ZFS is a file system originally developed by Sun Microsystems.
ZFS may also refer to:
- ZFS+, ZFS with proprietary data de-duplication technology extensions by GreenBytes
- zFS (z/OS file system), by IBM
- zFS (IBM file system project), an experimental decentralized file system
- Zero field splitting, a spectroscopic concept
- Zurich Financial Services
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.
z/OS Distributed File Service zSeries File System is a POSIX-style hierarchical file system for IBM's z/OS zSeries operating system, a successor to that operating system's HFS.
zFS technology was first released in 1995 as the Local File System, a lower layer of the DCE Distributed File System. It was available on MVS/ESA V5R2.2 and all OS/390 releases. DFS/LFS was provided as a part of the DCE feature, not of the base operating system.
zFS was initially released for z/OS as separate PTFs (patches) for z/OS 1.2, with backports available for z/OS 1.1 and OS/390 2.10. Beginning with z/OS 1.3, zFS is included as a standard feature and is being actively developed.
zFS was an IBM research project to develop a distributed, decentralized file system. It was a follow-on to the IBM DSF (Data Sharing Facility) project to build a serverless file system.