Lines Matching +full:high +full:- +full:performance

8 .\" usr/src/OPENSOLARIS.LICENSE or https://opensource.org/licenses/CDDL-1.0.
26 .Nm zpool-features
30 ZFS pool on-disk format versions are specified via
32 which replace the old on-disk format numbers
33 .Pq the last supported on-disk format number is 28 .
37 .Sy feature Ns @ Ns Ar feature-name
47 Since most features can be enabled independently of each other, the on-disk
56 .Ar com.example : Ns Ar feature-name .
70 .Ar com.example : Ns Ar feature-name
72 .Ar feature-name
79 .Bl -tag -width "disabled"
81 This feature's on-disk format changes are in effect on the pool.
82 Support for this feature is required to import the pool in read-write mode.
83 If this feature is not read-only compatible,
84 support is also required to import the pool in read-only mode
85 .Pq see Sx Read-only compatibility .
88 feature's on-disk format changes have not been made yet.
90 but changes may be made to the on-disk format at any time
98 See feature-specific documentation for details.
100 This feature's on-disk format changes have not been made and will not be made
108 .Sy feature Ns @ Ns Ar short-name .
110 .Ss Read-only compatibility
111 Some features may make on-disk format changes that do not interfere with other
114 .Dq read-only compatible .
115 If all unsupported features on a pool are read-only compatible,
116 the pool can be imported in read-only mode by setting the
120 .Xr zpool-import 8
127 .Sy unsupported Ns @ Ns Ar feature-name
130 .Bl -tag -width "readonly"
134 state and therefore the pool's on-disk
137 The feature is read-only compatible and the pool has been imported in
138 read-only mode.
147 specific on-disk format, by enabling and disabling particular features.
159 When set to a comma-separated list of filenames
187 .Nm zpool Cm set Sy feature Ns @ Ns Ar feature-name Ns = Ns Sy enabled .
188 This setting also prevents pools from being upgraded to newer on-disk versions.
211 which might not be recognized by the currently-installed binaries.
219 .Bd -literal -compact -offset 4n
245 .No example# Nm cat Pa /usr/share/zfs/compatibility.d/grub2-2.06
252 # This file lists all read-only comaptible features except
274 .Xr zpool-create 8
276 .Xr zpool-upgrade 8
281 .Bl -tag -compact -width "READ-ONLY COMPATIBLE"
293 .It READ-ONLY COMPATIBLE
320 .Po see Xr zfs-set 8 Pc .
336 .Bl -tag -width Ds
377 is non-zero.
382 BLAKE3 is a secure hash algorithm focused on high performance.
384 .checksum-spiel blake3
452 This two-phase approach will take longer than a healing resilver
467 command to remove top-level vdevs,
475 on a top-level vdev, and will never return to being
482 dRAID is a variant of RAID-Z which provides integrated distributed
483 hot spares that allow faster resilvering while retaining the benefits of RAID-Z.
496 This feature enables the use of the Edon-R hash algorithm for checksum,
501 In an abundance of caution, Edon-R requires verification when used with
504 .Po see Xr zfs-set 8 Pc .
506 Edon-R is a very high-performance hash algorithm that was part
507 of the NIST SHA-3 competition.
508 It provides extremely high hash performance
509 .Pq over 350% faster than SHA-256 ,
513 in ZFS, which means that the checksum is pre-seeded with a secret
514 256-bit random key
520 .checksum-spiel edonr
523 This feature improves the performance and compression ratio of
524 highly-compressible blocks.
528 When this feature is enabled, the contents of highly-compressible blocks are
539 \*[instant-never]
542 This feature increases the performance of creating and using a large
551 This feature allows us to create each bpobj on-demand,
562 This has no user-visible impact, but other features may depend on this feature.
614 This feature enables the upgraded version of errlog, which required an on-disk
625 \*[instant-never]
644 This feature improves performance of incremental sends
647 The most common case of hole-filled objects is zvols.
678 \*[instant-never]
680 .feature org.open-zfs large_blocks no extensible_dataset
706 thus potentially improving performance by avoiding the use of spill blocks.
736 This feature improves performance for heavily-fragmented pools,
737 especially when workloads are heavy in random-writes.
741 \*[instant-never]
762 is a high-performance real-time compression algorithm that
782 .Xr zfs-set 8
788 \*[instant-never]
828 command is used on a top-level vdev, and will never return to being
836 The project ID is an object-based attribute.
841 .Pq via Nm chattr Sy [+-]P No or Nm zfs Cm project Fl s Ns | Ns Fl C .
854 \*[remount-upgrade]
859 subcommand to attach a new device to a RAID-Z group, expanding the total
862 .Xr zpool-attach 8 .
870 .Xr zfs-send 8 .
879 .Xr zfs-send 8 .
891 .Xr zfs-send 8 .
906 This feature enables the use of the SHA-512/256 truncated hash algorithm
907 .Pq FIPS 180-4
909 The native 64-bit arithmetic of SHA-512 provides an approximate 50%
910 performance boost over SHA-256 on 64-bit hardware
911 and is thus a good minimum-change replacement candidate
912 for systems where hash performance is important,
917 .checksum-spiel sha512
921 Skein is a high-performance secure hash algorithm that was a
922 finalist in the NIST SHA-3 competition.
923 It provides a very high security margin and high performance on 64-bit hardware
924 .Pq 80% faster than SHA-256 .
926 functionality in ZFS, which means that the checksum is pre-seeded with a
927 secret 256-bit random key
933 .checksum-spiel skein
951 space more efficiently on-disk while also increasing their maximum
965 \*[instant-never]
966 \*[remount-upgrade]
983 .Sy root-0 .
1019 is a high-performance compression algorithm that features a
1020 combination of high compression ratios and high speed.
1042 .Po see Xr zfs-set 8 Pc .