Lines Matching +full:active +full:- +full:distance
9 .\" usr/src/OPENSOLARIS.LICENSE or https://opensource.org/licenses/CDDL-1.0.
31 .Bl -tag -width Ds
102 Turbo L2ARC warm-up.
179 Percent of ARC size allowed for L2ARC-only headers.
252 before moving on to the next top-level vdev.
255 Enable metaslab group biasing based on their vdevs' over- or under-utilization
305 When attempting to log an output nvlist of an ioctl in the on-disk history,
310 .Fn zfs_ioc_channel_program Pq cf. Xr zfs-program 8 .
316 Enable/disable segment-based metaslab selection.
319 When using segment-based metaslab selection, continue allocating
320 from the active metaslab until this option's
333 Maximum distance to search forward from the last offset.
338 becomes the performance limiting factor on high-performance storage.
382 .Bl -item -compact
390 If that fails then we will have a multi-layer gang block.
393 .Bl -item -compact
403 If that fails then we will have a multi-layer gang block.
413 When a vdev is added, target this number of metaslabs per top-level vdev.
422 Maximum ashift used when optimizing for logical \[->] physical sector size on
424 top-level vdevs.
430 If non-zero, then a Direct I/O write's checksum will be verified every
450 Minimum ashift used when creating new top-level vdevs.
453 Minimum number of metaslabs to create in a top-level vdev.
461 Practical upper limit of total metaslabs per top-level vdev.
493 active.
495 Max amount of memory to use for RAID-Z expansion I/O.
499 For testing, pause RAID-Z expansion when reflow amount reaches this value.
502 For expanded RAID-Z, aggregate reads that have more rows than this.
506 active.
544 If this parameter is unset, the traversal skips non-metadata blocks.
546 import has started to stop or start the traversal of non-metadata blocks.
568 It also limits the worst-case time to allocate space.
588 Limits the number of on-disk error log entries that will be converted to the
595 During top-level vdev removal, chunks of data are copied from the vdev
606 Logical ashift for file-based devices.
609 Physical ashift for file-based devices.
630 Prefetch distance starts from the demand access size and quickly grows to
643 Requests within this byte distance from the current prefetch stream position
664 .It Sy zfs_abd_scatter_max_order Ns = Ns Sy MAX_ORDER\-1 Pq uint
673 This is the minimum allocation size that will use scatter (page-based) ABDs.
678 bytes, try to unpin some of it in response to demand for non-metadata.
692 Percentage of ARC dnodes to try to scan in response to demand for non-metadata
700 with 8-byte pointers.
723 Number ARC headers to evict per sub-list before proceeding to another sub-list.
724 This batch-style operation prevents entire sub-lists from being evicted at once
750 .Sy all_system_memory No \- Sy 1 GiB
792 Number of missing top-level vdevs which will be allowed during
793 pool import (only in read-only mode).
805 .Pa zfs-dbgmsg
810 equivalent to a quarter of the user-wired memory limit under
817 To allow more fine-grained locking, each ARC state contains a series
819 Locking is performed at the level of these "sub-lists".
820 This parameters controls the number of sub-lists per ARC state,
935 bytes on-disk.
940 Only attempt to condense indirect vdev mappings if the on-disk size
997 .Bl -tag -compact -offset 4n -width "continue"
1003 Attempt to recover from a "hung" operation by re-dispatching it
1007 This can be used to facilitate automatic fail-over
1008 to a properly configured fail-over partner.
1027 Enable prefetching dedup-ed blocks which are going to be freed.
1094 OpenZFS will spend no more than this much memory on maintaining the in-memory
1137 OpenZFS pre-release versions and now have compatibility issues.
1148 are not created per-object and instead a hashtable is used where collisions
1157 Upper-bound limit for unflushed metadata changes to be held by the
1175 This tunable is important because it involves a trade-off between import
1178 active which means that we flush metaslabs less often and thus decrease
1204 It effectively limits maximum number of unflushed per-TXG spacemap logs
1252 for 32-bit systems.
1284 The upper limit of write-transaction zil log data size in bytes.
1296 Since ZFS is a copy-on-write filesystem with snapshots, blocks cannot be
1329 results in the original CPU-based calculation being used.
1374 Maximum asynchronous read I/O operations active to each device.
1378 Minimum asynchronous read I/O operation active to each device.
1384 to limit active async writes.
1386 the active I/O limit is linearly interpolated.
1392 to limit active async writes.
1394 the active I/O limit is linearly
1399 Maximum asynchronous write I/O operations active to each device.
1403 Minimum asynchronous write I/O operations active to each device.
1417 Maximum initializing I/O operations active to each device.
1421 Minimum initializing I/O operations active to each device.
1425 The maximum number of I/O operations active to each device.
1438 Maximum sequential resilver I/O operations active to each device.
1442 Minimum sequential resilver I/O operations active to each device.
1446 Maximum removal I/O operations active to each device.
1450 Minimum removal I/O operations active to each device.
1454 Maximum scrub I/O operations active to each device.
1458 Minimum scrub I/O operations active to each device.
1462 Maximum synchronous read I/O operations active to each device.
1466 Minimum synchronous read I/O operations active to each device.
1470 Maximum synchronous write I/O operations active to each device.
1474 Minimum synchronous write I/O operations active to each device.
1478 Maximum trim/discard I/O operations active to each device.
1482 Minimum trim/discard I/O operations active to each device.
1486 For non-interactive I/O (scrub, resilver, removal, initialize and rebuild),
1487 the number of concurrently-active I/O operations is limited to
1490 When there are no interactive I/O operations active (synchronous or otherwise),
1495 and the number of concurrently-active non-interactive operations is increased to
1506 To prevent non-interactive I/O, like scrub,
1515 Maximum number of queued allocations per top-level vdev expressed as
1533 The following options may be bitwise-ored together:
1591 The following flags may be bitwise-ored together:
1604 256 ZFS_DEBUG_METASLAB_VERIFY Verify space accounting on disk matches in-memory \fBrange_trees\fP.
1637 from the error-encountering filesystem is "temporarily leaked".
1651 .Bl -enum -compact -offset 4n -width "1."
1654 e.g. due to a top-level vdev going offline), or
1691 .Xr zpool-initialize 8 .
1695 .Xr zpool-initialize 8 .
1699 The threshold size (in block pointers) at which we create a new sub-livelist.
1782 Allow metaslabs to keep their active state as long as their fragmentation
1784 An active metaslab that exceeds this threshold
1785 will no longer keep its active status allowing better metaslabs to be selected.
1811 Setting the threshold to a non-zero percentage will stop allocations
1838 .Sy zfs_multihost_interval No / Sy leaf-vdevs .
1851 the risk of failing to detect an active pool.
1898 if a volatile out-of-order write cache is enabled.
1901 Allow no-operation writes.
1918 The number of blocks pointed by indirect (non-L0) block which should be
1947 Disable QAT hardware acceleration for AES-GCM encryption.
1963 top-level vdev.
1966 Automatically start a pool scrub when the last active sequential resilver
2064 .Bl -tag -compact -offset 4n -width "a"
2071 The largest mostly-contiguous chunk of found data will be verified first.
2092 .It Sy zfs_scan_mem_lim_fact Ns = Ns Sy 20 Ns ^-1 Pq uint
2099 .It Sy zfs_scan_mem_lim_soft_fact Ns = Ns Sy 20 Ns ^-1 Pq uint
2134 Including unmodified copies of the spill blocks creates a backwards-compatible
2137 .It Sy zfs_send_no_prefetch_queue_ff Ns = Ns Sy 20 Ns ^\-1 Pq uint
2148 .It Sy zfs_send_queue_ff Ns = Ns Sy 20 Ns ^\-1 Pq uint
2159 .It Sy zfs_recv_queue_ff Ns = Ns Sy 20 Ns ^\-1 Pq uint
2181 When this variable is set to non-zero a corrective receive:
2182 .Bl -enum -compact -offset 4n -width "1."
2224 many blocks' size will change, and thus we have to re-allocate
2254 This option is useful for pools constructed from large thinly-provisioned
2270 This setting represents a trade-off between issuing larger,
2294 Max vdev I/O aggregation size for non-rotating media.
2311 The maximum distance for the last queued I/O operation in which
2317 the purpose of selecting the least busy mirror member on non-rotational vdevs
2330 Aggregate read I/O operations if the on-disk gap between them is within this
2334 Aggregate write I/O operations if the on-disk gap between them is within this
2340 Variants that don't depend on CPU-specific features
2353 fastest selected by built-in benchmark
2356 sse2 SSE2 instruction set 64-bit x86
2357 ssse3 SSSE3 instruction set 64-bit x86
2358 avx2 AVX2 instruction set 64-bit x86
2359 avx512f AVX512F instruction set 64-bit x86
2360 avx512bw AVX512F & AVX512BW instruction sets 64-bit x86
2361 aarch64_neon NEON Aarch64/64-bit ARMv8
2362 aarch64_neonx2 NEON with more unrolling Aarch64/64-bit ARMv8
2373 .Xr zpool-events 8 .
2390 The number of taskq entries that are pre-populated when the taskq is first
2415 if a volatile out-of-order write cache is enabled.
2424 to limit potential SLOG device abuse by single active ZIL writer.
2437 Usually, one metaslab from each normal-class vdev is dedicated for use by
2447 using LZ4 and zstd-1 passes is enabled.
2454 If non-zero, the zio deadman will produce debugging messages
2472 When enabled, the maximum number of pending allocations per top-level vdev
2524 generate a system-dependent value close to 6 threads per taskq.
2577 .Pq Li blk-mq .
2597 .Li blk-mq
2609 .Li blk-mq
2617 .Li blk-mq
2624 .Sy volblocksize Ns -sized blocks per zvol thread.
2632 .Li blk-mq
2637 .Li blk-mq
2640 .Li blk-mq
2654 .Bl -tag -compact -offset 4n -width "a"
2678 Note that the sum of the per-queue minima must not exceed the aggregate maximum.
2679 If the sum of the per-queue maxima exceeds the aggregate maximum,
2680 then the number of active operations may reach
2683 regardless of whether all per-queue minima have been met.
2726 the I/O scheduler changes the maximum number of active async write operations
2737 follows a piece-wise linear function defined by a few adjustable points:
2738 .Bd -literal
2739 | o---------| <-- \fBzfs_vdev_async_write_max_active\fP
2742 active | / | |
2746 |-------o | | <-- \fBzfs_vdev_async_write_min_active\fP
2750 | `-- \fBzfs_vdev_async_write_active_max_dirty_percent\fP
2751 `--------- \fBzfs_vdev_async_write_active_min_dirty_percent\fP
2787 .D1 min_time = min( Ns Sy zfs_delay_scale No \(mu Po Sy dirty No \- Sy min Pc / Po Sy max No \- Sy dirty Pc , 100ms)
2800 .Bd -literal
2802 10ms +-------------------------------------------------------------*+
2821 | \fBzfs_delay_scale\fP ----------> ******** |
2822 0 +-------------------------------------*********----------------+
2823 0% <- \fBzfs_dirty_data_max\fP -> 100%
2839 .Bd -literal
2841 100ms +-------------------------------------------------------------++
2850 + \fBzfs_delay_scale\fP ----------> ***** +
2861 +--------------------------------------------------------------+
2862 0% <- \fBzfs_dirty_data_max\fP -> 100%
2869 for the I/O scheduler to reach optimal throughput on the back-end storage,