diff options
Diffstat (limited to 'man/man5/zfs-module-parameters.5')
| -rw-r--r-- | man/man5/zfs-module-parameters.5 | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/man/man5/zfs-module-parameters.5 b/man/man5/zfs-module-parameters.5 index 886dffce8..dbfa8806a 100644 --- a/man/man5/zfs-module-parameters.5 +++ b/man/man5/zfs-module-parameters.5 @@ -428,6 +428,24 @@ Default value: \fB5\fR. .sp .ne 2 .na +\fBvdev_removal_max_span\fR (int) +.ad +.RS 12n +During top-level vdev removal, chunks of data are copied from the vdev +which may include free space in order to trade bandwidth for IOPS. +This parameter determines the maximum span of free space (in bytes) +which will be included as "unnecessary" data in a chunk of copied data. + +The default value here was chosen to align with +\fBzfs_vdev_read_gap_limit\fR, which is a similar concept when doing +regular reads (but there's no reason it has to be the same). +.sp +Default value: \fB32,768\fR. +.RE + +.sp +.ne 2 +.na \fBzfetch_array_rd_sz\fR (ulong) .ad .RS 12n @@ -871,6 +889,47 @@ Default value: \fB5\fR%. .sp .ne 2 .na +\fBzfs_condense_indirect_vdevs_enable\fR (int) +.ad +.RS 12n +Enable condensing indirect vdev mappings. When set to a non-zero value, +attempt to condense indirect vdev mappings if the mapping uses more than +\fBzfs_condense_min_mapping_bytes\fR bytes of memory and if the obsolete +space map object uses more than \fBzfs_condense_max_obsolete_bytes\fR +bytes on-disk. The condensing process is an attempt to save memory by +removing obsolete mappings. +.sp +Default value: \fB1\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_condense_max_obsolete_bytes\fR (ulong) +.ad +.RS 12n +Only attempt to condense indirect vdev mappings if the on-disk size +of the obsolete space map object is greater than this number of bytes +(see \fBfBzfs_condense_indirect_vdevs_enable\fR). +.sp +Default value: \fB1,073,741,824\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_condense_min_mapping_bytes\fR (ulong) +.ad +.RS 12n +Minimum size vdev mapping to attempt to condense (see +\fBzfs_condense_indirect_vdevs_enable\fR). +.sp +Default value: \fB131,072\fR. +.RE + +.sp +.ne 2 +.na \fBzfs_dbgmsg_enable\fR (int) .ad .RS 12n |