File system implementation
... The table has one entry for each disk block, indexed by block number The FAT is used like a linked list. The directory entry contains the block number of the first block of the file The table entry indexed by that block number then contains the block number of the next block in the file, until the l ...
... The table has one entry for each disk block, indexed by block number The FAT is used like a linked list. The directory entry contains the block number of the first block of the file The table entry indexed by that block number then contains the block number of the next block in the file, until the l ...
DNS
... • If your network is connected to the Internet, it lists the Internet name servers; otherwise it lists the root domain name servers for your local network. • The in.named daemon cycles through the list of servers until it contacts one of them. It then obtains from that server the current list of roo ...
... • If your network is connected to the Internet, it lists the Internet name servers; otherwise it lists the root domain name servers for your local network. • The in.named daemon cycles through the list of servers until it contacts one of them. It then obtains from that server the current list of roo ...
PPT - Surendar Chandra
... 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 method ...
... 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 method ...
Disk Partitioning - Seton Hall University
... predict how much space each partition will need, which may be a difficult task • Logical Volume Management, often used in servers, increases flexibility by allowing data in volumes to expand into separate physical disks • Another option is to resize existing partitions when necessary. ...
... predict how much space each partition will need, which may be a difficult task • Logical Volume Management, often used in servers, increases flexibility by allowing data in volumes to expand into separate physical disks • Another option is to resize existing partitions when necessary. ...
Chapter 9 - University of Scranton: Computing Sciences Dept.
... use FTP to transfer between their machines and the server. They would work on the files on their own machines ...
... use FTP to transfer between their machines and the server. They would work on the files on their own machines ...
L15_FS - Web Services Overview
... Files - holds information such as owner, permissions, date of modification, where the data is Directories are just a special case of files that have the pairs stored in the file
...
... Files - holds information such as owner, permissions, date of modification, where the data is Directories are just a special case of files that have the pairs
End-To-End Arguments in System Design
... Regardless of what happens in the communication systems, correct operation can only be verified by endpoints. ...
... Regardless of what happens in the communication systems, correct operation can only be verified by endpoints. ...
slides
... Follow the free list and each i-node block list When a block is encountered, examine its bit If the bit was 0, set it to 1 If the bit was already 1 • if the block is both in a file and on the free list, remove it from the free list and cross your fingers • if the block is in two files, call su ...
... Follow the free list and each i-node block list When a block is encountered, examine its bit If the bit was 0, set it to 1 If the bit was already 1 • if the block is both in a file and on the free list, remove it from the free list and cross your fingers • if the block is in two files, call su ...
Chapter 31 File Transfer & Remote File Access (NFS)
... remote computer, the FTP client that uses TCP to create a control connection to an FTP server. client and server use the FTP protocol when they communicate across the control connection. user’s keystrokes are not passed directly to the server; instead, they are interpreted by the client. If inte ...
... remote computer, the FTP client that uses TCP to create a control connection to an FTP server. client and server use the FTP protocol when they communicate across the control connection. user’s keystrokes are not passed directly to the server; instead, they are interpreted by the client. If inte ...
24 File Locking 25 Filesystem Reliability
... replace media and restore data from backup media. Amount of data loss is limited to modifications that occured since the last backup. Mirrored disks: multiple copies of the filesystem are maintained on independent disks. Disk writes update all the redundant disks in parallel. Used in applications th ...
... replace media and restore data from backup media. Amount of data loss is limited to modifications that occured since the last backup. Mirrored disks: multiple copies of the filesystem are maintained on independent disks. Disk writes update all the redundant disks in parallel. Used in applications th ...
Presentation on File Managers
... a file system so as to waste as little storage as possible, speed up access to the files and to move often used files to the front of the ...
... a file system so as to waste as little storage as possible, speed up access to the files and to move often used files to the front of the ...
cfintro
... After a lot of use (files created, edited, and deleted) the FAT becomes very fragmented. Not easy to search through the FAT on a hard disk as it is very large. Need software to interpret the FAT for us. File slack may contain valuable data. ...
... After a lot of use (files created, edited, and deleted) the FAT becomes very fragmented. Not easy to search through the FAT on a hard disk as it is very large. Need software to interpret the FAT for us. File slack may contain valuable data. ...
File System Facts 5.3.3
... cannot create them. Operating systems up to and including Windows 98/ME support only the FAT32 file system. For newer Windows systems (Windows 2000/XP and later), you will likely choose NTFS over FAT for hard drives to take advantage of additional features not supported by FAT such as: ...
... cannot create them. Operating systems up to and including Windows 98/ME support only the FAT32 file system. For newer Windows systems (Windows 2000/XP and later), you will likely choose NTFS over FAT for hard drives to take advantage of additional features not supported by FAT such as: ...
File System Caching Journaling File Systems
... File System Function: main secondary data storage; also permanent Two possibilities: Extreme speed bottleneck! Capacity not a problem nowadays: 2 TB disks even for PC. But backup becoming a problem. Logical view (view of programmer): Have a tree structure of files together with read/write operation ...
... File System Function: main secondary data storage; also permanent Two possibilities: Extreme speed bottleneck! Capacity not a problem nowadays: 2 TB disks even for PC. But backup becoming a problem. Logical view (view of programmer): Have a tree structure of files together with read/write operation ...
Computer Networks and Internets
... Enters commands to list directories, transfer files Server Established ...
... Enters commands to list directories, transfer files Server Established ...
Ch-11_3431
... pointers to the next empty block Very space efficient -- Only need to store one pointer to the first empty block Very simple, but time consuming to allocate large numbers of blocks Can "group" the pointers into a single block for efficiency, and have the last pointer on the block point to the ...
... pointers to the next empty block Very space efficient -- Only need to store one pointer to the first empty block Very simple, but time consuming to allocate large numbers of blocks Can "group" the pointers into a single block for efficiency, and have the last pointer on the block point to the ...
File concept
... into executable statements Object file – sequence of bytes organized into blocks understandable by system linker\ Executable file – series of code sections that the loader can bring into memory & execute ...
... into executable statements Object file – sequence of bytes organized into blocks understandable by system linker\ Executable file – series of code sections that the loader can bring into memory & execute ...
EXCEPTIONS
... Exceptions occur when exceptional situations occur in your program. For example, what if you are going to read a file and the file does not exist? Or what if you accidentally deleted it when the program was running? Such situations are handled using exceptions. Similarly, what if your program had so ...
... Exceptions occur when exceptional situations occur in your program. For example, what if you are going to read a file and the file does not exist? Or what if you accidentally deleted it when the program was running? Such situations are handled using exceptions. Similarly, what if your program had so ...
File Share Dependencies
... resource depend on at least a network name resource and a physical disk resource. The network name dependency enables the client to access the file share over the network by using the virtual server name instead of the node name. Using the virtual server name ensures that the client opens the conn ...
... resource depend on at least a network name resource and a physical disk resource. The network name dependency enables the client to access the file share over the network by using the virtual server name instead of the node name. Using the virtual server name ensures that the client opens the conn ...
CS140 – Operating Systems Midterm Review
... {secret, {Crypto}}, can A include observation? • No – level(S) must dominate level(O) – If level(O1) = {secret, {Nuclear}} and level(O2) = {top-secret, {Nuclear}}, is it possible for S to observe O1 and modify O2? • Yes – level(O2) must dominate level(O1) ...
... {secret, {Crypto}}, can A include observation? • No – level(S) must dominate level(O) – If level(O1) = {secret, {Nuclear}} and level(O2) = {top-secret, {Nuclear}}, is it possible for S to observe O1 and modify O2? • Yes – level(O2) must dominate level(O1) ...
Partition In personal computers, a partition is a logical division of a
... diskette drives). A two-partition hard drive would typically contain "C:" and "D:" drives. (CD-ROM drives typically are assigned the last letter in whatever sequence of letters have been used as a result of hard disk formatting, or typically with a two-partition, the "E:" drive.) When you boot an op ...
... diskette drives). A two-partition hard drive would typically contain "C:" and "D:" drives. (CD-ROM drives typically are assigned the last letter in whatever sequence of letters have been used as a result of hard disk formatting, or typically with a two-partition, the "E:" drive.) When you boot an op ...