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He intended it to be an advanced file system with modern features [16] like those of ZFS or Btrfs, with the speed and performance of file systems such as ext4 and XFS. [3] As of 2017 Overstreet was receiving financial support for the development of Bcachefs via Patreon. [5] As of mid-2018, the on-disk format had settled. [8]
Allocate-on-flush (also called delayed allocation) is a file system feature implemented in HFS+, [1] XFS, Reiser4, ZFS, Btrfs, and ext4. [2] The feature also closely resembles an older technique that Berkeley's UFS called "block reallocation".
File system Creator Year of introduction Original operating system; DECtape: DEC: 1964 PDP-6 Monitor OS/3x0 FS: IBM: 1964 OS/360: Level-D DEC: 1968 TOPS-10: George 3 ICT (later ICL) : 1968
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]
[2] In order to resist fragmentation, several extent-based file systems do allocate-on-flush. Many modern fault-tolerant file systems also do copy-on-write, although that increases fragmentation. As a similar design, the CP/M file system uses extents as well, but those do not correspond to the definition given above.
3 2.2857 1.5119 1.5119 S 2 2 2 Torque Converter: Hydraulic 3HP 20: TBD 1967 – Longitudinal: TBD 1.0000 3 TBD TBD S 2 2 2 Torque Converter: Hydraulic 3HP 22: TBD 1973 – 1990 Longitudinal: 2.7331 1.0000 3 2.7331 1.6532 1.6532 S 2 3 2 Torque Converter: Hydraulic 3HP 22: 30 kg⋅m (217 lb⋅ft) 1973 – 1990 Longitudinal: 2.4795 1.0000 3 2.4795 ...
ZFS (previously Zettabyte File System) is a file system with volume management capabilities. It began as part of the Sun Microsystems Solaris operating system in 2001. Large parts of Solaris, including ZFS, were published under an open source license as OpenSolaris for around 5 years from 2005 before being placed under a closed source license when Oracle Corporation acquired Sun in 2009–2010.
ZFS since Pool Version 30; Ext4, added in Linux kernel 4.1 [1] in June 2015; F2FS, added in Linux kernel 4.2 [2] [non-primary source needed] UBIFS, added in Linux ...