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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 ...
Kernel version F2FS tools version Kernel commit F2FS tools commit; Lost parent inode number (pino) bit If a file is linked, F2FS may loose its parent inode number so that fsync calls for the linked file need to perform the checkpoint every time.
ext3, or third extended filesystem, is a journaled file system that is commonly used with the Linux kernel.It used to be the default file system for many popular Linux distributions but generally has been supplanted by its successor version ext4. [3]
ext4 (fourth extended filesystem) is a journaling file system for Linux, developed as the successor to ext3.. ext4 was initially a series of backward-compatible extensions to ext3, many of them originally developed by Cluster File Systems for the Lustre file system between 2003 and 2006, meant to extend storage limits and add other performance improvements. [4]
A kernel is a component of a computer operating system. [1] A comparison of system kernels can provide insight into the design and architectural choices made by the developers of particular operating systems.
An fsync request commits modified data immediately to stable storage. fsync-heavy workloads (like a database or a virtual machine whose running OS fsyncs frequently) could potentially generate a great deal of redundant write I/O by forcing the file system to repeatedly copy-on-write and flush frequently modified parts of trees to storage.
The location of I/O schedulers in a simplified structure of the Linux kernel. The NOOP scheduler is the simplest I/O scheduler for the Linux kernel . This scheduler was developed by Jens Axboe .
Beginning with version 2.2, the flags passed to rdiff-backup are either general, or specific to the operation. For example, disabling fsync (see below) is an option that is general, and thus comes after rdiff-backup. --no-compression is specific to the backup mode, and thus comes after backup.