Oracle ZFS
| Developer(s) | Sun Microsystems originally, Oracle Corporation since 2010. |
|---|---|
| Full name | ZFS |
| Introduced | November 2005 with OpenSolaris |
| Structures | |
| Directory contents | Extensible hash table |
| Limits | |
| Max. volume size | 256 trillion yobibytes (2128 bytes)[1] |
| Max. file size | 16 exbibytes (264 bytes) |
| Max. number of files |
|
| Max. filename length | 255 ASCII characters (fewer for multibyte character standards 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 (limited to read-only), NetBSD, Linux via third-party kernel module ("ZFS on Linux")[2] or ZFS-FUSE, OSv |
Oracle ZFS is a proprietary file system and logical volume manager. ZFS is scalable, and includes extensive 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, native NFSv4 ACLs, and can be very precisely configured.
ZFS is a registered trademark belonging to Oracle.[3]
History
Implementations
Solaris 10
In update 2 and later, ZFS is part of Sun's own Solaris 10 operating system and is thus available on both SPARC and x86-based systems.
Solaris 11
After Oracle's Solaris 11 Express release, the OS/Net consolidation (the main OS code) was made proprietary and closed-source,[4] and further ZFS upgrades and implementations inside Solaris (such as encryption) are not compatible with other non-proprietary implementations which use previous versions of ZFS.
When creating a new ZFS pool, to retain the ability to use access the pool from other non-proprietary Solaris-based distributions, it is recommended to upgrade to Solaris 11 Express from OpenSolaris (snv_134b), and thereby stay at ZFS version 28.
Future development
On September 2, 2017, Simon Phipps reported that Oracle had laid off virtually all of its Solaris core development staff, interpreting it as a sign that Oracle no longer intends to support future development of the platform.[5]
Version history
| Old release |
| Latest Proprietary stable release |
| ZFS Filesystem Version Number | OS Release | Significant changes |
|---|---|---|
| 6 | Solaris 11.1 | Multilevel file system support[6] |
| 7 | Solaris 11.4 SRU 45 | File retention support[6] |
| 8 | Solaris 11.4 SRU 51 | Unicode versioning support[6] |
| ZFS Pool Version Number | OS Release | Significant changes |
|---|---|---|
| 29 | Solaris Nevada b148 | RAID-Z/mirror hybrid allocator |
| 30 | Solaris Nevada b149 | ZFS encryption |
| 31 | Solaris Nevada b150 | Improved 'zfs list' performance |
| 32 | Solaris Nevada b151 | One MB block support |
| 33 | Solaris Nevada b163 | Improved share support |
| 34 | Solaris 11.1 (0.5.11-0.175.1.0.0.24.2) | Sharing with inheritance |
| 35 | Solaris 11.2 (0.5.11-0.175.2.0.0.42.0) | Sequential resilver |
| 36 | Solaris 11.3 | Efficient log block allocation |
| 37 | Solaris 11.3 | LZ4 compression |
| 38 | Solaris 11.4 | xcopy with encryption |
| 39 | Solaris 11.4 | reduce resilver restart |
| 40 | Solaris 11.4 | Deduplication 2 |
| 41 | Solaris 11.4 | Asynchronous dataset destroy |
| 42 | Solaris 11.4 | Reguid: ability to change the pool guid |
| 43 | Solaris 11.4, Oracle ZFS Storage Simulator 8.7[7] | RAID-Z improvements and cloud device support.[8] |
| 44 | Solaris 11.4[8] | Device removal |
| 45 | Solaris 11.4 SRU 11[9] | Lazy deadlists |
| 46 | Solaris 11.4 SRU 12[10] | Compact file metadata for encryption |
| 47 | Solaris 11.4 SRU 21[11] | Property Support for ZVOLs |
| 48 | Solaris 11.4 SRU 45 | File retention support[12] |
| 49 | Solaris 11.4 SRU 51 | Unicode versioning support[12] |
References
- ↑ 1.0 1.1 "What Is ZFS?". Oracle. http://docs.oracle.com/cd/E23823_01/html/819-5461/zfsover-2.html#gayou.
- ↑ "ZFS on Linux Licensing". https://github.com/openzfs/zfs/wiki/FAQ#licensing.
- ↑ "Status Information for Serial Number 85901629 (ZFS)". United States Patent and Trademark Office. https://tsdrapi.uspto.gov/ts/cd/casestatus/sn85901629/content.
- ↑ "Oracle Has Killed OpenSolaris". Techie Buzz. August 14, 2010. http://techie-buzz.com/foss/oracle-has-killed-opensolaris.html.
- ↑ Varghese, Sam (2017-09-04). "Bye, bye Solaris, it was a nice ride while it lasted". https://www.itwire.com/open-sauce/79738-bye,-bye-solaris,-it-was-a-nice-ride-while-it-lasted.html.
- ↑ 6.0 6.1 6.2 "ZFS File System Versions". Oracle Corporation. 2022. https://docs.oracle.com/en/operating-systems/solaris/oracle-solaris/11.4/manage-zfs/zfs-file-system-versions.html.
- ↑ "Oracle ZFS Storage Simulator download". Oracle Corporation. 2017. http://www.oracle.com/technetwork/server-storage/sun-unified-storage/downloads/sun-simulator-1368816.html.
- ↑ 8.0 8.1 "ZFS Pool Versions". Oracle Corporation. 2018. https://docs.oracle.com/cd/E37838_01/html/E61017/gjxle.html.
- ↑ "ZFS Pool Versions". Oracle Corporation. 2019. https://docs.oracle.com/cd/E37838_01/html/E61017/gjxle.html.
- ↑ "ZFS Pool Versions". Oracle Corporation. 2019. https://docs.oracle.com/cd/E37838_01/html/E61017/gjxle.html.
- ↑ "ZFS Pool Versions". Oracle Corporation. 2020. https://docs.oracle.com/cd/E37838_01/html/E61017/gjxle.html.
- ↑ 12.0 12.1 "ZFS Pool Versions". Oracle Corporation. 2022. https://docs.oracle.com/en/operating-systems/solaris/oracle-solaris/11.4/manage-zfs/zfs-pool-versions.html.
External links
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