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Zfs

ZFS
Developer(s) Oracle Corporation
Full name ZFS
Introduced November 2005 with OpenSolaris
Structures
Directory contents Extensible hash table
Limits
Max. volume size 256 quadrillion zebibytes (2128 bytes)
Max. file size 16 exbibytes (264 bytes)
Max. number of files
  • Per directory: 248
  • Per file system: unlimited
Max. filename length 255 ASCII characters (fewer for multibyte character encodings such as Unicode)
Features
Forks Yes (called "extended attributes", but they are full-fledged streams)
Attributes POSIX
File system permissions POSIX, NFSv4 ACLs
Transparent compression Yes
Transparent encryption Yes
Data deduplication Yes
Copy-on-write Yes
Other
Supported operating systems Solaris, OpenSolaris, illumos distributions, OpenIndiana, FreeBSD, Mac OS X Server 10.5 (only read-only support), NetBSD, Linux via third-party kernel module or ZFS-FUSE, OSv)

ZFS is a combined file system and logical volume manager designed by Sun Microsystems. The features of ZFS include protection against data corruption, support for high storage capacities, efficient data compression, integration of the concepts of filesystem and volume management, snapshots and copy-on-write clones, continuous integrity checking and automatic repair, RAID-Z and native NFSv4 ACLs.

The ZFS name is registered as a trademark of Oracle Corporation. The ZFS name originally stood for "Zettabyte File System". Originally, ZFS was proprietary, closed-source software developed internally by Sun as part of Solaris, with a team led by the CTO of Sun's storage business unit and Sun Fellow, Jeff Bonwick. In 2005, the bulk of Solaris, including ZFS, was licensed as open-source software under the Common Development and Distribution License (CDDL), as the OpenSolaris project. ZFS became a standard feature of Solaris 10 in June 2006.

In 2010, Oracle stopped the releasing of source code for new OpenSolaris and ZFS development, effectively forking their closed-source development from the open-source branch. In response, OpenZFS was created as a new open-source development umbrella project, aiming at bringing together individuals and companies that use the ZFS filesystem in an open-source manner.


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Wikipedia

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