Slide 1
... Peer-to-Peer Applications There is no notion of clients or servers but only equal peer nodes that simultaneously function as both “clients” and “servers” File sharing (containing audio, video, data) is the most common application of P2P networks Some applications like Torrent may start as Clientserv ...
... Peer-to-Peer Applications There is no notion of clients or servers but only equal peer nodes that simultaneously function as both “clients” and “servers” File sharing (containing audio, video, data) is the most common application of P2P networks Some applications like Torrent may start as Clientserv ...
Gfarm Grid File System Osamu Tatebe University of Tsukuba
... Adaptive replica creation and consistent management Create multiple file replicas to increase performance and reliability Create file replicas at distant locations for disaster recovery Open Source Software Linux binary packages, ports for *BSD, . . . It is included in Naregi, Knoppix HTC edition, a ...
... Adaptive replica creation and consistent management Create multiple file replicas to increase performance and reliability Create file replicas at distant locations for disaster recovery Open Source Software Linux binary packages, ports for *BSD, . . . It is included in Naregi, Knoppix HTC edition, a ...
File Systems - The University of Alabama in Huntsville
... two I/O operations start at about the same time, serial access is enforced to make sure data is consistent. That is, one operation is performed in its entirety before the next one begins. • However, a read from user 1, followed by a write from user 2, followed by a read from user 1 means that user 1 ...
... two I/O operations start at about the same time, serial access is enforced to make sure data is consistent. That is, one operation is performed in its entirety before the next one begins. • However, a read from user 1, followed by a write from user 2, followed by a read from user 1 means that user 1 ...
The broken file shredder
... Non-magnetic disks (flash, NVRAM) try to avoid overwriting the same bits repeatedly and instead create multiple copies of data. Not shredded: temporary copies from text editors, printer spoolers, mail clients; swap files. But wait, there is more... ...
... Non-magnetic disks (flash, NVRAM) try to avoid overwriting the same bits repeatedly and instead create multiple copies of data. Not shredded: temporary copies from text editors, printer spoolers, mail clients; swap files. But wait, there is more... ...
Chapter 10-11 File Systems
... o search System-Wide Open-File Table to see if file is currently in use if it is, create a Per-Process Open-File table entry pointing to the existing System-Wide Open-File Table if it is not, search the directory for the file name; once found, place the FCB in the System-Wide Open-File Table o m ...
... o search System-Wide Open-File Table to see if file is currently in use if it is, create a Per-Process Open-File table entry pointing to the existing System-Wide Open-File Table if it is not, search the directory for the file name; once found, place the FCB in the System-Wide Open-File Table o m ...
File-System Implementation
... hash table takes a value computed from file name and returns a pointer to the file name in a linear list ...
... hash table takes a value computed from file name and returns a pointer to the file name in a linear list ...
A File System for Storage Class Memory
... files within the file system. These NULL files have no name, no data, however have already been allocated some physical space. When we need to create a new file, we always try to find a NULL file first. When a file shrinks, we will not de-allocate the unused space. And when we need to delete an exis ...
... files within the file system. These NULL files have no name, no data, however have already been allocated some physical space. When we need to create a new file, we always try to find a NULL file first. When a file shrinks, we will not de-allocate the unused space. And when we need to delete an exis ...
File Systems
... – If a disk block was written every time a process executed a write statement the number of writes would increase greatly. ...
... – If a disk block was written every time a process executed a write statement the number of writes would increase greatly. ...
Comparison and Performance Evaluation of SAN File System
... Metadata can exist at disk, disk cache, and client memory. Clients serve only local file system requests and act as file mangers for their requests. ...
... Metadata can exist at disk, disk cache, and client memory. Clients serve only local file system requests and act as file mangers for their requests. ...
Data Structures in C
... • Text files may only contain ASCII data. • Binary files contain images of the data. • Files are opened as text by adding a “t” to the open mode. • Files are opened as binary by adding a “b” to the open mode. ...
... • Text files may only contain ASCII data. • Binary files contain images of the data. • Files are opened as text by adding a “t” to the open mode. • Files are opened as binary by adding a “b” to the open mode. ...
An Improved Approach to Generating Configuration Files from a
... Standard development environment Host interface written once Code sharing with web routines All work done centrally PL/SQL well integrated to Database ...
... Standard development environment Host interface written once Code sharing with web routines All work done centrally PL/SQL well integrated to Database ...
File system implementation
... To keep track o free disk space, the system maintains a free-space list Frequently, the free-space list is implemented as a bit vector Each block is represented by 1 bit, if block is free, the bit is 1, else 0 ...
... To keep track o free disk space, the system maintains a free-space list Frequently, the free-space list is implemented as a bit vector Each block is represented by 1 bit, if block is free, the bit is 1, else 0 ...
DBMS File Structure
... format. A disk drive is formatted into several blocks, which are capable for storing records. File records are mapped ...
... format. A disk drive is formatted into several blocks, which are capable for storing records. File records are mapped ...
L15_FS - Web Services Overview
... mounting - allows other file systems (disks), whether local or remote to be “mounted into a uniform file system space ...
... mounting - allows other file systems (disks), whether local or remote to be “mounted into a uniform file system space ...
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. ...
Files and Directories
... – Inefficient for tiny files (a 1 byte file requires both an inode and a data block) – Inefficient encoding when file is mostly contiguous on disk (no equivalent to superpages) – Need to reserve 10-20% of free space to prevent ...
... – Inefficient for tiny files (a 1 byte file requires both an inode and a data block) – Inefficient encoding when file is mostly contiguous on disk (no equivalent to superpages) – Need to reserve 10-20% of free space to prevent ...
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 ...
OSPP: File Systems
... – Inefficient for tiny files (a 1 byte file requires both an inode and a data block) – Inefficient encoding when file is mostly contiguous on disk (no equivalent to superpages) – Need to reserve 10-20% of free space to prevent ...
... – Inefficient for tiny files (a 1 byte file requires both an inode and a data block) – Inefficient encoding when file is mostly contiguous on disk (no equivalent to superpages) – Need to reserve 10-20% of free space to prevent ...
cfintro
... Capturing a Drive Image Drive may be imaged via a USB or FireWire connection, or over the network. The size of the drive being imaged affects the time required to perform the capture. The speed of the connection also affects the time required to image the drive. A 500 GB drive may require 8 ...
... Capturing a Drive Image Drive may be imaged via a USB or FireWire connection, or over the network. The size of the drive being imaged affects the time required to perform the capture. The speed of the connection also affects the time required to image the drive. A 500 GB drive may require 8 ...
FILE SYSTEMS INTERFACE
... A collection of related bytes having meaning only to the creator. The file can be "free formed", indexed, structured, etc. ...
... A collection of related bytes having meaning only to the creator. The file can be "free formed", indexed, structured, etc. ...
slides
... Allows us to batch-up multiple writes to the same block Allows for better overlap of CPU and I/O CPU does not stall waiting for the disk ...
... Allows us to batch-up multiple writes to the same block Allows for better overlap of CPU and I/O CPU does not stall waiting for the disk ...
File concept
... Write – name of the file & information to be written on the file Read – name of the file & read pointer Reposition within file – file seek (repositioning within a directory) Delete – name of the file Truncate – erasing the contents but keeping the attributes File table: Open(Fi) – search the directo ...
... Write – name of the file & information to be written on the file Read – name of the file & read pointer Reposition within file – file seek (repositioning within a directory) Delete – name of the file Truncate – erasing the contents but keeping the attributes File table: Open(Fi) – search the directo ...
Mid-term Presentation
... Cloud Storage Systems A Survey Presented By Nitya Shankaran Ritika Sharma ...
... Cloud Storage Systems A Survey Presented By Nitya Shankaran Ritika Sharma ...