port async unlinked drain from illumos-nexenta

[mirror_zfs.git] / man / man5 / zfs-module-parameters.5

diff --git a/man/man5/zfs-module-parameters.5 b/man/man5/zfs-module-parameters.5
index 837a7d1c3d52aefcd4abe4611dc720a8492755b6..f6b04318307c7bd07262360a7748bc98ba9d6e0a 100644 (file)
--- a/man/man5/zfs-module-parameters.5
+++ b/man/man5/zfs-module-parameters.5
@@ -320,7 +320,7 @@ Use \fB1\fR for yes (default) and \fB0\fR for no.
 .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.
@@ -331,7 +331,7 @@ Default value: \fB200\fR.
 .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.
@@ -1149,6 +1149,21 @@ 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
@@ -1372,6 +1387,30 @@ further increasing latency.
 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
@@ -1385,6 +1424,30 @@ queue's min_active.  See the section "ZFS I/O SCHEDULER".
 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
@@ -1612,6 +1675,17 @@ dataset being written to had the property setting \fBlogbias=throughput\fR.
 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
@@ -1846,8 +1920,9 @@ Use \fB1\fR for yes and \fB0\fR for no (default).
 \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
@@ -1903,8 +1978,6 @@ A value of zero will disable this throttle.
 Default value: \fB30\fR and \fB0\fR to disable.
 .RE
 
-
-
 .sp
 .ne 2
 .na
@@ -1967,7 +2040,7 @@ combinations each time the block is accessed.  This allows all segment
 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
@@ -2527,6 +2600,19 @@ value of 100% will create a maximum of one thread per cpu.
 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