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| == Feature Flags == | | == Feature Flags == |
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| {| class="wikitable"
| | See the [[Feature_Flags|Feature Flags]] wiki page. |
| !Feature flag
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| !colspan=3|FreeBSD
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| !ZFS on Linux
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| !OpenZFS OSX
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| !OmniOS
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| |-
| |
| |
| |
| | 8.4
| |
| | 9.3
| |
| | 10.1
| |
| | 0.6.4
| |
| | 1.3.1
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| | r15104
| |
| |-
| |
| !async_destroy
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |-
| |
| !empty_bpobj
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |-
| |
| !lz4_compress
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |-
| |
| !multi_vdev_crash_dump
| |
| |no
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |no
| |
| |no
| |
| |style="background-color:lightgreen"|yes
| |
| |-
| |
| !spacemap_histogram
| |
| |no
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |-
| |
| !enabled_txg
| |
| |no
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |-
| |
| !hole_birth
| |
| |no
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |-
| |
| !extensible_dataset
| |
| |no
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |-
| |
| !embedded_data
| |
| |no
| |
| |no
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |-
| |
| !bookmarks
| |
| |no
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |-
| |
| !filesystem_limits
| |
| |no
| |
| |style="background-color:lightgreen"|yes
| |
| |style="background-color:lightgreen"|yes
| |
| |no
| |
| |no
| |
| |style="background-color:lightgreen"|yes
| |
| |-
| |
| !large_blocks
| |
| |no
| |
| |no
| |
| |no
| |
| |no
| |
| |no
| |
| |style="background-color:lightgreen"|yes
| |
| |}
| |
| | |
| '''Table legend'''
| |
| Other distributions:
| |
| * no = not implemented
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| * yes = implemented
| |
| | |
| For greatest compatibility, features that are exclusive (when enabled) should be periodically ported to all other distributions.
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| | |
| === Background ===
| |
| | |
| Originally the ZFS on-disk format was versioned with a single number that was increased whenever a new on-disk format change was introduced. This worked well when a single entity controlled the development of ZFS; however, in the more distributed development model of OpenZFS a single version number is not ideal. Every OpenZFS implementation would need to agree on every change to the on-disk format.
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| | |
| One of the first OpenZFS projects was a new versioning system called "feature flags" that tags on-disk format changes with unique names. The system supports both completely independent format changes, as well as format changes that depend on each other. A pool's on-disk format is portable between OpenZFS implementations as long as all of the feature flags in use by the pool are supported by both implementations.
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| For more details see these [http://blog.delphix.com/csiden/files/2012/01/ZFS_Feature_Flags.pdf slides (Jan 2012)] and [http://illumos.org/man/5/zpool-features <tt>zpool-features(5)</tt>] (illumos) or [http://www.freebsd.org/cgi/man.cgi?query=zpool-features&sektion=7&manpath=FreeBSD+11-current <tt>zpool-features(7)</tt>] (FreeBSD).
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| == libzfs_core == | | == libzfs_core == |