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

25 .Nm zpool-features
29 ZFS pool on-disk format versions are specified via
31 which replace the old on-disk format numbers
32 .Pq the last supported on-disk format number is 28 .
36 .Sy feature Ns @ Ns Ar feature-name
43 Since most features can be enabled independently of each other, the on-disk
52 .Ar com.example : Ns Ar feature-name .
65 .Ar com.example : Ns Ar feature-name
67 .Ar feature-name
74 .Bl -tag -width "disabled"
76 This feature's on-disk format changes are in effect on the pool.
77 Support for this feature is required to import the pool in read-write mode.
78 If this feature is not read-only compatible,
79 support is also required to import the pool in read-only mode
80 .Pq see Sx Read-only compatibility .
83 feature's on-disk format changes have not been made yet.
85 but changes may be made to the on-disk format at any time
93 See feature-specific documentation for details.
95 This feature's on-disk format changes have not been made and will not be made
103 .Sy feature Ns @ Ns Ar short-name .
105 .Ss Read-only compatibility
106 Some features may make on-disk format changes that do not interfere with other
109 .Dq read-only compatible .
110 If all unsupported features on a pool are read-only compatible,
111 the pool can be imported in read-only mode by setting the
122 .Sy unsupported Ns @ Ns Ar feature-name
125 .Bl -tag -width "readonly"
129 state and therefore the pool's on-disk
132 The feature is read-only compatible and the pool has been imported in
133 read-only mode.
142 .Bl -tag -compact -width "READ-ONLY COMPATIBLE"
154 .It READ-ONLY COMPATIBLE
197 .Bl -tag -width Ds
238 is non-zero.
264 command to remove top-level vdevs,
272 on a top-level vdev, and will never return to being
276 This feature enables the use of the Edon-R hash algorithm for checksum,
281 In an abundance of caution, Edon-R requires verification when used with
286 Edon-R is a very high-performance hash algorithm that was part
287 of the NIST SHA-3 competition.
288 It provides extremely high hash performance
289 .Pq over 350% faster than SHA-256 ,
293 in ZFS, which means that the checksum is pre-seeded with a secret
294 256-bit random key
300 .checksum-spiel edonr
303 This feature improves the performance and compression ratio of
304 highly-compressible blocks.
308 When this feature is enabled, the contents of highly-compressible blocks are
319 \*[instant-never]
322 This feature increases the performance of creating and using a large
331 This feature allows us to create each bpobj on-demand,
342 This has no user-visible impact, but other features may depend on this feature.
396 This feature improves performance of incremental sends
399 The most common case of hole-filled objects is zvols.
430 \*[instant-never]
432 .feature org.open-zfs large_blocks no extensible_dataset
458 thus potentially improving performance by avoiding the use of spill blocks.
461 This feature improves performance for heavily-fragmented pools,
462 especially when workloads are heavy in random-writes.
466 \*[instant-never]
470 is a high-performance real-time compression algorithm that
496 \*[instant-never]
536 command is used on a top-level vdev, and will never return to being
544 The project ID is an object-based attribute.
549 .Pq via Nm chattr Sy [+-]P No or Nm zfs Cm project Fl s Ns | Ns Fl C .
562 \*[remount-upgrade]
577 This feature enables the use of the SHA-512/256 truncated hash algorithm
578 .Pq FIPS 180-4
580 The native 64-bit arithmetic of SHA-512 provides an approximate 50%
581 performance boost over SHA-256 on 64-bit hardware
582 and is thus a good minimum-change replacement candidate
583 for systems where hash performance is important,
588 .checksum-spiel sha512
592 Skein is a high-performance secure hash algorithm that was a
593 finalist in the NIST SHA-3 competition.
594 It provides a very high security margin and high performance on 64-bit hardware
595 .Pq 80% faster than SHA-256 .
597 functionality in ZFS, which means that the checksum is pre-seeded with a
598 secret 256-bit random key
604 .checksum-spiel skein
622 space more efficiently on-disk while also increasing their maximum
636 \*[instant-never]
637 \*[remount-upgrade]