Lines Matching +full:no +full:- +full:high +full:- +full:z

1 .\" SPDX-License-Identifier: CDDL-1.0
9 .\" usr/src/OPENSOLARIS.LICENSE or https://opensource.org/licenses/CDDL-1.0.
27 .Nm zpool-features
31 ZFS pool on-disk format versions are specified via
33 which replace the old on-disk format numbers
34 .Pq the last supported on-disk format number is 28 .
38 .Sy feature Ns @ Ns Ar feature-name
48 Since most features can be enabled independently of each other, the on-disk
57 .Ar com.example : Ns Ar feature-name .
71 .Ar com.example : Ns Ar feature-name
73 .Ar feature-name
80 .Bl -tag -width "disabled"
82 This feature's on-disk format changes are in effect on the pool.
83 Support for this feature is required to import the pool in read-write mode.
84 If this feature is not read-only compatible,
85 support is also required to import the pool in read-only mode
86 .Pq see Sx Read-only compatibility .
89 feature's on-disk format changes have not been made yet.
91 but changes may be made to the on-disk format at any time
99 See feature-specific documentation for details.
101 This feature's on-disk format changes have not been made and will not be made
109 .Sy feature Ns @ Ns Ar short-name .
111 .Ss Read-only compatibility
112 Some features may make on-disk format changes that do not interfere with other
115 .Dq read-only compatible .
116 If all unsupported features on a pool are read-only compatible,
117 the pool can be imported in read-only mode by setting the
121 .Xr zpool-import 8
128 .Sy unsupported Ns @ Ns Ar feature-name
131 .Bl -tag -width "readonly"
135 state and therefore the pool's on-disk
138 The feature is read-only compatible and the pool has been imported in
139 read-only mode.
148 specific on-disk format, by enabling and disabling particular features.
160 When set to a comma-separated list of filenames
188 .Nm zpool Cm set Sy feature Ns @ Ns Ar feature-name Ns = Ns Sy enabled .
189 This setting also prevents pools from being upgraded to newer on-disk versions.
212 which might not be recognized by the currently-installed binaries.
220 .Bd -literal -compact -offset 4n
246 .No example# Nm cat Pa /usr/share/zfs/compatibility.d/grub2-2.06
253 # This file lists all read-only compatible features except
275 .Xr zpool-create 8
277 .Xr zpool-upgrade 8
282 .Bl -tag -compact -width "READ-ONLY COMPATIBLE"
294 .It READ-ONLY COMPATIBLE
301 .No This feature becomes Sy active No as soon as it is enabled \
321 .Po see Xr zfs-set 8 Pc .
337 .Bl -tag -width Ds
346 .Nm zpool Cm create No or Nm zpool Cm add No commands .
378 is non-zero.
380 .feature org.openzfs blake3 no extensible_dataset
383 BLAKE3 is a secure hash algorithm focused on high performance.
385 .checksum-spiel blake3
392 written) and takes no additional space.
408 mistakenly stored as arrays of 8 single-byte entries instead of single
409 8-byte entries, making pools non-endian-safe.
413 When active, new BRT entries are stored in the correct endian-safe format.
426 .feature com.datto bookmark_v2 no bookmark extensible_dataset
436 .feature com.delphix bookmark_written no bookmark extensible_dataset bookmark_v2
464 This two-phase approach will take longer than a healing resilver
476 .feature com.delphix device_removal no
479 command to remove top-level vdevs,
487 on a top-level vdev, and will never return to being
490 .feature org.openzfs draid no
494 dRAID is a variant of RAID-Z which provides integrated distributed
495 hot spares that allow faster resilvering while retaining the benefits of RAID-Z.
507 .feature com.klarasystems dynamic_gang_header no
517 .Xr zpool-upgrade 8 .
520 .feature org.illumos edonr no extensible_dataset
521 This feature enables the use of the Edon-R hash algorithm for checksum,
526 In an abundance of caution, Edon-R requires verification when used with
529 .Po see Xr zfs-set 8 Pc .
531 Edon-R is a very high-performance hash algorithm that was part
532 of the NIST SHA-3 competition.
533 It provides extremely high hash performance
534 .Pq over 350% faster than SHA-256 ,
538 in ZFS, which means that the checksum is pre-seeded with a secret
539 256-bit random key
545 .checksum-spiel edonr
547 .feature com.delphix embedded_data no
549 highly-compressible blocks.
553 When this feature is enabled, the contents of highly-compressible blocks are
562 is saved, and no additional I/O is needed to read and write the data block.
564 \*[instant-never]
576 This feature allows us to create each bpobj on-demand,
587 This has no user-visible impact, but other features may depend on this feature.
594 .feature com.datto encryption no bookmark_v2 extensible_dataset
617 .feature com.delphix extensible_dataset no
638 .feature com.delphix head_errlog no
639 This feature enables the upgraded version of errlog, which required an on-disk
650 \*[instant-never]
652 .feature com.delphix hole_birth no enabled_txg
655 .Pq or Fl R , No since it uses Fl i
672 The most common case of hole-filled objects is zvols.
675 .Sy A No to snapshot Sy B
677 .Sy A No and Sy B .
685 .Sy A No cannot be distinguished from holes created before Sy A ,
703 \*[instant-never]
705 .feature org.open-zfs large_blocks no extensible_dataset
716 .feature org.zfsonlinux large_dnode no extensible_dataset
761 This feature improves performance for heavily-fragmented pools,
762 especially when workloads are heavy in random-writes.
766 \*[instant-never]
768 .feature org.zfsonlinux longname no extensible_dataset
785 .feature org.illumos lz4_compress no
787 is a high-performance real-time compression algorithm that
807 .Xr zfs-set 8
813 \*[instant-never]
815 .feature com.joyent multi_vdev_crash_dump no
847 – no longer needed.
853 command is used on a top-level vdev, and will never return to being
878 The project ID is an object-based attribute.
883 .Pq via Nm chattr Sy [+-]P No or Nm zfs Cm project Fl s Ns | Ns Fl C .
896 \*[remount-upgrade]
898 .feature org.openzfs raidz_expansion no none
901 subcommand to attach a new device to a RAID-Z group, expanding the total
904 .Xr zpool-attach 8 .
906 .feature com.delphix redaction_bookmarks no bookmarks extensible_dataset
912 .Xr zfs-send 8 .
914 .feature com.delphix redacted_datasets no extensible_dataset
921 .Xr zfs-send 8 .
923 .feature com.delphix redaction_list_spill no redaction_bookmarks
931 when no long redaction lists remain in the pool.
933 .Xr zfs-send 8 .
947 .feature org.illumos sha512 no extensible_dataset
948 This feature enables the use of the SHA-512/256 truncated hash algorithm
949 .Pq FIPS 180-4
951 The native 64-bit arithmetic of SHA-512 provides an approximate 50%
952 performance boost over SHA-256 on 64-bit hardware
953 and is thus a good minimum-change replacement candidate
956 .Sy skein No and Sy edonr
959 .checksum-spiel sha512
961 .feature org.illumos skein no extensible_dataset
963 Skein is a high-performance secure hash algorithm that was a
964 finalist in the NIST SHA-3 competition.
965 It provides a very high security margin and high performance on 64-bit hardware
966 .Pq 80% faster than SHA-256 .
968 functionality in ZFS, which means that the checksum is pre-seeded with a
969 secret 256-bit random key
975 .checksum-spiel skein
993 space more efficiently on-disk while also increasing their maximum
1007 \*[instant-never]
1008 \*[remount-upgrade]
1010 .feature com.klarasystems vdev_zaps_v2 no
1025 .Sy root-0 .
1031 .Pq both Sy xattrdir Ns = Ns Sy dir No and Sy xattr Ns = Ns Sy sa
1059 .feature org.freebsd zstd_compress no extensible_dataset
1061 is a high-performance compression algorithm that features a
1062 combination of high compression ratios and high speed.
1084 .Po see Xr zfs-set 8 Pc .