The following lists identify, characterize, and link to more thorough information on

Computer file A computer file is a computer resource for recording data in a computer storage device, primarily identified by its file name. Just as words can be written to paper, so can data be written to a computer file. Files can be shared with and transfe ...

systems. Many older

operating system An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Time-sharing operating systems schedule tasks for efficient use of the system and may also in ...

s support only their one "native" file system, which does not bear any name apart from the name of the operating system itself.

Disk file systems

Disk file systems are usually block-oriented. Files in a block-oriented file system are sequences of blocks, often featuring fully random-access read, write, and modify operations. * ADFS –

Acorn The acorn, or oaknut, is the nut of the oaks and their close relatives (genera ''Quercus'' and '' Lithocarpus'', in the family Fagaceae). It usually contains one seed (occasionally two seeds), enclosed in a tough, leathery shell, and borne ...

's Advanced Disc filing system, successor to DFS. *

AdvFS AdvFS, also known as Tru64 UNIX Advanced File System, is a file system developed in the late 1980s to mid-1990s by Digital Equipment Corporation for their OSF/1 version of the Unix operating system (later Digital UNIX/Tru64 UNIX). In June 2008 ...

– Advanced File System, designed by

Digital Equipment Corporation Digital Equipment Corporation (DEC ), using the trademark Digital, was a major American company in the computer industry from the 1960s to the 1990s. The company was co-founded by Ken Olsen and Harlan Anderson in 1957. Olsen was president unt ...

for their Digital UNIX (now Tru64 UNIX) operating system. *

APFS Apple File System (APFS) is a proprietary file system developed and deployed by Apple Inc. for macOS Sierra (10.12.4) and later, iOS 10.3 and later, tvOS 10.2 and later, watchOS 3.2 and later, and all versions of iPadOS. It aims to fix c ...

– Apple File System is a next-generation file system for Apple products. * AthFS –

AtheOS Syllable Desktop is a discontinued free and open-source operating system for Pentium and compatible processors. Its purpose is to create an easy-to-use desktop operating system for the home and small office user. It was forked from the stagnant ...

File System, a

64-bit In computer architecture, 64-bit Integer (computer science), integers, memory addresses, or other Data (computing), data units are those that are 64 bits wide. Also, 64-bit central processing unit, CPUs and arithmetic logic unit, ALUs are those ...

journaled filesystem now used by

Syllable A syllable is a unit of organization for a sequence of speech sounds typically made up of a syllable nucleus (most often a vowel) with optional initial and final margins (typically, consonants). Syllables are often considered the phonological "bu ...

. Also called AFS. * BFS – the Boot File System used on System V release 4.0 and UnixWare. * BFS – the Be File System used on

BeOS BeOS is an operating system for personal computers first developed by Be Inc. in 1990. It was first written to run on BeBox hardware. BeOS was positioned as a multimedia platform that could be used by a substantial population of desktop users a ...

, occasionally misnamed as BeFS. Open source implementation called OpenBFS is used by the

Haiku is a type of short form poetry originally from Japan. Traditional Japanese haiku consist of three phrases that contain a ''kireji'', or "cutting word", 17 '' on'' (phonetic units similar to syllables) in a 5, 7, 5 pattern, and a ''kigo'', or se ...

operating system. * Byte File System (BFS) - file system used by

z/VM z/VM is the current version in IBM's VM family of virtual machine operating systems. z/VM was first released in October 2000 and remains in active use and development . It is directly based on technology and concepts dating back to the 1960s, wi ...

for Unix applications *

Btrfs Btrfs (pronounced as "better F S", "butter F S", "b-tree F S", or simply by spelling it out) is a computer storage format that combines a file system based on the copy-on-write (COW) principle with a logical volume manager (not to be confused ...

– is a

copy-on-write Copy-on-write (COW), sometimes referred to as implicit sharing or shadowing, is a resource-management technique used in computer programming to efficiently implement a "duplicate" or "copy" operation on modifiable resources. If a resource is dupl ...

file system for

Linux Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, which ...

announced by

Oracle An oracle is a person or agency considered to provide wise and insightful counsel or prophetic predictions, most notably including precognition of the future, inspired by deities. As such, it is a form of divination. Description The word '' ...

in 2007 and published under the

GNU General Public License The GNU General Public License (GNU GPL or simply GPL) is a series of widely used free software licenses that guarantee end users the Four Freedoms (Free software), four freedoms to run, study, share, and modify the software. The license was th ...

(GPL). * CFS – The Cluster File System from Veritas, a Symantec company. It is the parallel access version of VxFS. *

CP/M CP/M, originally standing for Control Program/Monitor and later Control Program for Microcomputers, is a mass-market operating system created in 1974 for Intel 8080/ 85-based microcomputers by Gary Kildall of Digital Research, Inc. Initial ...

file system — Native filesystem used in the CP/M (Control Program for Microcomputers) operating system which was first released in 1974. * DOS 3.x – Original floppy operating system and file system developed for the

Apple II The Apple II (stylized as ) is an 8-bit home computer and one of the world's first highly successful mass-produced microcomputer products. It was designed primarily by Steve Wozniak; Jerry Manock developed the design of Apple II's foam-m ...

. *

Extent File System Extent File System (EFS) is an older extent-based file system used in IRIX releases prior to version 5.3. It has been superseded by XFS. External links EFS support for LinuxEFS support for NetBSD {{File systems Disk file systems IRIX ...

(EFS) – an older block filing system under

IRIX IRIX ( ) is a discontinued operating system developed by Silicon Graphics (SGI) to run on the company's proprietary MIPS workstations and servers. It is based on UNIX System V with BSD extensions. In IRIX, SGI originated the XFS file system and ...

. *

ext Ext, ext or EXT may refer to: * Ext functor, used in the mathematical field of homological algebra * Ext (JavaScript library), a programming library used to build interactive web applications * Exeter Airport (IATA airport code), in Devon, England ...

– Extended file system, designed for

systems. *

ext2 The ext2 or second extended file system is a file system for the Linux kernel. It was initially designed by French software developer Rémy Card as a replacement for the extended file system (ext). Having been designed according to the same pr ...

– Second extended file system, designed for

systems. *

ext3 ext3, or third extended filesystem, is a journaled file system that is commonly used by the Linux kernel. It used to be the default file system for many popular Linux distributions. Stephen Tweedie first revealed that he was working on ext ...

– A journaled form of ext2. *

ext4 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 ...

– A follow up for

and also a journaled filesystem with support for

extents In computing, an extent is a contiguous area of storage reserved for a file in a file system, represented as a range of block numbers, or tracks on count key data devices. A file can consist of zero or more extents; one file fragment requires on ...

. *

ext3cow Ext3cow or third extended filesystem with copy-on-write is an open source, versioning file system based on the ext3 file system. Versioning is implemented through block-level copy-on-write. It shares many of its performance characteristics wi ...

– A

versioning file system A versioning file system is any computer file system which allows a computer file to exist in several versions at the same time. Thus it is a form of revision control. Most common versioning file systems keep a number of old copies of the file. S ...

form of ext3. *

FAT In nutrition science, nutrition, biology, and chemistry, fat usually means any ester of fatty acids, or a mixture of such chemical compound, compounds, most commonly those that occur in living beings or in food. The term often refers spec ...

– File Allocation Table, initially used on

DOS DOS is shorthand for the MS-DOS and IBM PC DOS family of operating systems. DOS may also refer to: Computing * Data over signalling (DoS), multiplexing data onto a signalling channel * Denial-of-service attack (DoS), an attack on a communicat ...

and

Microsoft Windows Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for serv ...

and now widely used for portable USB storage and some other devices;

FAT12 File Allocation Table (FAT) is a file system developed for personal computers. Originally developed in 1977 for use on floppy disks, it was adapted for use on hard disks and other devices. It is often supported for compatibility reasons by ...

FAT16 File Allocation Table (FAT) is a file system developed for personal computers. Originally developed in 1977 for use on floppy disks, it was adapted for use on Hard disk drive, hard disks and other devices. It is often supported for compatibi ...

and

FAT32 File Allocation Table (FAT) is a file system developed for personal computers. Originally developed in 1977 for use on floppy disks, it was adapted for use on hard disks and other devices. It is often supported for compatibility reasons by c ...

for 12-, 16- and

32-bit In computer architecture, 32-bit computing refers to computer systems with a processor, memory, and other major system components that operate on data in 32-bit units. Compared to smaller bit widths, 32-bit computers can perform large calculation ...

table depths. **

VFAT File Allocation Table (FAT) is a file system developed for personal computers. Originally developed in 1977 for use on floppy disks, it was adapted for use on hard disks and other devices. It is often supported for compatibility reasons by ...

– Optional layer on

FAT system to allow long (up to 255 character) filenames instead of only the

8.3 filename An 8.3 filename (also called a short filename or SFN) is a filename convention used by old versions of DOS and versions of Microsoft Windows prior to Windows 95 and Windows NT 3.5. It is also used in modern Microsoft operating systems as an alterna ...

s allowed in the plain FAT filesystem. **

FATX File Allocation Table (FAT) is a file system developed for personal computers. Originally developed in 1977 for use on floppy disks, it was adapted for use on hard disks and other devices. It is often supported for compatibility reasons by ...

– A modified version of

FAT system that is used on the original

Xbox Xbox is a video gaming brand created and owned by Microsoft. The brand consists of five video game consoles, as well as applications (games), streaming services, an online service by the name of Xbox network, and the development arm by the na ...

console. * FFS (Amiga) – Fast File System, used on

Amiga Amiga is a family of personal computers introduced by Commodore in 1985. The original model is one of a number of mid-1980s computers with 16- or 32-bit processors, 256 KB or more of RAM, mouse-based GUIs, and significantly improved graphi ...

systems. This FS has evolved over time. Now counts FFS1, FFS Intl, FFS DCache, FFS2. * FFS – Fast File System, used on *

BSD The Berkeley Software Distribution or Berkeley Standard Distribution (BSD) is a discontinued operating system based on Research Unix, developed and distributed by the Computer Systems Research Group (CSRG) at the University of California, Berk ...

systems *

Fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

–

Plan 9 from Bell Labs Plan 9 from Bell Labs is a distributed operating system which originated from the Computing Science Research Center (CSRC) at Bell Labs in the mid-1980s and built on UNIX concepts first developed there in the late 1960s. Since 2000, Plan 9 has be ...

snapshot archival file system. *

Files-11 Files-11 is the file system used by Digital Equipment Corporation OpenVMS operating system, and also (in a simpler form) by the older RSX-11. It is a hierarchical file system, with support for access control lists, record-oriented I/O, remote ...

–

OpenVMS OpenVMS, often referred to as just VMS, is a multi-user, multiprocessing and virtual memory-based operating system. It is designed to support time-sharing, batch processing, transaction processing and workstation applications. Customers using Ope ...

file system; also used on some

PDP-11 The PDP-11 is a series of 16-bit minicomputers sold by Digital Equipment Corporation (DEC) from 1970 into the 1990s, one of a set of products in the Programmed Data Processor (PDP) series. In total, around 600,000 PDP-11s of all models were sold, ...

systems; supports record-oriented files *

Flex machine The Flex Computer System was developed by Michael Foster and Ian Currie of Royal Signals and Radar Establishment (RSRE) in Malvern, England, during the late 1970s and 1980s. It used a tagged storage scheme to implement a capability architectu ...

file system *

HAMMER A hammer is a tool, most often a hand tool, consisting of a weighted "head" fixed to a long handle that is swung to deliver an impact to a small area of an object. This can be, for example, to drive nails into wood, to shape metal (as w ...

— clustered

DragonFly BSD DragonFly BSD is a free and open-source Unix-like operating system forked from FreeBSD 4.8. Matthew Dillon, an Amiga developer in the late 1980s and early 1990s and FreeBSD developer between 1994 and 2003, began working on DragonFly BSD in Ju ...

filesystem, production-ready since DragonFly 2.2 (2009) *

HAMMER2 HAMMER2 is a successor to the HAMMER filesystem, redesigned from the ground up to support enhanced clustering. HAMMER2 supports online and batched deduplication, snapshots, directory entry indexing, multiple mountable filesystem roots, mounta ...

— recommended as the default root filesystem in DragonFly since 5.2 release in 2018 * HFS – Hierarchical File System in IBM's

z/OS z/OS is a 64-bit operating system for IBM z/Architecture mainframes, introduced by IBM in October 2000. It derives from and is the successor to OS/390, which in turn was preceded by a string of MVS versions.Starting with the earliest: * O ...

; not to be confused with Apple's HFS. HFS is still supported but IBM's stated direction is

zFS 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 ope ...

. * HFS – Hierarchical File System, in use until HFS+ was introduced on Mac OS 8.1. Also known as Mac OS Standard format. Successor to Macintosh File System (MFS) & predecessor to HFS+; not to be confused with IBM's HFS provided with

HFS+ HFS Plus or HFS+ (also known as Mac OS Extended or HFS Extended) is a journaling file system developed by Apple Inc. It replaced the Hierarchical File System (HFS) as the primary file system of Apple computers with the 1998 release of Mac OS 8.1 ...

– Updated version of Apple's HFS, Hierarchical File System, supported on Mac OS 8.1 & above, including macOS. Supports file system journaling, enabling recovery of data after a system crash. Also referred to as 'Mac OS Extended format or HFS Plus * HPFS – High Performance File System, used on

OS/2 OS/2 (Operating System/2) is a series of computer operating systems, initially created by Microsoft and IBM under the leadership of IBM software designer Ed Iacobucci. As a result of a feud between the two companies over how to position OS/2 ...

HTFS High Throughput File System (HTFS) is the journaling file system used by current versions of SCO OpenServer Xinuos OpenServer, previously SCO UNIX and SCO Open Desktop (SCO ODT), is a closed source computer operating system developed by San ...

– High Throughput Filesystem, used on

SCO OpenServer Xinuos OpenServer, previously SCO UNIX and SCO Open Desktop (SCO ODT), is a closed source computer operating system developed by Santa Cruz Operation (SCO), later acquired by SCO Group, and now owned by Xinuos. Early versions of OpenServer we ...

ISO 9660 ISO 9660 (also known as ECMA-119) is a file system for optical disc media. Being sold by the International Organization for Standardization (ISO) the file system is considered an international technical standard. Since the specification is av ...

– Used on

CD-ROM A CD-ROM (, compact disc read-only memory) is a type of read-only memory consisting of a pre-pressed optical compact disc that contains data. Computers can read—but not write or erase—CD-ROMs. Some CDs, called enhanced CDs, hold both comput ...

and

DVD-ROM The DVD (common abbreviation for Digital Video Disc or Digital Versatile Disc) is a digital optical disc data storage format. It was invented and developed in 1995 and first released on November 1, 1996, in Japan. The medium can store any ki ...

discs (

Rock Ridge ISO 9660 (also known as ECMA-119) is a file system for optical disc media. Being sold by the International Organization for Standardization (ISO) the file system is considered an international technical standard. Since the specification is av ...

and Joliet are extensions to this) * JFS – IBM

Journaling file system A journaling file system is a file system that keeps track of changes not yet committed to the file system's main part by recording the goal of such changes in a data structure known as a "journal", which is usually a circular log. In the even ...

, provided in

, and

AIX Aix or AIX may refer to: Computing * AIX, a line of IBM computer operating systems *An Alternate Index, for a Virtual Storage Access Method Key Sequenced Data Set * Athens Internet Exchange, a European Internet exchange point Places Belgi ...

. Supports

. * LFS – 4.4BSD implementation of a

log-structured file system A log-structured filesystem is a file system in which data and metadata are written sequentially to a circular buffer, called a log. The design was first proposed in 1988 by John K. Ousterhout and Fred Douglis and first implemented in 1992 by ...

* MFS – Macintosh File System, used on early

Classic Mac OS Mac OS (originally System Software; retronym: Classic Mac OS) is the series of operating systems developed for the Macintosh family of personal computers by Apple Computer from 1984 to 2001, starting with System 1 and ending with Mac OS 9. The ...

systems. Succeeded by Hierarchical File System (HFS). *

Next3 Next3 is a journaling file system for Linux based on ext3 which adds snapshots support, yet retains compatibility to the ext3 on-disk format. Next3 is implemented as open-source software, licensed under the GPL license. Background A snapshot is ...

– A form of

with snapshots support. * MFS – TiVo's Media File System, a proprietary fault tolerant format used on

TiVo TiVo ( ) is a digital video recorder (DVR) developed and marketed by Xperi (previously by TiVo Corporation and TiVo Inc.) and introduced in 1999. TiVo provides an on-screen guide of scheduled broadcast programming television programs, whose fea ...

hard drives for real time recording from live TV. *

Minix file system The Minix file system is the native file system of the Minix operating system. It was written from scratch by Andrew S. Tanenbaum in the 1980s and aimed to replicate the structure of the Unix File System while omitting complex features, and was ...

– Used on Minix systems *

NILFS NILFS or NILFS2 (''New Implementation of a Log-structured File System'') is a log-structured file system implementation for the Linux kernel. It was developed by Nippon Telegraph and Telephone Corporation (NTT) CyberSpace Laboratories and a comm ...

– Linux implementation of a

NTFS New Technology File System (NTFS) is a proprietary journaling file system developed by Microsoft. Starting with Windows NT 3.1, it is the default file system of the Windows NT family. It superseded File Allocation Table (FAT) as the preferred fil ...

– (New Technology File System) Used on

Microsoft Microsoft Corporation is an American multinational technology corporation producing computer software, consumer electronics, personal computers, and related services headquartered at the Microsoft Redmond campus located in Redmond, Washing ...

Windows NT Windows NT is a proprietary graphical operating system An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Time-sharing operating systems sc ...

-based operating systems *

NeXT Next may refer to: Arts and entertainment Film * ''Next'' (1990 film), an animated short about William Shakespeare * ''Next'' (2007 film), a sci-fi film starring Nicolas Cage * '' Next: A Primer on Urban Painting'', a 2005 documentary film Lit ...

NeXTstation NeXTstation is a high-end workstation computer developed, manufactured and sold by NeXT from 1990 until 1993. It runs the NeXTSTEP operating system. Overview The NeXTstation was released as a more affordable alternative to the NeXTcube at about ...

and

NeXTcube The NeXTcube is a high-end workstation computer developed, manufactured, and sold by NeXT from 1990 until 1993. It superseded the original NeXT Computer workstation and is housed in a similar cube-shaped magnesium enclosure, designed by frog desig ...

file system * NetWare File System – The original

NetWare NetWare is a discontinued computer network operating system developed by Novell, Inc. It initially used cooperative multitasking to run various services on a personal computer, using the IPX network protocol. The original NetWare product in 19 ...

2.x–5.x file system, used optionally by later versions. * NSS – Novell Storage Services. This is a new 64-bit

journaling file system A journaling file system is a file system that keeps track of changes not yet committed to the file system's main part by recording the goal of such changes in a data structure known as a "journal", which is usually a circular log. In the even ...

using a balanced tree algorithm. Used in

versions 5.0-up and recently ported to

. *

OneFS The OneFS File System is a parallel distributed networked file system designed by Isilon Systems and is the basis for the ''Isilon Scale-out Storage Platform''. The OneFS file system is controlled and managed by the OneFS Operating System, a Fre ...

– One File System. This is a fully journaled, distributed file system used by

Isilon Dell EMC Isilon is a scale out network-attached storage platform offered by Dell EMC for high-volume storage, backup and archiving of unstructured data. It provides a cluster-based storage array based on industry standard hardware, and is scala ...

. OneFS uses FlexProtect and Reed–Solomon encodings to support up to four simultaneous disk failures. * OFS – Old File System, on Amiga. Good for floppies, but fairly useless on hard drives. *

OS-9 OS-9 is a family of real-time, process-based, multitasking, multi-user operating systems, developed in the 1980s, originally by Microware Systems Corporation for the Motorola 6809 microprocessor. It was purchased by Radisys Corp in 2001, and ...

file system * PFS – and PFS2, PFS3, etc. Technically interesting file system available for the

, performs very well under a lot of circumstances. Very simple and elegant. *

ProDOS ProDOS is the name of two similar operating systems for the Apple II series of personal computers. The original ProDOS, renamed ProDOS 8 in version 1.2, is the last official operating system usable by all 8-bit Apple II series computers, and w ...

– Operating system and file system successor to DOS 3.x, for use on Apple's computers prior to the Macintosh & Lisa computers, the Apple series, including the

IIgs The Apple IIGS (styled as II), the fifth and most powerful of the Apple II family, is a 16-bit personal computer produced by Apple Computer. While featuring the Macintosh look and feel, and resolution and color similar to the Amiga and Atari ST ...

Qnx4fs QNX4FS is an extent-based file system used by the QNX4 and QNX6 operating systems. As the file system uses soft updates, it remains consistent even after a power failure, without using journaling. Instead, the writes are carefully ordered and ...

– File system that is used in

QNX QNX ( or ) is a commercial Unix-like real-time operating system, aimed primarily at the embedded systems market. QNX was one of the first commercially successful microkernel operating systems. The product was originally developed in the early ...

version 4 and 6. * ReFS (Resilient File System) – New file system by

that is built on the foundations of

(but cannot boot, has a default cluster size of 64 KB and does not support compression) and is intended to be used with the

Windows Server 2012 Windows Server 2012, codenamed "Windows Server 8", is the sixth version of the Windows Server operating system by Microsoft, as part of the Windows NT family of operating systems. It is the server version of Windows based on Windows 8 and succe ...

operating system. *

ReiserFS ReiserFS is a general-purpose, journaling file system initially designed and implemented by a team at Namesys led by Hans Reiser and licensed under GPLv2. Introduced in version 2.4.1 of the Linux kernel, it was the first journaling file sys ...

– File system that uses journaling *

Reiser4 Reiser4 is a computer file system, successor to the ReiserFS file system, developed from scratch by Namesys and sponsored by DARPA as well as Linspire. Reiser4 was named after its former lead developer Hans Reiser. , the Reiser4 patch set is ...

– File system that uses journaling, newest version of ReiserFS * Reliance – Datalight's transactional file system for high reliability applications * Reliance Nitro – Tree-based transactional file system developed for high-performance embedded systems, from Datalight * RFS – Native filesystem for

RTEMS Real-Time Executive for Multiprocessor Systems (RTEMS), formerly Real-Time Executive for Missile Systems, and then Real-Time Executive for Military Systems, is a real-time operating system (RTOS) designed for embedded systems. It is free and open ...

SkyFS SkyOS (''Sky Operating System'') is a discontinued prototype commercial, Proprietary software, proprietary, graphical desktop operating system written for the x86 computer architecture. As of January 30, 2009 development was halted with no plans ...

– Developed for

SkyOS SkyOS (''Sky Operating System'') is a discontinued prototype commercial, proprietary, graphical desktop operating system written for the x86 computer architecture. As of January 30, 2009 development was halted with no plans to resume its develop ...

to replace BFS as the operating system's main file system. It is based on BFS, but contains many new features. * SFS – Smart File System,

available for the Amiga platforms. * Soup (Apple) – the "file system" for Apple Newton Platform, structured as a shallow database *

Tux3 Tux3 is an open-source versioning filesystem created by Daniel Phillips. He introduced the filesystem as a public replacement for his Tux2 filesystem which had encountered licensing issues due to the filing of several patents. Phillips had previo ...

– An experimental versioning file system intended as a replacement for ext3 * UDF – Packet-based file system for WORM/RW media such as CD-RW and DVD, now supports hard drives and flash memory as well. * UFS – Unix File System, used on

Solaris Solaris may refer to: Arts and entertainment Literature, television and film * ''Solaris'' (novel), a 1961 science fiction novel by Stanisław Lem ** ''Solaris'' (1968 film), directed by Boris Nirenburg ** ''Solaris'' (1972 film), directed by ...

and older

systems * UFS2 – Unix File System, used on newer

systems *

VxFS The VERITAS File System (or VxFS; called JFS and OnlineJFS in HP-UX) is an extent-based file system. It was originally developed by VERITAS Software. Through an OEM agreement, VxFS is used as the primary filesystem of the HP-UX operating s ...

Veritas Veritas is the name given to the Roman virtue of Honesty, truthfulness, which was considered one of the main virtues any good Roman should possess. The Greek goddess of truth is Aletheia (Ancient Greek language, Ancient Greek: ). The German phi ...

file system, first commercial

;

HP-UX HP-UX (from "Hewlett Packard Unix") is Hewlett Packard Enterprise's proprietary implementation of the Unix operating system, based on Unix System V (initially System III) and first released in 1984. Current versions support HPE Integrity Ser ...

, UnixWare *

VTOC In the IBM System/360Including the successors S/370 through z/Architecture storage architecture, the Volume Table of Contents (VTOC), is a data structure that provides a way of locating the data sets that reside on a particular DASD volume. With t ...

(Volume Table Of Contents) - Data structure on IBM mainframe

direct-access storage device A direct-access storage device (DASD) (pronounced ) is a secondary storage device in which "each physical record has a discrete location and a unique address". The term was coined by IBM to describe devices that allowed random access to data, t ...

s (DASD) such as disk drives that provides a way of locating the data sets that reside on the

DASD A direct-access storage device (DASD) (pronounced ) is a secondary storage device in which "each physical record has a discrete location and a unique address". The term was coined by IBM to describe devices that allowed random access to data, ...

volume. *

XFS XFS is a high-performance 64-bit journaling file system created by Silicon Graphics, Inc (SGI) in 1993. It was the default file system in SGI's IRIX operating system starting with its version 5.3. XFS was ported to the Linux kernel in 2001; as ...

– Used on

SGI SGI may refer to: Companies *Saskatchewan Government Insurance *Scientific Games International, a gambling company *Silicon Graphics, Inc., a former manufacturer of high-performance computing products *Silicon Graphics International, formerly Rac ...

and

systems *

–

File System; not to be confused with other file systems named zFS or ZFS. *

- an IBM research project to develop a distributed, decentralized file system; not to be confused with other file systems named zFS or ZFS. *

ZFS 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 ope ...

a combined file system and logical volume manager designed by

Sun Microsystems Sun Microsystems, Inc. (Sun for short) was an American technology company that sold computers, computer components, software, and information technology services and created the Java programming language, the Solaris operating system, ZFS, the ...

File systems with built-in fault-tolerance

These file systems have built-in checksumming and either mirroring or parity for extra redundancy on one or several block devices: *

Bcachefs Bcachefs is a copy-on-write (COW) file system for Linux-based operating systems. Its primary developer, Kent Overstreet, first announced it in 2015, and efforts are ongoing to have it included in the mainline Linux kernel. It is intended to compete ...

– It's not yet upstream, full data and metadata checksumming,

bcache bcache (abbreviated from ''block cache'') is a cache in the Linux kernel's block layer, which is used for accessing secondary storage devices. It allows one or more fast storage devices, such as flash-based solid-state drives (SSDs), to act as ...

is the bottom half of the filesystem. *

– A file system based on

B-Tree In computer science, a B-tree is a self-balancing tree data structure that maintains sorted data and allows searches, sequential access, insertions, and deletions in logarithmic time. The B-tree generalizes the binary search tree, allowing for ...

s, initially designed at

Oracle Corporation Oracle Corporation is an American multinational computer technology corporation headquartered in Austin, Texas. In 2020, Oracle was the third-largest software company in the world by revenue and market capitalization. The company sells da ...

. *

and

–

's primary filesystems, created by

Matt Dillon Matthew Raymond Dillon (born February 18, 1964) is an American actor. He has received various accolades, including an Oscar and Grammy nomination. Dillon made his feature film debut in '' Over the Edge'' (1979) and established himself as a te ...

. *

NOVA A nova (plural novae or novas) is a transient astronomical event that causes the sudden appearance of a bright, apparently "new" star (hence the name "nova", which is Latin for "new") that slowly fades over weeks or months. Causes of the dramati ...

– The "non-volatile memory accelerated" file system for persistent main memory. * ReFS (Resilient File System) – A file system by

with built-in resiliency features. * Reliance – A transactional file system with CRCs, created by Datalight. * Reliance Nitro – A tree-based transactional file system with CRCs, developed for high performance and reliability in embedded systems, from Datalight. * WekaFS – a shared parallel filesystem that delivers extreme performance at any scale and is optimized for NVMe and the hybrid cloud. *

– Has checksums for all data; important metadata is always redundant, additional redundancy levels are user-configurable;

and transactional writing ensure metadata consistency; corrupted data can be automatically repaired if a redundant copy is available. Created by

for use on

10 and

OpenSolaris OpenSolaris () is a discontinued open-source computer operating system based on Solaris and created by Sun Microsystems. It was also, perhaps confusingly, the name of a project initiated by Sun to build a developer and user community around th ...

, ported to

FreeBSD FreeBSD is a free and open-source Unix-like operating system descended from the Berkeley Software Distribution (BSD), which was based on Research Unix. The first version of FreeBSD was released in 1993. In 2005, FreeBSD was the most popular ...

7.0,

NetBSD NetBSD is a free and open-source Unix operating system based on the Berkeley Software Distribution (BSD). It was the first open-source BSD descendant officially released after 386BSD was forked. It continues to be actively developed and is a ...

(as of August 2009),

and to

FUSE Fuse or FUSE may refer to: Devices * Fuse (electrical), a device used in electrical systems to protect against excessive current ** Fuse (automotive), a class of fuses for vehicles * Fuse (hydraulic), a device used in hydraulic systems to protect ...

(not to be confused with the two zFSes from IBM)

File systems optimized for flash memory, solid state media

Solid state media, such as

flash memory Flash memory is an electronic non-volatile computer memory storage medium that can be electrically erased and reprogrammed. The two main types of flash memory, NOR flash and NAND flash, are named for the NOR and NAND logic gates. Both us ...

, are similar to disks in their interfaces, but have different problems. At low level, they require special handling such as

wear leveling Wear leveling (also written as wear levelling) is a technique Wear leveling techniques for flash memory systems. for prolonging the service life of some kinds of erasable computer storage media, such as flash memory, which is used in solid-state d ...

and different error detection and correction algorithms. Typically a device such as a

solid-state drive A solid-state drive (SSD) is a solid-state storage device that uses integrated circuit assemblies to store data persistently, typically using flash memory, and functioning as secondary storage in the hierarchy of computer storage. It is ...

handles such operations internally and therefore a regular file system can be used. However, for certain specialized installations (embedded systems, industrial applications) a file system optimized for plain flash memory is advantageous. *

– Apple File System is a next-generation file system for Apple products. * CHFS – a

filesystem for

embedded system An embedded system is a computer system—a combination of a computer processor, computer memory, and input/output peripheral devices—that has a dedicated function within a larger mechanical or electronic system. It is ''embedded'' as ...

s optimised for raw flash media. *

exFAT exFAT (Extensible File Allocation Table) is a file system introduced by Microsoft in 2006 and optimized for flash memory such as USB flash drives and SD cards. exFAT was proprietary until 28 August 2019, when Microsoft published its specificati ...

–

proprietary system intended for flash cards (see also XCFiles, an exFAT implementation for Wind River

VxWorks VxWorks is a real-time operating system (or RTOS) developed as proprietary software by Wind River Systems, a wholly-owned subsidiary of Aptiv. First released in 1987, VxWorks is designed for use in embedded systems requiring real-time, determi ...

and other embedded operating systems). * ExtremeFFS – internal filesystem for SSDs. *

F2FS F2FS (Flash-Friendly File System) is a flash file system initially developed by Samsung Electronics for the Linux kernel. The motive for F2FS was to build a file system that, from the start, takes into account the characteristics of NAND flash ...

– Flash-Friendly File System. An open source Linux file system introduced by

Samsung The Samsung Group (or simply Samsung) ( ko, 삼성 ) is a South Korean multinational manufacturing conglomerate headquartered in Samsung Town, Seoul, South Korea. It comprises numerous affiliated businesses, most of them united under the ...

in 2012. * FFS2 (presumably preceded by FFS1), one of the earliest flash file systems. Developed and patented by

in the early 1990s. *

JFFS The Journaling Flash File System (or JFFS) is a log-structured file system for use on NOR flash memory devices on the Linux operating system. It has been superseded by JFFS2. Design Flash memory (specifically NOR flash) must be erased prio ...

– original log structured Linux file system for NOR flash media. *

JFFS2 Journalling Flash File System version 2 or JFFS2 is a log-structured file system for use with flash memory devices. It is the successor to JFFS. JFFS2 has been included into the Linux kernel since September 23, 2001, when it was merged into the ...

– successor of JFFS, for NAND and NOR flash. * LSFS – a

Log-structured file system A log-structured filesystem is a file system in which data and metadata are written sequentially to a circular buffer, called a log. The design was first proposed in 1988 by John K. Ousterhout and Fred Douglis and first implemented in 1992 by ...

with writable snapshots and inline data deduplication created by

StarWind Software StarWind Software, Inc. is a privately held Beverly, Massachusetts-based computer software and hardware appliance company specializing in storage virtualization and software-defined storage. History StarWind Software began in 2008 as a spin ...

. Uses DRAM and flash to cache spinning disks. *

LogFS LogFS is a Linux log-structured and scalable flash file system, intended for use on large devices of flash memory. It is written by Jörn Engel and in part sponsored by the CE Linux Forum. LogFS was introduced in the mainline Linux kernel in v ...

– intended to replace JFFS2, better scalability. No longer under active development. *

– a log-structured file system for Linux with continuous snapshots. *

Non-Volatile File System Non-Volatile File System (NVFS) is a flash memory file system introduced in the release of Palm's Personal Digital Assistant handheld models Tungsten T5, Tungsten E2, Palm TX, Z22, Treo 650/700/ 680/ 755p, and Palm Centro. Background Overview ...

– the system for

introduced by

Palm, Inc. Palm, Inc. was an American company that specialized in manufacturing personal digital assistants (PDAs) and various other electronics. They were the designer of the PalmPilot, the first PDA successfully marketed worldwide, as well as the Treo 6 ...

– the "non-volatile memory accelerated" file system for persistent main memory. *

– a filesystem utilized by

. It supports selective placement of meta-data directly onto flash SSD. *

Segger Microcontroller Systems Segger Microcontroller, founded in 1992, is a private company involved in the embedded systems industry. It provides products used to develop and manufacture four categories of embedded systems: real-time operating systems (RTOS) and software l ...

emFile – filesystem for deeply embedded applications which supports both NAND and NOR flash. Wear leveling, fast read and write, and very low RAM usage. * SPIFFS – SPI Flash File System, a wear-leveling filesystem intended for small NOR flash devices. *

TFAT Transaction-Safe FAT File System (TFAT) and Transaction-Safe Extended FAT File System (TexFAT) refer to two file systems used in Microsoft products to provide transaction-safety for data stored on a disk. The goal is to reduce the risk of data loss ...

– a transactional version of the FAT filesystem. * TrueFFS – internal file system for SSDs, implementing error correction, bad block re-mapping and wear-leveling. *

UBIFS UBIFS (UBI File System, more fully Unsorted Block Image File System) is a flash file system for unmanaged flash memory devices. UBIFS works on top of an UBI (unsorted block image) layer, which is itself on top of a memory technology device (MT ...

– successor of JFFS2, optimized to utilize NAND and NOR flash. *

Write Anywhere File Layout The Write Anywhere File Layout (WAFL) is a proprietary file system that supports large, high-performance RAID arrays, quick restarts without lengthy consistency checks in the event of a crash or power failure, and growing the filesystems size q ...

(WAFL) – an internal file system utilized by

NetApp NetApp, Inc. is an American hybrid cloud data services and data management company headquartered in San Jose, California. It has ranked in the Fortune 500 from 2012–2021. Founded in 1992 with an IPO in 1995, NetApp offers cloud data services ...

within their DataONTAP OS, originally optimized to use non-volatile DRAM. WAFL uses RAID-DP to protect against multiple disk failures and NVRAM for transaction log replays. *

YAFFS Yaffs (Yet Another Flash File System) is a file system designed and written by Charles Manning for the company Aleph One. Yaffs1 was the first version of this file system and was designed for the then-current NAND chips with 512 byte page size ( ...

– a log-structured file system designed for NAND flash, but also used with NOR flash.
LittleFS
– a little fail-safe filesystem designed for microcontrollers. * JesFS – Jo's embedded serial FileSystem. A very small footprint and robust filesystem, designed for very small microcontroller (16/32 bit). Open Source and licensed under GPL v3.

Record-oriented file systems

In record-oriented file systems files are stored as a collection of

records A record, recording or records may refer to: An item or collection of data Computing * Record (computer science), a data structure ** Record, or row (database), a set of fields in a database related to one entity ** Boot sector or boot record, ...

. They are typically associated with mainframe and

minicomputer A minicomputer, or colloquially mini, is a class of smaller general purpose computers that developed in the mid-1960s and sold at a much lower price than mainframe and mid-size computers from IBM and its direct competitors. In a 1970 survey, ...

operating systems. Programs read and write whole records, rather than bytes or arbitrary byte ranges, and can seek to a record boundary but not within records. The more sophisticated record-oriented file systems have more in common with simple

database In computing, a database is an organized collection of data stored and accessed electronically. Small databases can be stored on a file system, while large databases are hosted on computer clusters or cloud storage. The design of databases sp ...

s than with other file systems. *

CMS file system The CMS file system is the native file system of IBM's Conversational Monitor System (CMS), a component of VM . It was the only file system for CMS until the introduction of the CMS Shared File System with VM/SP. Minidisks CP-67 and VM allow a ...

– The native file system of the

Conversational Monitor System The Conversational Monitor System (CMS – originally: "Cambridge Monitor System") is a simple interactive computing, interactive single-user operating system. CMS was originally developed as part of IBM's CP/CMS operating system, which went ...

component of

VM/370 VM (often: VM/CMS) is a family of IBM virtual machine operating systems used on IBM mainframes System/370, System/390, zSeries, System z and compatible systems, including the Hercules (emulator), Hercules emulator for personal computers. The ...

– early versions were record-oriented; support for "streams" was added later *

Michigan Terminal System The Michigan Terminal System (MTS) is one of the first time-sharing computer operating systems.. Developed in 1967 at the University of Michigan for use on IBM S/360-67, S/370 and compatible mainframe computers, it was developed and used by a con ...

(MTS) – provides "line files" where record lengths and line numbers are associated as metadata with each record in the file, lines can be added, replaced, updated with the same or different length records, and deleted anywhere in the file without the need to read and rewrite the entire file. * OS4000 for GEC's OS4000 operating system, on the

GEC 4000 series The GEC 4000 was a series of 16/ 32-bit minicomputers produced by GEC Computers Ltd in the United Kingdom during the 1970s, 1980s and early 1990s. History GEC Computers was formed in 1968 as a business unit of the GEC conglomerate. It ...

minicomputers * A

and

(and

) extension to support database-like file types ''random file'', ''direct file'', ''keyed file'' and ''sequential file'' in Digital Research

FlexOS FlexOS is a discontinued modular real-time multiuser computer multitasking, multitasking operating system (RTOS) designed for computer-integrated manufacturing, laboratory, retail and financial markets. Developed by Digital Research's Flexible ...

, IBM

4680 OS FlexOS is a discontinued modular real-time multiuser multitasking operating system (RTOS) designed for computer-integrated manufacturing, laboratory, retail and financial markets. Developed by Digital Research's Flexible Automation Business U ...

and Toshiba 4690 OS.IBM. ''4690 OS Programming Guide Version 5.2'', IBM document SC30-4137-01, 2007-12-06 ( tp://ftp.software.ibm.com/software/retail/pubs/sw/opsys/4690/ver5r2/bsi1_PG_mst.pdf. The record size is stored on a file-by-file basis in special entries in the directory table.Caldera (1997). ''Caldera OpenDOS Machine Readable Source Kit 7.01''. The FDOS.EQU file in the machine readable source kit has equates for the corresponding directory entries. * Sequential access methods for IBM's

and

z/VSE VSEn (''Virtual Storage Extended'') is an operating system for IBM mainframe computers, the latest one in the DOS/360 lineage, which originated in 1965. DOS/VSE was introduced in 1979 as a successor to DOS/VS; in turn, DOS/VSE was succeeded by ...

mainframe operating systems:

Basic Sequential Access Method In IBM mainframe operating systems, Basic sequential access method (BSAM) is an access method to read and write datasets sequentially. BSAM is available on OS/360, OS/VS2, MVS, z/OS, and related operating systems. BSAM is used for devices that ...

(BSAM),

Basic Partitioned Access Method In IBM mainframe operating systems, basic partitioned access method (BPAM) is an access method for Library (computing), libraries, called partitioned datasets (PDSes) in IBM terminology. BPAM is used in OS/360, OS/VS2, MVS, z/OS, and others. A PDS ...

(BPAM) and

Queued Sequential Access Method In IBM mainframe operating systems, queued sequential access method (QSAM) is an access method to read and write data set (IBM mainframe), datasets sequentially. QSAM is available on OS/360, OS/VS2, MVS, z/OS, and related operating systems. QSAM i ...

(QSAM); see

Access methods An access method is a function of a mainframe operating system that enables access to data on disk, tape or other external devices. Access methods were present in several mainframe operating systems since the late 1950s, under a variety of name ...

and

Data set (IBM mainframe) In the context of IBM mainframe computers in the S/360 line, a data set (IBM preferred) or dataset is a computer file having a record organization. Use of this term began with, e.g., DOS/360, OS/360, and is still used by their successors, incl ...

for more examples *

Pick Operating System The Pick Operating System (Pick System or Pick) is a demand-paged, multi-user, virtual memory, time-sharing computer operating system based around a MultiValue database. Pick is used primarily for business data processing. It is named after one o ...

– A record-oriented filesystem and database that uses hash-coding to store data. * Shared File System (SFS) for IBM's VM *

Virtual Storage Access Method Virtual Storage Access Method (VSAM) is an IBM DASD file storage access method, first used in the OS/VS1, OS/VS2 Release 1 (SVS) and Release 2 (MVS) operating systems, later used throughout the Multiple Virtual Storage (MVS) architecture and n ...

(VSAM) for IBM's

and

mainframe operating systems

Shared-disk file systems

Shared-disk file systems (also called ''shared-storage file systems'',

SAN file system The SAN File System (SFS) is a high-performance, clustered file system created by the company DataPlow. SFS enables fast access to shared files located on shared, storage area network (SAN)-attached storage devices. SFS utilizes the high-speed, ...

, Clustered file system or even ''cluster file systems'') are primarily used in a

storage area network A storage area network (SAN) or storage network is a computer network which provides access to consolidated, block-level data storage. SANs are primarily used to access data storage devices, such as disk arrays and tape libraries from serve ...

where all nodes directly access the

block storage In computing (specifically data transmission and data storage), a block, sometimes called a physical record, is a sequence of bytes or bits, usually containing some whole number of records, having a maximum length; a ''block size''. Data thu ...

where the file system is located. This makes it possible for nodes to fail without affecting access to the file system from the other nodes. Shared-disk file systems are normally used in a

high-availability cluster High-availability clusters (also known as HA clusters, fail-over clusters) are groups of computers that support server applications that can be reliably utilized with a minimum amount of down-time. They operate by using high availability softwa ...

together with storage on hardware

RAID Raid, RAID or Raids may refer to: Attack * Raid (military), a sudden attack behind the enemy's lines without the intention of holding ground * Corporate raid, a type of hostile takeover in business * Panty raid, a prankish raid by male college ...

. Shared-disk file systems normally do not scale over 64 or 128 nodes. Shared-disk file systems may be

symmetric Symmetry (from grc, συμμετρία "agreement in dimensions, due proportion, arrangement") in everyday language refers to a sense of harmonious and beautiful proportion and balance. In mathematics, "symmetry" has a more precise definiti ...

where

metadata Metadata is "data that provides information about other data", but not the content of the data, such as the text of a message or the image itself. There are many distinct types of metadata, including: * Descriptive metadata – the descriptive ...

is distributed among the nodes or asymmetric with centralized

servers. *

CXFS The CXFS file system (Clustered XFS) is a proprietary software, proprietary shared disk file system designed by Silicon Graphics (SGI) specifically to be used in a storage area network (SAN) environment. A significant difference between CXFS and o ...

(Clustered XFS) from

Silicon Graphics Silicon Graphics, Inc. (stylized as SiliconGraphics before 1999, later rebranded SGI, historically known as Silicon Graphics Computer Systems or SGCS) was an American high-performance computing manufacturer, producing computer hardware and soft ...

(SGI). Available for Linux, Mac, Windows, Solaris, AIX and IRIX,. Asymmetric. * Dell Fluid File System (formerly ExaFS)

proprietary software Proprietary software is software that is deemed within the free and open-source software to be non-free because its creator, publisher, or other rightsholder or rightsholder partner exercises a legal monopoly afforded by modern copyright and int ...

sold by

Dell Dell is an American based technology company. It develops, sells, repairs, and supports computers and related products and services. Dell is owned by its parent company, Dell Technologies. Dell sells personal computers (PCs), servers, data ...

. Shared-disk system sold as an appliance providing distributed file systems to clients. Running on Intel based hardware serving NFS v2/v3, SMB/CIFS and AFP to

Windows Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for serv ...

macOS macOS (; previously OS X and originally Mac OS X) is a Unix operating system developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac computers. Within the market of desktop and lapt ...

and other

UNIX Unix (; trademarked as UNIX) is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, whose development started in 1969 at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and ot ...

clients. *

Blue Whale Clustered file system Blue Whale Clustered file system (BWFS) is a shared disk file system (also called clustered file system, ''shared storage file systems'' or SAN file system) made by Tianjin Zhongke Blue Whale Information Technologies Company in China. Overview ...

(BWFS) from Zhongke Blue Whale. Asymmetric. Available for

, and

. *

SAN File System The SAN File System (SFS) is a high-performance, clustered file system created by the company DataPlow. SFS enables fast access to shared files located on shared, storage area network (SAN)-attached storage devices. SFS utilizes the high-speed, ...

(SFS) from DataPlow. Available for Windows, Linux, Solaris, and macOS. Symmetric and Asymmetric. * EMC Celerra HighRoad from EMC. Available for Linux, AIX, HP-UX, IRIX, Solaris and Windows. Asymmetric. *

VMScluster A VMScluster, originally known as a VAXcluster, is a computer cluster involving a group of computers running the OpenVMS operating system. Whereas tightly coupled multiprocessor systems run a single copy of the operating system, a VMScluster is l ...

s, released by DEC in 1983, now from HP. Symmetric. *

GFS2 In computing, the Global File System 2 or GFS2 is a shared-disk file system for Linux computer clusters. GFS2 allows all members of a cluster to have direct concurrent access to the same shared block storage, in contrast to distributed file sy ...

(''Global File System'') from

Red Hat Red Hat, Inc. is an American software company that provides open source software products to enterprises. Founded in 1993, Red Hat has its corporate headquarters in Raleigh, North Carolina, with other offices worldwide. Red Hat has become ass ...

. Available for Linux under

GPL The GNU General Public License (GNU GPL or simply GPL) is a series of widely used free software licenses that guarantee end users the four freedoms to run, study, share, and modify the software. The license was the first copyleft for general u ...

. Symmetric ( GDLM) or Asymmetric ( GULM). *

IBM General Parallel File System GPFS (General Parallel File System, brand name IBM Spectrum Scale) is high-performance clustered file system software developed by IBM. It can be deployed in shared-disk or shared-nothing distributed parallel modes, or a combination of these. It ...

(GPFS) Windows, Linux, AIX . Parallel *

Nasan The Nasan Clustered File System is a shared disk file system created by the company DataPlow. Nasan software enables high-speed access to shared files located on shared, storage area network (SAN)-attached storage devices by utilizing the high-perfo ...

Clustered File System from DataPlow. Available for Linux and Solaris. Asymmetric. *

Oracle ACFS Automatic Storage Management (ASM) is a feature provided by Oracle Corporation within the Oracle Database from release Oracle 10g (revision 1) onwards. ASM aims to simplify the management of database datafiles, control files and log files. To do ...

from

. Available for Linux (

Red Hat Enterprise Linux Red Hat Enterprise Linux (RHEL) is a commercial open-source Linux distribution developed by Red Hat for the commercial market. Red Hat Enterprise Linux is released in server versions for x86-64, Power ISA, ARM64, and IBM Z and a desktop version ...

5 and

Oracle Enterprise Linux Oracle Linux (abbreviated OL, formerly known as Oracle Enterprise Linux or OEL) is a Linux distribution packaged and freely distributed by Oracle, available partially under the GNU General Public License since late 2006. It is compiled from Red ...

5 only). Symmetric. *

OCFS2 The Oracle Cluster File System (OCFS, in its second version OCFS2) is a shared disk file system developed by Oracle Corporation and released under the GNU General Public License. The first version of OCFS was developed with the main focus to accom ...

(''Oracle Cluster File System'') from

. Available for Linux under

. Symmetric. *

QFS QFS (Quick File System) is a filesystem from Oracle. It is tightly integrated with SAM, the Storage and Archive Manager, and hence is often referred to as SAM-QFS. SAM provides the functionality of a hierarchical storage manager. Features QFS ...

from

. Available for Linux (client only) and Solaris (metadata server and client). Asymmetric. * ScoutFS from Versity. Available for Linux under the

. Symmetric. * StorNext File System from

Quantum In physics, a quantum (plural quanta) is the minimum amount of any physical entity (physical property) involved in an interaction. The fundamental notion that a physical property can be "quantized" is referred to as "the hypothesis of quantizati ...

. Asymmetric. Available for

and

. Interoperable with

Xsan Xsan () is Apple Inc.'s storage area network (SAN) or clustered file system for macOS. Xsan enables multiple Mac desktop and Xserve systems to access shared block storage over a Fibre Channel network. With the Xsan file system installed, these ...

. Formerly known as CVFS. *

Veritas Storage Foundation Veritas Storage Foundation (VSF ), previously known as Veritas Foundation Suite, is a computer software product made by Veritas Software that combines Veritas Volume Manager (VxVM) and Veritas File System (VxFS) to provide online-storage managem ...

from Symantec. Available for AIX, HP-UX, Linux and Solaris. Asymmetric. *

from

Apple Inc. Apple Inc. is an American multinational technology company headquartered in Cupertino, California, United States. Apple is the largest technology company by revenue (totaling in 2021) and, as of June 2022, is the world's biggest company ...

Available for macOS. Asymmetric. Interoperable with StorNext File System. *

VMFS VMware VMFS (Virtual Machine File System) is VMware, Inc.'s clustered file system used by the company's flagship server virtualization suite, vSphere. It was developed to store Virtual machine image, virtual machine disk images, including snapsho ...

from

VMware VMware, Inc. is an American cloud computing and virtualization technology company with headquarters in Palo Alto, California. VMware was the first commercially successful company to virtualize the x86 architecture. VMware's desktop software ru ...

EMC Corporation Dell EMC (EMC Corporation until 2016) is an American multinational corporation headquartered in Hopkinton, Massachusetts and Round Rock, Texas, United States. Dell EMC sells data storage, information security, virtualization, analytics, cloud ...

. Available for

VMware ESX Server VMware ESXi (formerly ESX) is an enterprise-class, type-1 hypervisor developed by VMware for deploying and serving virtual computers. As a type-1 hypervisor, ESXi is not a software application that is installed on an operating system (OS); ...

. Symmetric.

Distributed file systems

Distributed file system A clustered file system is a file system which is shared by being simultaneously mounted on multiple servers. There are several approaches to clustering, most of which do not employ a clustered file system (only direct attached storage for ...

s are also called network file systems. Many implementations have been made, they are location dependent and they have

access control lists In computer security, an access-control list (ACL) is a list of File-system permissions, permissions associated with a system resource (object). An ACL specifies which User (computing), users or Process (computing), system processes are granted acc ...

(ACLs), unless otherwise stated below. * 9P, the

and

Inferno Inferno may refer to: * Hell, an afterlife place of suffering * Conflagration, a large uncontrolled fire Film * ''L'Inferno'', a 1911 Italian film * Inferno (1953 film), ''Inferno'' (1953 film), a film noir by Roy Ward Baker * Inferno (1973 fi ...

distributed file system protocol. One implementation is

v9fs Plan 9 from User Space (also plan9port or p9p) is a port of many Plan 9 from Bell Labs libraries and applications to Unix-like operating systems. Currently it has been tested on a variety of operating systems including: Linux, macOS, FreeBSD, Net ...

. No ACLs. *

Amazon S3 Amazon S3 or Amazon Simple Storage Service is a service offered by Amazon Web Services (AWS) that provides object storage through a web service interface. Amazon S3 uses the same scalable storage infrastructure that Amazon.com uses to run its ...

Andrew File System The Andrew File System (AFS) is a distributed file system which uses a set of trusted servers to present a homogeneous, location-transparent file name space to all the client workstations. It was developed by Carnegie Mellon University as part of t ...

(AFS) is scalable and location independent, has a heavy client

cache Cache, caching, or caché may refer to: Places United States * Cache, Idaho, an unincorporated community * Cache, Illinois, an unincorporated community * Cache, Oklahoma, a city in Comanche County * Cache, Utah, Cache County, Utah * Cache County ...

and uses Kerberos for authentication. Implementations include the original from IBM (earlier

Transarc Transarc Corporation was a private Pittsburgh-based software company founded in 1989 by Jeffrey Eppinger, Michael L. Kazar, Alfred Spector, and Dean Thompson of Carnegie Mellon University. Transarc commercialized the Andrew File System (AFS), ...

), Arla and

OpenAFS OpenAFS is an open-source implementation of the Andrew distributed file system (AFS). AFS was originally developed at Carnegie Mellon University, and developed as a commercial product by the Transarc Corporation, which was subsequently acquired b ...

. *

Avere Systems Avere Systems was a privately held technology company that produces computer data storage and data management infrastructure. The company was founded in 2008 and is based in Pittsburgh, Pennsylvania. As of March 2017, the company had raised over ...

has AvereOS that creates a

NAS Nas (born 1973) is the stage name of American rapper Nasir Jones. Nas, NaS, or NAS may also refer to: Aviation * Nasair, a low-cost airline carrier and subsidiary based in Eritrea * National Air Services, an airline in Saudi Arabia ** Nas Air ( ...

protocol file system in

object storage Object storage (also known as object-based storage) is a computer data storage that manages data as objects, as opposed to other storage architectures like file systems which manages data as a file hierarchy, and block storage which manages data a ...

. *

DCE Distributed File System {{Distinguish, Distributed File System (Microsoft) The DCE Distributed File System (DCE/DFS)

( DCE/DFS) from IBM (earlier

) is similar to AFS and focus on full

POSIX The Portable Operating System Interface (POSIX) is a family of standards specified by the IEEE Computer Society for maintaining compatibility between operating systems. POSIX defines both the system- and user-level application programming interf ...

file system semantics and

high availability High availability (HA) is a characteristic of a system which aims to ensure an agreed level of operational performance, usually uptime, for a higher than normal period. Modernization has resulted in an increased reliance on these systems. Fo ...

. Available for

and

under a

license. * File Access Listener (FAL) is an implementation of the Data Access Protocol (DAP) which is part of the

DECnet DECnet is a suite of network protocols created by Digital Equipment Corporation. Originally released in 1975 in order to connect two PDP-11 minicomputers, it evolved into one of the first peer-to-peer network architectures, thus transforming DEC ...

suite of

network protocols A communication protocol is a system of rules that allows two or more entities of a communications system to transmit information via any kind of variation of a physical quantity. The protocol defines the rules, syntax, semantics and synchroniza ...

created by

. *

Magma Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural sa ...

, developed by Tx0. *

MapR FS The MapR File System (MapR FS) is a clustered file system that supports both very large-scale and high-performance uses. MapR FS supports a variety of interfaces including conventional read/write file access via NFS and a FUSE interface, as well ...

is a distributed high-performance file system that exhibits file, table and messaging APIs. *

Microsoft Office Groove Microsoft SharePoint Workspace (formerly Microsoft Office Groove) is a discontinued desktop application designed for document collaboration in teams with members who are regularly off-line or who do not share the same network security clearance. I ...

shared workspace, used for DoHyki *

NetWare Core Protocol The NetWare Core Protocol (NCP) is a network protocol used in some products from Novell, Inc. It is usually associated with the client-server operating system Novell NetWare which originally supported primarily MS-DOS client stations, but later su ...

(NCP) from

Novell Novell, Inc. was an American software and services company headquartered in Provo, Utah, that existed from 1980 until 2014. Its most significant product was the multi-platform network operating system known as Novell NetWare. Under the lead ...

is used in networks based on

. *

Network File System Network File System (NFS) is a distributed file system protocol originally developed by Sun Microsystems (Sun) in 1984, allowing a user on a client computer to access files over a computer network much like local storage is accessed. NFS, like ...

(NFS) originally from

is the standard in UNIX-based networks. NFS may use Kerberos authentication and a client

. * OS4000 Linked-OS provides distributed filesystem across OS4000 systems. *

Self-certifying File System In computing, Self-certifying File System (SFS) is a global and decentralized, distributed file system for Unix-like operating systems, while also providing transparent encryption of communications as well as authentication. It aims to be the univer ...

(SFS), a global network file system designed to securely allow access to file systems across separate administrative domains. *

Server Message Block Server Message Block (SMB) is a communication protocol originally developed in 1983 by Barry A. Feigenbaum at IBM and intended to provide shared access to files and printers across nodes on a network of systems running IBM's OS/2. It also provides ...

(SMB) originally from IBM (but the most common version is modified heavily by

) is the standard in Windows-based networks. SMB is also known as ''Common Internet File System (CIFS)''. SMB may use Kerberos authentication.

Distributed fault-tolerant file systems

Distributed

fault-tolerant Fault tolerance is the property that enables a system to continue operating properly in the event of the failure of one or more faults within some of its components. If its operating quality decreases at all, the decrease is proportional to the ...

replication of data between nodes (between servers or servers/clients) for

and

offline In computer technology and telecommunications, online indicates a state of connectivity and offline indicates a disconnected state. In modern terminology, this usually refers to an Internet connection, but (especially when expressed "on line" or ...

(disconnected) operation. *

Coda Coda or CODA may refer to: Arts, entertainment, and media Films * Movie coda, a post-credits scene * ''Coda'' (1987 film), an Australian horror film about a serial killer, made for television *''Coda'', a 2017 American experimental film from Na ...

from

Carnegie Mellon University Carnegie Mellon University (CMU) is a private research university in Pittsburgh, Pennsylvania. One of its predecessors was established in 1900 by Andrew Carnegie as the Carnegie Technical Schools; it became the Carnegie Institute of Technology ...

focuses on bandwidth-adaptive operation (including disconnected operation) using a client-side cache for mobile computing. It is a descendant of AFS-2. It is available for

under the

. *

Distributed File System A clustered file system is a file system which is shared by being simultaneously mounted on multiple servers. There are several approaches to clustering, most of which do not employ a clustered file system (only direct attached storage for ...

(Dfs) from

focuses on location transparency and

. Available for

under a

license. *

and

–

's filesystems for clustered storage, created by

. *

InterMezzo In music, an intermezzo (, , plural form: intermezzi), in the most general sense, is a composition which fits between other musical or dramatic entities, such as acts of a play or movements of a larger musical work. In music history, the term ha ...

from Cluster File Systems uses synchronization over

HTTP The Hypertext Transfer Protocol (HTTP) is an application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web, ...

. Available for

under

but no longer in development since the developers are working on

Lustre Lustre or Luster may refer to: Places * Luster, Norway, a municipality in Vestlandet, Norway ** Luster (village), a village in the municipality of Luster * Lustre, Montana, an unincorporated community in the United States Entertainment * '' ...

. *

LizardFS LizardFS is an open source distributed file system that is POSIX-compliant and licensed under GPLv3. It was released in 2013 as fork of MooseFS. LizardFS is also offering a paid Technical Support (Standard, Enterprise and Enterprise Plus) with p ...

a networking, distributed file system based on MooseFS *

Moose File System Moose File System (MooseFS) is an open-source, POSIX-compliant distributed file system developed by Core Technology. MooseFS aims to be fault-tolerant, highly available, highly performing, scalable general-purpose network distributed file syste ...

(MooseFS) is a networking, distributed file system. It spreads data over several physical locations (servers), which are visible to a user as one resource. Works on Linux, FreeBSD, NetBSD, OpenSolaris and macOS. Master server and chunkservers can also run on Solaris and Windows with Cygwin. * Scality is a distributed fault-tolerant filesystem. *

Tahoe-LAFS Tahoe-LAFS (Tahoe Least-Authority File Store) is a free and open, secure, decentralized, fault-tolerant, distributed data store and distributed file system. It can be used as an online backup system, or to serve as a file or Web host similar to ...

is an open source secure, decentralized, fault-tolerant filesystem utilizing encryption as the basis for a least-authority replicated design. * A

and

(and

) extension to support automatic file distribution across nodes with extra attributes like ''local'', ''mirror on update'', ''mirror on close'', ''compound on update'', ''compound on close'' in IBM

and Toshiba 4690 OS. The distribution attributes are stored on a file-by-file basis in special entries in the directory table.IBM (2003). ''Information about 4690 OS unique file distribution attributes'', IBM document R1001487, 2003-07-30. (): " ..file types are stored in the "Reserved bits" portion of the PC-DOS file directory structure ..only 4690 respects and preserves these attributes. Various non-4690 operating systems take different actions if these bits are turned on ..when copying from a diskette created on a 4690 system. ..PC-DOS and Windows 2000 Professional will copy the file without error and zero the bits. OS/2 ..1.2 ..will refuse to copy the file unless ..first run CHKDSK /F on the file. After ..CHKDSK, it will copy the file and zero the bits. ..when ..copy ..back to the 4690 system, ..file will copy as a local file."IBM. ''4690 save and restore file distribution attributes''. IBM document R1000622, 2010-08-31 ().

Distributed parallel file systems

Distributed

parallel Parallel is a geometric term of location which may refer to: Computing * Parallel algorithm * Parallel computing * Parallel metaheuristic * Parallel (software), a UNIX utility for running programs in parallel * Parallel Sysplex, a cluster of ...

file systems stripe data over multiple servers for high performance. They are normally used in high-performance computing (HPC). Some of the distributed parallel file systems use an

object storage device Object may refer to: General meanings * Object (philosophy), a thing, being, or concept ** Object (abstract), an object which does not exist at any particular time or place ** Physical object, an identifiable collection of matter * Goal, an ...

(OSD) (in Lustre called OST) for chunks of data together with centralized

servers. *

is an

open-source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...

high-performance distributed parallel file system for Linux, used on many of the largest computers in the world. * Parallel Virtual File System (PVFS, PVFS2, OrangeFS). Developed to store virtual system images, with a focus on non-shared writing optimizations. Available for

under

Distributed parallel fault-tolerant file systems

Distributed file systems, which also are

and

fault tolerant Fault tolerance is the property that enables a system to continue operating properly in the event of the failure of one or more faults within some of its components. If its operating quality decreases at all, the decrease is proportional to the ...

, stripe and replicate data over multiple servers for high performance and to maintain

data integrity Data integrity is the maintenance of, and the assurance of, data accuracy and consistency over its entire Information Lifecycle Management, life-cycle and is a critical aspect to the design, implementation, and usage of any system that stores, proc ...

. Even if a server fails no data is lost. The file systems are used in both high-performance computing (HPC) and

s. All file systems listed here focus on

scalability Scalability is the property of a system to handle a growing amount of work by adding resources to the system. In an economic context, a scalable business model implies that a company can increase sales given increased resources. For example, a ...

and high performance unless otherwise stated below. In development: *

from IBM (not to be confused with

from

or the zFS file system provided with IBM's

operating system) focus on cooperative cache and

distributed transactions A distributed transaction is a database transaction in which two or more network hosts are involved. Usually, hosts provide transactional resources, while the transaction manager is responsible for creating and managing a global transaction that enc ...

and uses

s. Under development and not freely available. *

/ANVIL by

* PNFS (Parallel NFS) – Clients available for

and

and back-ends from

Panasas Panasas is a data storage company that creates network-attached storage for technical computing environments. History Panasas is a computer data storage product company and is headquartered in San Jose, California. Panasas received seed funding ...

, EMC Highroad and IBM

GPFS GPFS (General Parallel File System, brand name IBM Spectrum Scale) is high-performance clustered file system software developed by IBM. It can be deployed in shared-disk or shared-nothing distributed parallel modes, or a combination of these. It ...

* Coherent Remote File System (CRFS) – requires

* Parallel Optimized Host Message Exchange Layered File System (POHMELFS) and Distributed STorage (DST). POSIX compliant, added to Linux kernel 2.6.30

Peer-to-peer file systems

Some of these may be called

cooperative storage cloud A cooperative storage cloud is a decentralized model of networked computer data storage, online storage where data is stored on multiple computers (Node (networking), nodes), hosted by the participants cooperating in the cloud. For the cooperative ...

. *

Cleversafe IBM Cloud Object Storage is a service offered by IBM for storing and accessing unstructured data. The object storage service can be deployed on-premise, as part of IBM Cloud Platform offerings, or in hybrid form. The offering can store any ty ...

uses Cauchy Reed–Solomon information dispersal algorithms to separate data into unrecognizable slices and distribute them, via secure Internet connections, to multiple storage locations. * Scality is a distributed filesystem using the Chord peer-to-peer protocol. *

IPFS The InterPlanetary File System (IPFS) is a protocol, hypermedia and file sharing peer-to-peer network for storing and sharing data in a distributed file system. IPFS uses content-addressing to uniquely identify each file in a global namespac ...

InterPlanetary File System is p2p, worldwide distributed content-addressable, file-system.

Special-purpose file systems

aufs aufs (short for advanced multi-layered unification filesystem) implements a union mount for Linux file systems. The name originally stood for AnotherUnionFS until version 2. Developed by Junjiro Okajima in 2006, aufs is a complete rewrite of t ...

an enhanced version of

UnionFS Unionfs is a filesystem service for Linux, FreeBSD and NetBSD which implements a union mount for other file systems. It allows files and directories of separate file systems, known as branches, to be transparently overlaid, forming a single coher ...

stackable unification file system * AXFS (small footprint compressed read-only, with

XIP In computer science, execute in place (XIP) is a method of executing programs directly from long-term storage rather than copying it into RAM. It is an extension of using shared memory to reduce the total amount of memory required. Its general ef ...

) *

Barracuda A barracuda, or cuda for short, is a large, predatory, ray-finned fish known for its fearsome appearance and ferocious behaviour. The barracuda is a saltwater fish of the genus ''Sphyraena'', the only genus in the family Sphyraenidae, which was ...

WebDAV plug-in. Secure Network File Server for embedded devices. *

Boot File System The Boot File System (named BFS on Linux, but BFS also refers to the Be File System) was used on UnixWare to store files necessary to its boot process. It does not support directories, and only allows contiguous allocation for files, to make it ...

is used on UnixWare to store files necessary for its boot process. * cdfs (reading and writing of CDs) *

Compact Disc File System The Compact Disc File System (CDFS) is a file system for read-only and write-once CD-ROMs developed by Simson Garfinkel and J. Spencer Love at the MIT Media Lab between 1985 and 1986. The file system provided for the creation, modification, ren ...

(reading and writing of CDs; experimental) * cfs (caching) *

Cramfs The compressed ROM/RAM file system (or cramfs) is a free ( GPL'ed) read-only Linux file system designed for simplicity and space-efficiency. It is mainly used in embedded and small-footprint systems. Unlike a compressed image of a conventional ...

(small footprint compressed read-only) * Davfs2 (

WebDAV WebDAV (Web Distributed Authoring and Versioning) is a set of extensions to the Hypertext Transfer Protocol (HTTP), which allows user agents to collaboratively author contents ''directly'' in an HTTP web server by providing facilities for concu ...

) *

Freenet Freenet is a peer-to-peer platform for censorship-resistant, anonymous communication. It uses a decentralized distributed data store to keep and deliver information, and has a suite of free software for publishing and communicating on the Web ...

– Decentralized, censorship-resistant *

FTPFS FTPFS refers to file systems that support access to a File Transfer Protocol (FTP) server through standard file system application programming interfaces (APIs). The ftpfs command in Plan 9 was originated by Dennis Ritchie and was included in t ...

(FTP access) * GmailFS (Google Mail File System) * GridFS – GridFS is a specification for storing and retrieving files that exceed the BSON-document size limit of 16 MB for

MongoDB MongoDB is a source-available cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with optional schemas. MongoDB is developed by MongoDB Inc. and licensed under the Serve ...

. *

lnfs The Liga Nacional de Fútbol Sala (LNFS) (National Futsal League) is the governing body that runs the major professional futsal leagues in Spain. It was founded in 1989 and serves under the authority of the Royal Spanish Football Federation. Co ...

(long names) * LTFS (Linear Tape File System for LTO and Enterprise tape) * MVFS – MultiVersion File System, proprietary, used by

Rational ClearCase Rational ClearCase is a family of computer software tools that supports software configuration management (SCM) of source code and other software development assets. It also supports design-data management of electronic design artifacts, thus ena ...

.
Nexfs
Combines Block, File, Object and Cloud storage into a single pool of auto-tiering POSIX compatible storage. * romfs *

SquashFS Squashfs is a compressed read-only file system for Linux. Squashfs compresses files, inodes and directories, and supports block sizes from 4 KiB up to 1 MiB for greater compression. Several compression algorithms are supported. Squashfs is al ...

(compressed read-only) *

UMSDOS Linux has several filesystem drivers for the File Allocation Table (FAT) filesystem format. These are commonly known by the names used in the mount command to invoke particular drivers in the kernel: ', ', and '. History and support Most of the ...

UVFAT Linux has several filesystem drivers for the File Allocation Table (FAT) filesystem format. These are commonly known by the names used in the mount command to invoke particular drivers in the kernel: ', ', and '. History and support Most of the ...

– FAT file systems extended to store permissions and metadata (and in the case of UVFAT,

long file names), used for Linux *

– stackable unification file system, which can appear to merge the contents of several directories (branches), while keeping their physical content separate *

Venti Venti is a network storage system that permanently stores data blocks. A 160-bit SHA-1 hash of the data (called ''score'' by Venti) acts as the address of the data. This enforces a ''write-once'' policy since no other data block can be found wi ...

– Plan 9 de-duplicated storage used by

Pseudo file systems

devfs In Unix-like operating systems, a device file or special file is an interface to a device driver that appears in a file system as if it were an ordinary file. There are also special files in DOS, OS/2, and Windows. These special files allow ...

– a virtual file system in Unix-like operating systems for managing device nodes on-the-fly *

procfs The proc filesystem (procfs) is a special filesystem in Unix-like operating systems that presents information about processes and other system information in a hierarchical file-like structure, providing a more convenient and standardized meth ...

– a pseudo-file system, used to access kernel information about processes *

tmpfs tmpfs (short for Temporary File System) is a temporary file storage paradigm implemented in many Unix-like operating systems. It is intended to appear as a mounted file system, but data is stored in volatile memory instead of a persistent storage ...

– in-memory temporary file system (on Unix-like platforms) *

sysfs sysfs is a pseudo file system provided by the Linux kernel that exports information about various kernel subsystems, hardware devices, and associated device drivers from the kernel's device model to user space through virtual files. In addition ...

– a virtual file system in

holding information about buses, devices, firmware, filesystems, etc. *

debugfs debugfs is a special file system available in the Linux kernel since version 2.6.10-rc3.Linux: DebugFS
, by Jeremy, De ...

– a virtual file system in

for accessing and controlling kernel debugging * configfs – a writable file system used to configure various kernel components of

* sysctlfs – allow accessing

sysctl sysctl is a software utility of some Unix-like operating systems that reads and modifies the attributes of the system kernel such as its version number, maximum limits, and security settings. It is available both as a system call for compiled ...

nodes via a file system; available on

via PUFFS,

kernel via a 3rd-party module, and

as a part of Linux procfs. * kernfs – a file system found on some BSD systems (notably

) that provides access to some kernel state variables; similar to sysctlfs, Linux procfs and Linux sysfs. *

wikifs 9P (or the Plan 9 Filesystem Protocol or Styx) is a network protocol developed for the Plan 9 from Bell Labs distributed operating system as the means of connecting the components of a Plan 9 system. Files are key objects in Plan 9. They represe ...

– a server application for Plan 9's virtual,

wiki A wiki ( ) is an online hypertext publication collaboratively edited and managed by its own audience, using a web browser. A typical wiki contains multiple pages for the subjects or scope of the project, and could be either open to the pu ...

, file system

Encrypted file systems

eCryptfs __NOTOC__ eCryptfs (''Enterprise Cryptographic Filesystem'') is a package of disk encryption software for Linux. Its implementation is a POSIX-compliant filesystem-level encryption layer, aiming to offer functionality similar to that of GnuPG at ...

– a stacked cryptographic file system in the Linux kernel since 2.6.19 * Secure Shell File System (SSHFS) – locally mount a remote directory on a server using only a

secure shell The Secure Shell Protocol (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. Its most notable applications are remote login and command-line execution. SSH applications are based on a ...

EncFS EncFS is a Free (LGPL) FUSE-based cryptographic filesystem. It transparently encrypts files, using an arbitrary directory as storage for the encrypted files. Two directories are involved in mounting an EncFS filesystem: the source directory, an ...

, GPL Encrypted file system in user-space *

Rubberhose filesystem In computing, rubberhose (also known by its development codename Marutukku) is a deniable encryption archive containing multiple file systems whose existence can only be verified using the appropriate cryptographic key. Name and history The pr ...

* EFS – an encrypted file system for

systems and

. An extension of

, with encryption support.

File system interfaces

These are not really file systems; they allow access to file systems from an operating system standpoint. *

(file system in userspace, like

LUFS Loudness, K-weighted, relative to full scale (LKFS) is a standard loudness measurement unit used for audio normalization in broadcast television systems and other video and music streaming service A music streaming service is a type of streaming m ...

but better maintained) *

(Linux userland file system – seems to be abandoned in favour of

) * PUFFS (Userspace filesystem for NetBSD, including a compatibility layer called librefuse for porting existing FUSE-based applications) * VFS Virtual Filesystem

References

External links

File Systems
{{DEFAULTSORT:List Of File Systems *

File systems In computing, file system or filesystem (often abbreviated to fs) is a method and data structure that the operating system uses to control how data is stored and retrieved. Without a file system, data placed in a storage medium would be one larg ...

Disk file systems

File systems with built-in fault-tolerance

File systems optimized for flash memory, solid state media

Record-oriented file systems

Shared-disk file systems

Distributed file systems

Distributed fault-tolerant file systems

Distributed parallel file systems

Distributed parallel fault-tolerant file systems

Peer-to-peer file systems

Special-purpose file systems

Pseudo file systems

Encrypted file systems

File system interfaces

See also

References

External links