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The SUS mandates for du the following options: -a, In addition to the default output, include information for each non-directory entry-c, display a grand total of the disk usage found by the other arguments-d #, the depth at which summing should occur. -d 0 sums at the current level, -d 1 sums at the subdirectory, -d 2 at sub-subdirectories, etc.
Its name refers to its similar purpose to the du utility, but ncdu uses a text-based user interface under the [n]curses programming library. [3] Users can navigate the list using the arrow keys and delete files that are taking up too much space by pressing the 'd' key. Version 1.09 and later can export the file listing in JSON format.
POSIX mandates 512-byte default block sizes for the df and du utilities, reflecting the typical size of blocks on disks. When Richard Stallman and the GNU team were implementing POSIX for the GNU operating system , they objected to this on the grounds that most people think in terms of 1024 byte (or 1 KiB ) blocks.
Filelight is a graphical disk usage analyzer part of the KDE Gear.. Instead of showing a tree view of the files within a partition or directory, or even a columns-represent-directories view like xdiskusage, it shows a series of concentric pie charts representing the various directories within the requested partition or directory and the amount of space they use. [1]
Maximum filename length Allowable characters in directory entries [cc] Maximum pathname length Maximum file size Maximum volume size [cd] Max number of files AdvFS: 255 characters Any byte except NUL [ce] No limit defined [cf] 16 TiB (17.59 TB) 16 TiB (17.59 TB) ? APFS: 255 UTF-8 characters Unicode 9.0 encoded in UTF-8 [96]? 8 EiB (9.223 EB ...
In operating systems based on the Linux kernel, this information can be easily accessed by reading the /proc/loadavg file. To explore this kind of information in depth, according to the Linux's Filesystem Hierarchy Standard , architecture-dependent information are exposed on the file /proc/stat .
A 2004 test with the first-generation NCQ drive (Seagate 7200.7 NCQ) found that while NCQ increased IOMeter performance, desktop application performance decreased. [6] One review in 2010 found improvements on the order of 9% (on average) with NCQ enabled in a series of Windows multitasking tests.
In contrast to the previous O(1) scheduler used in older Linux 2.6 kernels, which maintained and switched run queues of active and expired tasks, the CFS scheduler implementation is based on per-CPU run queues, whose nodes are time-ordered schedulable entities that are kept sorted by red–black trees. The CFS does away with the old notion of ...