diff options
Diffstat (limited to 'man/man5')
| -rw-r--r-- | man/man5/Makefile.am | 2 | ||||
| -rw-r--r-- | man/man5/zfs-module-parameters.5 | 1004 |
2 files changed, 1005 insertions, 1 deletions
diff --git a/man/man5/Makefile.am b/man/man5/Makefile.am index aac4d0bfc..bf1b3d1de 100644 --- a/man/man5/Makefile.am +++ b/man/man5/Makefile.am @@ -1,4 +1,4 @@ -man_MANS = vdev_id.conf.5 zpool-features.5 +man_MANS = vdev_id.conf.5 zpool-features.5 zfs-module-parameters.5 EXTRA_DIST = $(man_MANS) install-data-local: diff --git a/man/man5/zfs-module-parameters.5 b/man/man5/zfs-module-parameters.5 new file mode 100644 index 000000000..a54e31f8b --- /dev/null +++ b/man/man5/zfs-module-parameters.5 @@ -0,0 +1,1004 @@ +'\" te +.\" Copyright (c) 2013 by Turbo Fredriksson <[email protected]>. All rights reserved. +.\" 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 +.\" usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. +.\" +.\" See the License for the specific language governing permissions and +.\" limitations under the License. When distributing Covered Code, include this +.\" CDDL HEADER in each file and include the License file at +.\" usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this +.\" 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 "Nov 16, 2013" +.SH NAME +zfs\-module\-parameters \- ZFS module parameters +.SH DESCRIPTION +.sp +.LP +Description of the different parameters to the ZFS module. + +.SS "Module parameters" +.sp +.LP + +.sp +.ne 2 +.na +\fBl2arc_feed_again\fR (int) +.ad +.RS 12n +Turbo L2ARC warmup +.sp +Use \fB1\fR for yes (default) and \fB0\fR to disable. +.RE + +.sp +.ne 2 +.na +\fBl2arc_feed_min_ms\fR (ulong) +.ad +.RS 12n +Min feed interval in milliseconds +.sp +Default value: \fB200\fR. +.RE + +.sp +.ne 2 +.na +\fBl2arc_feed_secs\fR (ulong) +.ad +.RS 12n +Seconds between L2ARC writing +.sp +Default value: \fB1\fR. +.RE + +.sp +.ne 2 +.na +\fBl2arc_headroom\fR (ulong) +.ad +.RS 12n +Number of max device writes to precache +.sp +Default value: \fB2\fR. +.RE + +.sp +.ne 2 +.na +\fBl2arc_headroom_boost\fR (ulong) +.ad +.RS 12n +Compressed l2arc_headroom multiplier +.sp +Default value: \fB200\fR. +.RE + +.sp +.ne 2 +.na +\fBl2arc_nocompress\fR (int) +.ad +.RS 12n +Skip compressing L2ARC buffers +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBl2arc_noprefetch\fR (int) +.ad +.RS 12n +Skip caching prefetched buffers +.sp +Use \fB1\fR for yes (default) and \fB0\fR to disable. +.RE + +.sp +.ne 2 +.na +\fBl2arc_norw\fR (int) +.ad +.RS 12n +No reads during writes +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBl2arc_write_boost\fR (ulong) +.ad +.RS 12n +Extra write bytes during device warmup +.sp +Default value: \fB8,388,608\fR. +.RE + +.sp +.ne 2 +.na +\fBl2arc_write_max\fR (ulong) +.ad +.RS 12n +Max write bytes per interval +.sp +Default value: \fB8,388,608\fR. +.RE + +.sp +.ne 2 +.na +\fBmetaslab_debug\fR (int) +.ad +.RS 12n +Keep space maps in core to verify frees +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBspa_config_path\fR (charp) +.ad +.RS 12n +SPA config file +.sp +Default value: \fB/etc/zfs/zpool.cache\fR. +.RE + +.sp +.ne 2 +.na +\fBzfetch_array_rd_sz\fR (ulong) +.ad +.RS 12n +Number of bytes in a array_read +.sp +Default value: \fB1,048,576\fR. +.RE + +.sp +.ne 2 +.na +\fBzfetch_block_cap\fR (uint) +.ad +.RS 12n +Max number of blocks to fetch at a time +.sp +Default value: \fB256\fR. +.RE + +.sp +.ne 2 +.na +\fBzfetch_max_streams\fR (uint) +.ad +.RS 12n +Max number of streams per zfetch +.sp +Default value: \fB8\fR. +.RE + +.sp +.ne 2 +.na +\fBzfetch_min_sec_reap\fR (uint) +.ad +.RS 12n +Min time before stream reclaim +.sp +Default value: \fB2\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_arc_grow_retry\fR (int) +.ad +.RS 12n +Seconds before growing arc size +.sp +Default value: \fB5\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_arc_max\fR (ulong) +.ad +.RS 12n +Max arc size +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_arc_memory_throttle_disable\fR (int) +.ad +.RS 12n +Disable memory throttle +.sp +Use \fB1\fR for yes (default) and \fB0\fR to disable. +.RE + +.sp +.ne 2 +.na +\fBzfs_arc_meta_limit\fR (ulong) +.ad +.RS 12n +Meta limit for arc size +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_arc_meta_prune\fR (int) +.ad +.RS 12n +Bytes of meta data to prune +.sp +Default value: \fB1,048,576\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_arc_min\fR (ulong) +.ad +.RS 12n +Min arc size +.sp +Default value: \fB100\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_arc_min_prefetch_lifespan\fR (int) +.ad +.RS 12n +Min life of prefetch block +.sp +Default value: \fB100\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_arc_p_min_shift\fR (int) +.ad +.RS 12n +arc_c shift to calc min/max arc_p +.sp +Default value: \fB4\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_arc_shrink_shift\fR (int) +.ad +.RS 12n +log2(fraction of arc to reclaim) +.sp +Default value: \fB5\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_autoimport_disable\fR (int) +.ad +.RS 12n +Disable pool import at module load +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzfs_dbuf_state_index\fR (int) +.ad +.RS 12n +Calculate arc header index +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_deadman_enabled\fR (int) +.ad +.RS 12n +Enable deadman timer +.sp +Use \fB1\fR for yes (default) and \fB0\fR to disable. +.RE + +.sp +.ne 2 +.na +\fBzfs_deadman_synctime\fR (ulong) +.ad +.RS 12n +Expire in units of zfs_txg_synctime_ms +.sp +Default value: \fB1,000\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_dedup_prefetch\fR (int) +.ad +.RS 12n +Enable prefetching dedup-ed blks +.sp +Use \fB1\fR for yes (default) and \fB0\fR to disable. +.RE + +.sp +.ne 2 +.na +\fBzfs_disable_dup_eviction\fR (int) +.ad +.RS 12n +Disable duplicate buffer eviction +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzfs_expire_snapshot\fR (int) +.ad +.RS 12n +Seconds to expire .zfs/snapshot +.sp +Default value: \fB300\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_flags\fR (int) +.ad +.RS 12n +Set additional debugging flags +.sp +Default value: \fB1\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_free_min_time_ms\fR (int) +.ad +.RS 12n +Min millisecs to free per txg +.sp +Default value: \fB1,000\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_immediate_write_sz\fR (long) +.ad +.RS 12n +Largest data block to write to zil +.sp +Default value: \fB32,768\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_mdcomp_disable\fR (int) +.ad +.RS 12n +Disable meta data compression +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzfs_no_scrub_io\fR (int) +.ad +.RS 12n +Set for no scrub I/O +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzfs_no_scrub_prefetch\fR (int) +.ad +.RS 12n +Set for no scrub prefetching +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzfs_no_write_throttle\fR (int) +.ad +.RS 12n +Disable write throttling +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzfs_nocacheflush\fR (int) +.ad +.RS 12n +Disable cache flushes +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzfs_nopwrite_enabled\fR (int) +.ad +.RS 12n +Enable NOP writes +.sp +Use \fB1\fR for yes (default) and \fB0\fR to disable. +.RE + +.sp +.ne 2 +.na +\fBzfs_pd_blks_max\fR (int) +.ad +.RS 12n +Max number of blocks to prefetch +.sp +Default value: \fB100\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_prefetch_disable\fR (int) +.ad +.RS 12n +Disable all ZFS prefetching +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzfs_read_chunk_size\fR (long) +.ad +.RS 12n +Bytes to read per chunk +.sp +Default value: \fB1,048,576\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_read_history\fR (int) +.ad +.RS 12n +Historic statistics for the last N reads +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_read_history_hits\fR (int) +.ad +.RS 12n +Include cache hits in read history +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzfs_recover\fR (int) +.ad +.RS 12n +Set to attempt to recover from fatal errors. This should only be used as a +last resort, as it typically results in leaked space, or worse. +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzfs_resilver_delay\fR (int) +.ad +.RS 12n +Number of ticks to delay resilver +.sp +Default value: \fB2\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_resilver_min_time_ms\fR (int) +.ad +.RS 12n +Min millisecs to resilver per txg +.sp +Default value: \fB3,000\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_scan_idle\fR (int) +.ad +.RS 12n +Idle window in clock ticks +.sp +Default value: \fB50\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_scan_min_time_ms\fR (int) +.ad +.RS 12n +Min millisecs to scrub per txg +.sp +Default value: \fB1,000\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_scrub_delay\fR (int) +.ad +.RS 12n +Number of ticks to delay scrub +.sp +Default value: \fB4\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_sync_pass_deferred_free\fR (int) +.ad +.RS 12n +Defer frees starting in this pass +.sp +Default value: \fB2\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_sync_pass_dont_compress\fR (int) +.ad +.RS 12n +Don't compress starting in this pass +.sp +Default value: \fB5\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_sync_pass_rewrite\fR (int) +.ad +.RS 12n +Rewrite new bps starting in this pass +.sp +Default value: \fB2\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_top_maxinflight\fR (int) +.ad +.RS 12n +Max I/Os per top-level +.sp +Default value: \fB32\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_txg_history\fR (int) +.ad +.RS 12n +Historic statistics for the last N txgs +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_txg_synctime_ms\fR (int) +.ad +.RS 12n +Target milliseconds between txg sync +.sp +Default value: \fB1,000\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_txg_timeout\fR (int) +.ad +.RS 12n +Max seconds worth of delta per txg +.sp +Default value: \fB5\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_vdev_aggregation_limit\fR (int) +.ad +.RS 12n +Max vdev I/O aggregation size +.sp +Default value: \fB131,072\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_vdev_cache_bshift\fR (int) +.ad +.RS 12n +Shift size to inflate reads too +.sp +Default value: \fB16\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_vdev_cache_max\fR (int) +.ad +.RS 12n +Inflate reads small than max +.RE + +.sp +.ne 2 +.na +\fBzfs_vdev_cache_size\fR (int) +.ad +.RS 12n +Total size of the per-disk cache +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_vdev_max_pending\fR (int) +.ad +.RS 12n +Max pending per-vdev I/Os +.sp +Default value: \fB10\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_vdev_min_pending\fR (int) +.ad +.RS 12n +Min pending per-vdev I/Os +.sp +Default value: \fB4\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_vdev_mirror_switch_us\fR (int) +.ad +.RS 12n +Switch mirrors every N usecs +.sp +Default value: \fB10,000\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_vdev_ramp_rate\fR (int) +.ad +.RS 12n +Exponential I/O issue ramp-up rate +.sp +Default value: \fB2\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_vdev_read_gap_limit\fR (int) +.ad +.RS 12n +Aggregate read I/O over gap +.sp +Default value: \fB32,768\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_vdev_scheduler\fR (charp) +.ad +.RS 12n +I/O scheduler +.sp +Default value: \fBnoop\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_vdev_time_shift\fR (int) +.ad +.RS 12n +Deadline time shift for vdev I/O +.sp +Default value: \fB29\fR (each bucket is 0.537 seconds). +.RE + +.sp +.ne 2 +.na +\fBzfs_vdev_write_gap_limit\fR (int) +.ad +.RS 12n +Aggregate write I/O over gap +.sp +Default value: \fB4,096\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_write_limit_inflated\fR (ulong) +.ad +.RS 12n +Inflated txg write limit +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_write_limit_max\fR (ulong) +.ad +.RS 12n +Max txg write limit +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_write_limit_min\fR (ulong) +.ad +.RS 12n +Min txg write limit +.sp +Default value: \fB33,554,432\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_write_limit_override\fR (ulong) +.ad +.RS 12n +Override txg write limit +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_write_limit_shift\fR (int) +.ad +.RS 12n +log2(fraction of memory) per txg +.sp +Default value: \fB3\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_zevent_cols\fR (int) +.ad +.RS 12n +Max event column width +.sp +Default value: \fB80\fR. +.RE + +.sp +.ne 2 +.na +\fBzfs_zevent_console\fR (int) +.ad +.RS 12n +Log events to the console +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzfs_zevent_len_max\fR (int) +.ad +.RS 12n +Max event queue length +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na +\fBzil_replay_disable\fR (int) +.ad +.RS 12n +Disable intent logging replay +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzil_slog_limit\fR (ulong) +.ad +.RS 12n +Max commit bytes to separate log device +.sp +Default value: \fB1,048,576\fR. +.RE + +.sp +.ne 2 +.na +\fBzio_bulk_flags\fR (int) +.ad +.RS 12n +Additional flags to pass to bulk buffers +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na +\fBzio_delay_max\fR (int) +.ad +.RS 12n +Max zio millisec delay before posting event +.sp +Default value: \fB30,000\fR. +.RE + +.sp +.ne 2 +.na +\fBzio_injection_enabled\fR (int) +.ad +.RS 12n +Enable fault injection +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzio_requeue_io_start_cut_in_line\fR (int) +.ad +.RS 12n +Prioritize requeued I/O +.sp +Default value: \fB0\fR. +.RE + +.sp +.ne 2 +.na +\fBzvol_inhibit_dev\fR (uint) +.ad +.RS 12n +Do not create zvol device nodes +.sp +Use \fB1\fR for yes and \fB0\fR for no (default). +.RE + +.sp +.ne 2 +.na +\fBzvol_major\fR (uint) +.ad +.RS 12n +Major number for zvol device +.sp +Default value: \fB230\fR. +.RE + +.sp +.ne 2 +.na +\fBzvol_max_discard_blocks\fR (ulong) +.ad +.RS 12n +Max number of blocks to discard at once +.sp +Default value: \fB16,384\fR. +.RE + +.sp +.ne 2 +.na +\fBzvol_threads\fR (uint) +.ad +.RS 12n +Number of threads for zvol device +.sp +Default value: \fB32\fR. +.RE + |