch_release_local_
... AERC maintains a Zero-Waste-to-Landfill Policy for all of its hazardous electronics/ electrical recycling services. AERC operates five Electronics Processing facilities, also known as Com-Cycle, in five separate geographic locations. The AERC/Com-Cycle facility in West Melbourne, FL is a Certified E ...
... AERC maintains a Zero-Waste-to-Landfill Policy for all of its hazardous electronics/ electrical recycling services. AERC operates five Electronics Processing facilities, also known as Com-Cycle, in five separate geographic locations. The AERC/Com-Cycle facility in West Melbourne, FL is a Certified E ...
File Systems - Personal Web Pages
... Files are identified by their characteristics, - type of file, - topic, - author, - or metadata. ...
... Files are identified by their characteristics, - type of file, - topic, - author, - or metadata. ...
Operating System Security (II)
... The central elements are the File Control Blocks In UNIX, a File Control Block is called an i-node (“indexnode”) each file has a corresponding i-node structure, which contains information describing the file on-disk i-node (file system dependent) • persistent accounting information: user & group ...
... The central elements are the File Control Blocks In UNIX, a File Control Block is called an i-node (“indexnode”) each file has a corresponding i-node structure, which contains information describing the file on-disk i-node (file system dependent) • persistent accounting information: user & group ...