'\" te
.\" Copyright (c) 2013 by Turbo Fredriksson <turbo@bayour.com>. All rights reserved.
-.\" Copyright (c) 2017 Datto Inc.
.\" Copyright (c) 2018 by Delphix. All rights reserved.
+.\" Copyright (c) 2019 Datto Inc.
.\" The contents of this file are subject to the terms of the Common Development
.\" and Distribution License (the "License"). You may not use this file except
.\" in compliance with the License. You can obtain a copy of the license at
.\" CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your
.\" own identifying information:
.\" Portions Copyright [yyyy] [name of copyright owner]
-.TH ZFS-MODULE-PARAMETERS 5 "Oct 28, 2017"
+.TH ZFS-MODULE-PARAMETERS 5 "Feb 8, 2019"
.SH NAME
zfs\-module\-parameters \- ZFS module parameters
.SH DESCRIPTION
.sp
.ne 2
.na
-\fBvdev_max_ms_count\fR (int)
+\fBzfs_vdev_default_ms_count\fR (int)
.ad
.RS 12n
When a vdev is added target this number of metaslabs per top-level vdev.
.sp
.ne 2
.na
-\fBvdev_min_ms_count\fR (int)
+\fBzfs_vdev_min_ms_count\fR (int)
.ad
.RS 12n
Minimum number of metaslabs to create in a top-level vdev.
.sp
.ne 2
.na
-\fBzfs_low_ios_per_second\fR (int)
+\fBzfs_slow_io_events_per_second\fR (int)
.ad
.RS 12n
Rate limit delay zevents (which report slow I/Os) to this many per second.
Default value: 20
.RE
+.sp
+.ne 2
+.na
+\fBzfs_unlink_suspend_progress\fR (uint)
+.ad
+.RS 12n
+When enabled, files will not be asynchronously removed from the list of pending
+unlinks and the space they consume will be leaked. Once this option has been
+disabled and the dataset is remounted, the pending unlinks will be processed
+and the freed space returned to the pool.
+This option is used by the test suite to facilitate testing.
+.sp
+Uses \fB0\fR (default) to allow progress and \fB1\fR to pause progress.
+.RE
+
.sp
.ne 2
.na
Default value: \fB2\fR.
.RE
+.sp
+.ne 2
+.na
+\fBzfs_vdev_initializing_max_active\fR (int)
+.ad
+.RS 12n
+Maximum initializing I/Os active to each device.
+See the section "ZFS I/O SCHEDULER".
+.sp
+Default value: \fB1\fR.
+.RE
+
+.sp
+.ne 2
+.na
+\fBzfs_vdev_initializing_min_active\fR (int)
+.ad
+.RS 12n
+Minimum initializing I/Os active to each device.
+See the section "ZFS I/O SCHEDULER".
+.sp
+Default value: \fB1\fR.
+.RE
+
.sp
.ne 2
.na
Default value: \fB1,000\fR.
.RE
+.sp
+.ne 2
+.na
+\fBzfs_vdev_removal_max_active\fR (int)
+.ad
+.RS 12n
+Maximum removal I/Os active to each device.
+See the section "ZFS I/O SCHEDULER".
+.sp
+Default value: \fB2\fR.
+.RE
+
+.sp
+.ne 2
+.na
+\fBzfs_vdev_removal_min_active\fR (int)
+.ad
+.RS 12n
+Minimum removal I/Os active to each device.
+See the section "ZFS I/O SCHEDULER".
+.sp
+Default value: \fB1\fR.
+.RE
+
.sp
.ne 2
.na
Default value: \fB32,768\fR.
.RE
+.sp
+.ne 2
+.na
+\fBzfs_initialize_value\fR (ulong)
+.ad
+.RS 12n
+Pattern written to vdev free space by \fBzpool initialize\fR.
+.sp
+Default value: \fB16,045,690,984,833,335,022\fR (0xdeadbeefdeadbeee).
+.RE
+
.sp
.ne 2
.na
\fBzfs_nocacheflush\fR (int)
.ad
.RS 12n
-Disable cache flush operations on disks when writing. Beware, this may cause
-corruption if disks re-order writes.
+Disable cache flush operations on disks when writing. Setting this will
+cause pool corruption on power loss if a volatile out-of-order write cache
+is enabled.
.sp
Use \fB1\fR for yes and \fB0\fR for no (default).
.RE
\fBzfs_per_txg_dirty_frees_percent \fR (ulong)
.ad
.RS 12n
-Tunable to control percentage of dirtied blocks from frees in one TXG.
-After this threshold is crossed, additional dirty blocks from frees
-wait until the next TXG.
+Tunable to control percentage of dirtied indirect blocks from frees allowed
+into one TXG. After this threshold is crossed, additional frees will wait until
+the next TXG.
A value of zero will disable this throttle.
.sp
-Default value: \fB30\fR and \fB0\fR to disable.
+Default value: \fB5\fR, set to \fB0\fR to disable.
.RE
-
-
.sp
.ne 2
.na
copies to participate fairly in the reconstruction when all combinations
cannot be checked and prevents repeated use of one bad copy.
.sp
-Default value: \fB256\fR.
+Default value: \fB4096\fR.
.RE
.sp
Use \fB1\fR for yes and \fB0\fR for no (default).
.RE
+.sp
+.ne 2
+.na
+\fBzfs_removal_ignore_errors\fR (int)
+.ad
+.RS 12n
+.sp
+Ignore hard IO errors during device removal. When set, if a device encounters
+a hard IO error during the removal process the removal will not be cancelled.
+This can result in a normally recoverable block becoming permanently damaged
+and is not recommended. This should only be used as a last resort when the
+pool cannot be returned to a healthy state prior to removing the device.
+.sp
+Default value: \fB0\fR.
+.RE
+
.sp
.ne 2
.na
Default value: \fB100\fR%.
.RE
+.sp
+.ne 2
+.na
+\fBzil_nocacheflush\fR (int)
+.ad
+.RS 12n
+Disable the cache flush commands that are normally sent to the disk(s) by
+the ZIL after an LWB write has completed. Setting this will cause ZIL
+corruption on power loss if a volatile out-of-order write cache is enabled.
+.sp
+Use \fB1\fR for yes and \fB0\fR for no (default).
+.RE
+
.sp
.ne 2
.na
projects / mirror_zfs.git / blobdiff