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F2FS uses the checkpoint scheme to maintain file system integrity. At mount time, F2FS first tries to find the last valid checkpoint data by scanning the CP area. In order to reduce the scanning time, F2FS uses only two copies of the CP. One of them always indicates the last valid data, which is called a shadow copy mechanism.
The related system call fsync() commits just the buffered data relating to a specified file descriptor. [1] fdatasync() is also available to write out just the changes made to the data in the file, and not necessarily the file's related metadata. [2] Some Unix systems run a kind of flush or update daemon, which calls the sync function on a ...
Figure 1: An ideal current source, I, driving a resistor, R, and creating a voltage V. A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it. A current source is the dual of a voltage source. The term current sink is sometimes used for sources fed from a negative ...
Failed security check. 536: Data protection level not supported by security mechanism. 537: Command protection level not supported by security mechanism. 550: Requested action not taken. File unavailable (e.g., file not found, no access). 551: Requested action aborted. Page type unknown. 552: Requested file action aborted.
Reverse path filters are typically used to disable asymmetric routing where an IP application has a different incoming and outgoing routing path. Its intent is to prevent a packet entering one interface from leaving via the other interfaces. Reverse-path Filtering is a feature of the Linux Kernel. [3]
In computer programming, unreachable code is part of the source code of a program which can never be executed because there exists no control flow path to the code from the rest of the program. [ 1 ] Unreachable code is sometimes also called dead code , [ 2 ] [ 3 ] although dead code may also refer to code that is executed but has no effect on ...
Due to licensing disputes between AT&T and the Computer Systems Research Group (CSRG) at the University of California, Berkeley, the CSRG was required to replace all Unix-derived portions of BSD source with new and unencumbered code. nvi was one of many components rewritten, despite the fact that the original vi was from UC Berkeley. AT&T had a ...
Results of the Sucks-Rules-O-Meter for Vi and Emacs from comments made on the Web; In the Church of Emacs "using a free version of vi is not a sin, it's a penance." Emacs offers Vi functionality, from the Emacs wiki; Emacs Vs Vi, from WikiWikiWeb; The Right Size for an Editor discussing vi and Emacs in relatively modern terms