The following lists identify, characterise and link to fuller information on computer file systems.
Many older operating systems support only their one "native" file system, which does not bear any name apart from the name of the operating system itself. Examples of such include the CP/M file system and the Apple DOS file system. These unnamed file systems don't appear in the following list.
Disk file systems are usually stream-oriented. Files in a stream-oriented file system are sequences of randomly accessible bytes, accessible via read, write and seek operations.
- ADFS – Acorn's Advanced Disc filing system, successor to DFS.
- AFS – Acer Fast Filesystem, used on SCO OpenServer
- AthFS - AtheOS File System, a 64-bit journaled filesystem now used by Syllable. Also called AFS
- BFS – the Be File System used on BeOS, occasionally misnamed as BeFS
- DTFS – Desktop File System, featuring file compression, used by SCO OpenServer
- EAFS – Extended Acer Fast Filesystem, used on SCO OpenServer
- Extent File System (EFS) – an older block filing system under IRIX.
- ext – Extended file system, designed for Linux systems
- ext2 – Second extended file system, designed for Linux systems.
- ext3 – A journalled form of ext2.
- ext3cow – A versioning file system form of ext3.
- ext4 – A new version of ext3, with support for extents.
- FAT – Used on DOS and Microsoft Windows, 12-, 16- and 32-bit table depths. Compare VFAT.
- FFS (Amiga) – Fast File System, used on Amiga systems. This FS has evolved over time. Now counts FFS1, FFS Intl, FFS DCache, FFS2.
- FFS – Fast File System, used on *BSD systems
- Fossil – Plan 9 from Bell Labs snapshot archival file system.
- Files-11 – OpenVMS file system; also used on some PDP-11 systems; supports record-orientated files
- HFS – Hierarchical File System, used on older Mac OS systems
- HFS Plus – Updated version of HFS, used on newer Mac OS systems. Recent versions allow journaling.
- HPFS – High Performance File System, used on OS/2
- HTFS – High Throughput Filesystem, used on SCO OpenServer
- ISO 9660 – Used on CD-ROM and DVD-ROM discs (Rock Ridge and Joliet are extensions to this)
- JFS – IBM Journaling file system, provided in Linux, OS/2, and AIX
- LFS – 4.4BSD implementation of a log-structured file system
- MFS – Macintosh File System, used on early Mac OS systems
- Minix file system – Used on Minix systems
- NILFS – Linux implementation of a log-structured file system
- NTFS – Used on Windows NT, Windows 2000, Windows XP, Windows Server 2003 and Windows Vista systems
- NetWare File System - The original NetWare 2.x - 5.x file system, used optionnally by later versions.
- NSS – Novell Storage Services. This is a new 64-bit journaling file system using a balanced tree algorithm. Used in NetWare versions 5.0-up and recently ported to Linux.
- OFS – Old File System, on Amiga. Nice for floppies, but fairly useless on hard drives.
- PFS – and PFS2, PFS3, etc. Technically interesting file system available for the Amiga, performs very well under a lot of circumstances. Very simple and elegant.
- ReiserFS – File system that uses journaling
- Reiser4 – File system that uses journaling, newest version of ReiserFS
- S51K – AT&T UNIX System V 1KB Filesystem, used by SCO OpenServer
- SFS – Smart File System, journaling file system available for the Amiga platforms.
- UDF – Packet based file system for WORM/RW media such as CD-RW and DVD.
- UFS – Unix File System, used on older BSD systems
- UFS2 – Unix File System, used on newer BSD systems
- VxFS – Veritas file system, first commercial journaling file system; HP-UX, Solaris, Linux, AIX
- WAFL – Write Anywhere File Layout. High performance, log-structured like file system. WAFL heavily uses RAID 4, and NVRAM for transaction log replays. Used on Network Appliance systems
- XFS – Used on SGI IRIX and Linux systems
- ZFS – Used on Solaris 10 and OpenSolaris (not to be confused with zFS from IBM)
– 's Advanced Disc filing system, successor to .
In Record-oriented file systems files are stored as a collection of records. They are associated with older mainframe and minicomputer 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.
files are stored as a collection of . They are associated with older and 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.
Shared disk file systems (also called shared storage file systems, SAN file system or even cluster file systems) are primarily used in a storage area network where all nodes directly access the block storage 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 together with storage on hardware RAID. Shared disk file systems normally do not scale over 64 or 128 nodes.
or even ) are primarily used in a where all nodes directly access the 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 together with storage on hardware . Shared disk file systems normally do not scale over 64 or 128 nodes.
Shared disk file systems may be symmetric where metadata is distributed among the nodes or asymmetric with centralized metadata servers.
The current world record in file system performance (january 2006) is held by GPFS from IBM with 102 GByte/s sustained read/write to a single file on the ASC Purple at Lawrence Livermore National Laboratory, the current third fastest supercomputer.
- ADIC StorNext File System from ADIC. Asymmetric. Available for AIX, HP-UX, IRIX, Linux, Mac OS, Solaris and Windows. Interoperable with Xsan.
- CXFS (Clustered XFS) from Silicon Graphics (SGI). Available for AIX, IRIX, Linux, Solaris and Windows. Asymmetric.
- EMC Celerra HighRoad from EMC. Available for AIX, HP-UX, IRIX, Solaris and Windows. Asymmetric.
- Files-11 on VMSclusters, released by DEC in 1983, now from HP. Symmetric.
- Global File System (GFS) from Red Hat. Available for Linux under GPL. Symmetric (GDLM) or Asymmetric (GULM).
- General Parallel File System (GPFS) from IBM. Support replication between attached block storage. Available for AIX and Linux. Symmetric.
- HP Cluster File System (CFS) from HP. Available for HP-UX and Tru64 UNIX.
- IBM SanFS from IBM. Available for AIX, Linux and Windows. Asymmetric.
- Nasan File System from DataPlow. Available for Linux and Solaris. Asymmetric.
- Oracle Cluster File System (OCFS and now OCFS2) from Oracle Corporation. Available for Linux under GPL. Symmetric.
- Polyserve Matrix Server from PolyServe. Available for Windows and Linux. Symmetric.
- SAN File System from DataPlow. Available for IRIX, Linux, Solaris and Windows. Symmetric.
- QFS from Sun Microsystems. Available for Linux and Solaris. Asymmetric.
- Veritas Storage Foundation Cluster File System (CFS) from Symantec. Available for AIX, HP-UX, Linux and Solaris. Asymmetric.
- Xsan from Apple Computer. Available for Mac OS. Asymmetric. Interoperable with ADIC StorNext File System.
- VMFS2 from VMware/EMC. Available for VMWare ESX Server. Symmetric.
- VMFS3 from VMware/EMC. Available for VMWare ESX Server. Symmetric.
Distributed file systems are also called network file systems. Normally many implementations have been made, they are location dependent and they have access control lists (ACLs), unless otherwise stated below.
are also called . Normally many implementations have been made, they are location dependent and they have (ACLs), unless otherwise stated below.
Distributed fault tolerant replication of data between nodes (between servers or servers/clients) for high availability and offline (disconnected) operation.
replication of data between nodes (between servers or servers/clients) for and (disconnected) operation.
Distributed parallel file systems stripe data over multiple servers for high performance. They are normally used in high-performance computing (HPC).
file systems stripe data over multiple servers for high performance. They are normally used in .
Some of the parallel file systems may use object-based storage device (OSD) (In Lustre called OST) for chunks of data together with centralized metadata servers.
Distributed file systems, which also are parallel and fault tolerant, stripe and replicate data over multiple servers for high performance and to maintain data integrity. Even if a server fails no data is lost. The file systems are used in both high-performance computing (HPC) and high-availability clusters.
and , stripe and replicate data over multiple servers for high performance and to maintain . Even if a server fails no data is lost. The file systems are used in both and .
All file systems listed here focus on high availability, scalability and high performance unless otherwise stated below.
- acme (Plan 9) (text windows)
- archfs (archive)
- Barracuda WebDAV plugin. Secure Network File Server for embedded devices.
- cdfs (reading and writing of CDs)
- cfs (caching)
- compFUSEd (overlay transparent read-write compression, FUSE based )
- Cramfs (small footprint compressed read-only)
- Cromfs is a user-space (FUSE based) read-only filesystem using an efficient LZMA compression algorithm.
- Davfs2 (WebDAV)
- EFS – Encrypted file system for Microsoft Windows systems. An extension of NTFS
- EncFS, GPL Encrypted file system in user-space
- Freenet – Decentralized, censorship-resistant
- ftpfs (ftp access)
- fuse (file system in userspace, like LUFS but better maintained)
- FuseCompress (based on FUSE. provides transparent compression)
- GmailFS (Gmail File System)
- JFFS/JFFS2 (file systems designed specifically for flash devices)
- lnfs (long names)
- LUFS (Linux userland file system - seem to be abandoned in favour of FUSE)
- MVFS – MultiVersion File System, proprietary, used by Rational ClearCase.
- nntpfs (netnews)
- ParFiSys (Experimental parallel file system for massively parallel processing)
- plumber (Plan 9) (interprocess communication – pipes)
- procfs – pseudo-file system, used to access kernel information about processes
- Secure Shell File System (SSHFS) - locally mount a remote directory on a server using only a secure shell login.
- specfs (Special File System for device files )
- SquashFS (compressed read-only)
- sysfs (Linux)
- UMSDOS – FAT file system extended to store permissions and metadata, used for Linux.
- UnionFS – stackable unification file system, which can appear to merge the contents of several directories (branches), while keeping their physical content separate
- wikifs (Plan 9) (wiki wiki)
- YAFFS - Yet Another Flash File System