lvm2/conf/example.conf.in

# This is an example configuration file for the LVM2 system.
# It contains the default settings that would be used if there was no
# @DEFAULT_SYS_DIR@/lvm.conf file.
#
# Refer to 'man lvm.conf' for further information including the file layout.
#
# Refer to 'man lvm.conf' for information about how settings configured in
# this file are combined with built-in values and command line options to
# arrive at the final values used by LVM.
#
# Refer to 'man lvmconfig' for information about displaying the built-in
# and configured values used by LVM.
#
# If a default value is set in this file (not commented out), then a
# new version of LVM using this file will continue using that value,
# even if the new version of LVM changes the built-in default value.
#
# To put this file in a different directory and override @DEFAULT_SYS_DIR@ set
# the environment variable LVM_SYSTEM_DIR before running the tools.
#
# N.B. Take care that each setting only appears once if uncommenting
# example settings in this file.


# Configuration section config.
# How LVM configuration settings are handled.
config {

	# Configuration option config/checks.
	# If enabled, any LVM configuration mismatch is reported.
	# This implies checking that the configuration key is understood
	# by LVM and that the value of the key is the proper type.
	# If disabled, any configuration mismatch is ignored and the default
	# value is used without any warning (a message about the
	# configuration key not being found is issued in verbose mode only).
	checks = 1

	# Configuration option config/abort_on_errors.
	# Abort the LVM process if a configuration mismatch is found.
	abort_on_errors = 0

	# Configuration option config/profile_dir.
	# Directory where LVM looks for configuration profiles.
	profile_dir = "@DEFAULT_SYS_DIR@/@DEFAULT_PROFILE_SUBDIR@"
}

# Configuration section devices.
# How LVM uses block devices.
devices {

	# Configuration option devices/dir.
	# Directory in which to create volume group device nodes.
	# Commands also accept this as a prefix on volume group names.
	# This configuration option is advanced.
	dir = "/dev"

	# Configuration option devices/scan.
	# Directories containing device nodes to use with LVM.
	# This configuration option is advanced.
	scan = [ "/dev" ]

	# Configuration option devices/obtain_device_list_from_udev.
	# Obtain the list of available devices from udev.
	# This avoids opening or using any inapplicable non-block
	# devices or subdirectories found in the udev directory.
	# Any device node or symlink not managed by udev in the udev
	# directory is ignored. This setting applies only to the
	# udev-managed device directory; other directories will be
	# scanned fully. LVM needs to be compiled with udev support
	# for this setting to apply.
	obtain_device_list_from_udev = 1

	# Configuration option devices/external_device_info_source.
	# Select an external device information source.
	# Some information may already be available in the system and
	# LVM can use this information to determine the exact type
	# or use of devices it processes. Using an existing external
	# device information source can speed up device processing
	# as LVM does not need to run its own native routines to acquire
	# this information. For example, this information is used to
	# drive LVM filtering like MD component detection, multipath
	# component detection, partition detection and others.
	# Possible options are: none, udev.
	# none - No external device information source is used.
	# udev - Reuse existing udev database records. Applicable
	# only if LVM is compiled with udev support.
	external_device_info_source = "none"

	# Configuration option devices/preferred_names.
	# Select which path name to display for a block device.
	# If multiple path names exist for a block device,
	# and LVM needs to display a name for the device,
	# the path names are matched against each item in
	# this list of regular expressions. The first match is used.
	# Try to avoid using undescriptive /dev/dm-N names, if present.
	# If no preferred name matches, or if preferred_names are not
	# defined, built-in rules are used until one produces a preference.
	# Rule 1 checks path prefixes and gives preference in this order:
	# /dev/mapper, /dev/disk, /dev/dm-*, /dev/block (/dev from devices/dev)
	# Rule 2 prefers the path with the least slashes.
	# Rule 3 prefers a symlink.
	# Rule 4 prefers the path with least value in lexicographical order.
	# Example:
	# preferred_names = [ "^/dev/mpath/", "^/dev/mapper/mpath", "^/dev/[hs]d" ]
	# This configuration option does not have a default value defined.

	# Configuration option devices/filter.
	# Limit the block devices that are used by LVM commands.
	# This is a list of regular expressions used to accept or
	# reject block device path names.  Each regex is delimited
	# by a vertical bar '|' (or any character) and is preceded
	# by 'a' to accept the path, or by 'r' to reject the path.
	# The first regex in the list to match the path is used,
	# producing the 'a' or 'r' result for the device.
	# When multiple path names exist for a block device, if any
	# path name matches an 'a' pattern before an 'r' pattern,
	# then the device is accepted. If all the path names match
	# an 'r' pattern first, then the device is rejected.
	# Unmatching path names do not affect the accept or reject
	# decision. If no path names for a device match a pattern,
	# then the device is accepted.
	# Be careful mixing 'a' and 'r' patterns, as the combination
	# might produce unexpected results (test any changes.)
	# Run vgscan after changing the filter to regenerate the cache.
	# See the use_lvmetad comment for a special case regarding filters.
	# Example:
	# Accept every block device.
	# filter = [ "a|.*/|" ]
	# Example:
	# Reject the cdrom drive.
	# filter = [ "r|/dev/cdrom|" ]
	# Example:
	# Work with just loopback devices, e.g. for testing.
	# filter = [ "a|loop|", "r|.*|" ]
	# Example:
	# Accept all loop devices and ide drives except hdc.
	# filter = [ "a|loop|", "r|/dev/hdc|", "a|/dev/ide|", "r|.*|" ]
	# Example:
	# Use anchors to be very specific.
	# filter = [ "a|^/dev/hda8$|", "r|.*/|" ]
	# filter = [ "a|.*/|" ]

	# Configuration option devices/global_filter.
	# Limit the block devices that are used by LVM system components.
	# Because devices/filter may be overridden from the command line,
	# it is not suitable for system-wide device filtering, e.g. udev
	# and lvmetad. Use global_filter to hide devices from these LVM
	# system components. The syntax is the same as devices/filter.
	# Devices rejected by global_filter are not opened by LVM.
	# global_filter = [ "a|.*/|" ]

	# Configuration option devices/cache_dir.
	# Directory in which to store the device cache file.
	# The results of filtering are cached on disk to avoid
	# rescanning dud devices (which can take a very long time).
	# By default this cache is stored in a file named .cache.
	# It is safe to delete this file; the tools regenerate it.
	# If obtain_device_list_from_udev is enabled, the list of devices
	# is obtained from udev and any existing .cache file is removed.
	cache_dir = "@DEFAULT_SYS_DIR@/@DEFAULT_CACHE_SUBDIR@"

	# Configuration option devices/cache_file_prefix.
	# A prefix used before the .cache file name. See devices/cache_dir.
	cache_file_prefix = ""

	# Configuration option devices/write_cache_state.
	# Enable/disable writing the cache file. See devices/cache_dir.
	write_cache_state = 1

	# Configuration option devices/types.
	# List of additional acceptable block device types.
	# These are of device type names from /proc/devices,
	# followed by the maximum number of partitions.
	# Example:
	# types = [ "fd", 16 ]
	# This configuration option is advanced.
	# This configuration option does not have a default value defined.

	# Configuration option devices/sysfs_scan.
	# Restrict device scanning to block devices appearing in sysfs.
	# This is a quick way of filtering out block devices that are
	# not present on the system. sysfs must be part of the kernel
	# and mounted.)
	sysfs_scan = 1

	# Configuration option devices/multipath_component_detection.
	# Ignore devices that are components of DM multipath devices.
	multipath_component_detection = 1

	# Configuration option devices/md_component_detection.
	# Ignore devices that are components of software RAID (md) devices.
	md_component_detection = 1

	# Configuration option devices/fw_raid_component_detection.
	# Ignore devices that are components of firmware RAID devices.
	# LVM must use an external_device_info_source other than none
	# for this detection to execute.
	fw_raid_component_detection = 0

	# Configuration option devices/md_chunk_alignment.
	# Align PV data blocks with md device's stripe-width.
	# This applies if a PV is placed directly on an md device.
	md_chunk_alignment = 1

	# Configuration option devices/default_data_alignment.
	# Default alignment of the start of a PV data area in MB.
	# If set to 0, a value of 64KB will be used.
	# Set to 1 for 1MiB, 2 for 2MiB, etc.
	# default_data_alignment = 1

	# Configuration option devices/data_alignment_detection.
	# Detect PV data alignment based on sysfs device information.
	# The start of a PV data area will be a multiple of
	# minimum_io_size or optimal_io_size exposed in sysfs.
	# minimum_io_size is the smallest request the device can perform
	# without incurring a read-modify-write penalty, e.g. MD chunk size.
	# optimal_io_size is the device's preferred unit of receiving I/O,
	# e.g. MD stripe width.
	# minimum_io_size is used if optimal_io_size is undefined (0).
	# If md_chunk_alignment is enabled, that detects the optimal_io_size.
	# This setting takes precedence over md_chunk_alignment.
	data_alignment_detection = 1

	# Configuration option devices/data_alignment.
	# Alignment of the start of a PV data area in KB.
	# If a PV is placed directly on an md device and
	# md_chunk_alignment or data_alignment_detection are enabled,
	# then this setting is ignored.  Otherwise, md_chunk_alignment
	# and data_alignment_detection are disabled if this is set.
	# Set to 0 to use the default alignment or the page size, if larger.
	data_alignment = 0

	# Configuration option devices/data_alignment_offset_detection.
	# Detect PV data alignment offset based on sysfs device information.
	# The start of a PV aligned data area will be shifted by the
	# alignment_offset exposed in sysfs.  This offset is often 0, but
	# may be non-zero.  Certain 4KB sector drives that compensate for
	# windows partitioning will have an alignment_offset of 3584 bytes
	# (sector 7 is the lowest aligned logical block, the 4KB sectors start
	# at LBA -1, and consequently sector 63 is aligned on a 4KB boundary).
	# pvcreate --dataalignmentoffset will skip this detection.
	data_alignment_offset_detection = 1

	# Configuration option devices/ignore_suspended_devices.
	# Ignore DM devices that have I/O suspended while scanning devices.
	# Otherwise, LVM waits for a suspended device to become accessible.
	# This should only be needed in recovery situations.
	ignore_suspended_devices = 0

	# Configuration option devices/ignore_lvm_mirrors.
	# Do not scan 'mirror' LVs to avoid possible deadlocks.
	# This avoids possible deadlocks when using the 'mirror'
	# segment type.  This setting determines whether logical volumes
	# using the 'mirror' segment type are scanned for LVM labels.
	# This affects the ability of mirrors to be used as physical volumes.
	# If this setting is enabled, it becomes impossible to create VGs
	# on top of mirror LVs, i.e. to stack VGs on mirror LVs.
	# If this setting is disabled, allowing mirror LVs to be scanned,
	# it may cause LVM processes and I/O to the mirror to become blocked.
	# This is due to the way that the mirror segment type handles failures.
	# In order for the hang to occur, an LVM command must be run just after
	# a failure and before the automatic LVM repair process takes place,
	# or there must be failures in multiple mirrors in the same VG at the
	# same time with write failures occurring moments before a scan of the
	# mirror's labels.
	# The 'mirror' scanning problems do not apply to LVM RAID types like
	# 'raid1' which handle failures in a different way, making them a
	# better choice for VG stacking.
	ignore_lvm_mirrors = 1

	# Configuration option devices/disable_after_error_count.
	# Number of I/O errors after which a device is skipped.
	# During each LVM operation, errors received from each device
	# are counted. If the counter of a device exceeds the limit set
	# here, no further I/O is sent to that device for the remainder
	# of the operation.
	# Setting this to 0 disables the counters altogether.
	disable_after_error_count = 0

	# Configuration option devices/require_restorefile_with_uuid.
	# Allow use of pvcreate --uuid without requiring --restorefile.
	require_restorefile_with_uuid = 1

	# Configuration option devices/pv_min_size.
	# Minimum size (in KB) of block devices which can be used as PVs.
	# In a clustered environment all nodes must use the same value.
	# Any value smaller than 512KB is ignored.  The previous built-in
	# value was 512.
	pv_min_size = 2048

	# Configuration option devices/issue_discards.
	# Issue discards to PVs that are no longer used by an LV.
	# Discards are sent to an LV's underlying physical volumes when
	# the LV is no longer using the physical volumes' space, e.g.
	# lvremove, lvreduce.  Discards inform the storage that a region
	# is no longer used.  Storage that supports discards advertise
	# the protocol-specific way discards should be issued by the
	# kernel (TRIM, UNMAP, or WRITE SAME with UNMAP bit set).
	# Not all storage will support or benefit from discards, but SSDs
	# and thinly provisioned LUNs generally do.  If enabled, discards
	# will only be issued if both the storage and kernel provide support.
	issue_discards = 0
}

# Configuration section allocation.
# How LVM selects free space for Logical Volumes.
allocation {

	# Configuration option allocation/cling_tag_list.
	# Advise LVM which PVs to use when searching for new space.
	# When searching for free space to extend an LV, the 'cling'
	# allocation policy will choose space on the same PVs as the last
	# segment of the existing LV.  If there is insufficient space and a
	# list of tags is defined here, it will check whether any of them are
	# attached to the PVs concerned and then seek to match those PV tags
	# between existing extents and new extents.
	# Example:
	# Use the special tag "@*" as a wildcard to match any PV tag.
	# cling_tag_list = [ "@*" ]
	# Example:
	# LVs are mirrored between two sites within a single VG.
	# PVs are tagged with either @site1 or @site2 to indicate where
	# they are situated.
	# cling_tag_list = [ "@site1", "@site2" ]
	# This configuration option does not have a default value defined.

	# Configuration option allocation/maximise_cling.
	# Use a previous allocation algorithm.
	# Changes made in version 2.02.85 extended the reach of the 'cling'
	# policies to detect more situations where data can be grouped onto
	# the same disks.  This setting can be used to disable the changes
	# and revert to the previous algorithm.
	maximise_cling = 1

	# Configuration option allocation/use_blkid_wiping.
	# Use blkid to detect existing signatures on new PVs and LVs.
	# The blkid library can detect more signatures than the
	# native LVM detection code, but may take longer.
	# LVM needs to be compiled with blkid wiping support for
	# this setting to apply.
	# LVM native detection code is currently able to recognize:
	# MD device signatures, swap signature, and LUKS signatures.
	# To see the list of signatures recognized by blkid, check the
	# output of the 'blkid -k' command.
	use_blkid_wiping = @DEFAULT_USE_BLKID_WIPING@

	# Configuration option allocation/wipe_signatures_when_zeroing_new_lvs.
	# Look for and erase any signatures while zeroing a new LV.
	# Zeroing is controlled by the -Z/--zero option, and if not
	# specified, zeroing is used by default if possible.
	# Zeroing simply overwrites the first 4 KiB of a new LV
	# with zeroes and does no signature detection or wiping.
	# Signature wiping goes beyond zeroing and detects exact
	# types and positions of signatures within the whole LV.
	# It provides a cleaner LV after creation as all known
	# signatures are wiped.  The LV is not claimed incorrectly
	# by other tools because of old signatures from previous use.
	# The number of signatures that LVM can detect depends on the
	# detection code that is selected (see use_blkid_wiping.)
	# Wiping each detected signature must be confirmed.
	# The command line option -W/--wipesignatures takes precedence
	# over this setting.
	# When this setting is disabled, signatures on new LVs are
	# not detected or erased unless the -W/--wipesignatures y
	# option is used directly.
	wipe_signatures_when_zeroing_new_lvs = 1

	# Configuration option allocation/mirror_logs_require_separate_pvs.
	# Mirror logs and images will always use different PVs.
	# The default setting changed in version 2.02.85.
	mirror_logs_require_separate_pvs = 0

	# Configuration option allocation/cache_pool_metadata_require_separate_pvs.
	# Cache pool metadata and data will always use different PVs.
	cache_pool_metadata_require_separate_pvs = 0

	# Configuration option allocation/cache_pool_cachemode.
	# The default cache mode used for new cache pools.
	# Possible options are: writethrough, writeback.
	# writethrough - Data blocks are immediately written from
	# the cache to disk.
	# writeback - Data blocks are written from the cache back
	# to disk after some delay to improve performance.
	# cache_pool_cachemode = "writethrough"

	# Configuration option allocation/cache_pool_chunk_size.
	# The minimal chunk size (in kiB) for cache pool volumes.
	# Using a chunk_size that is too large can result in wasteful
	# use of the cache, where small reads and writes can cause
	# large sections of an LV to be mapped into the cache.  However,
	# choosing a chunk_size that is too small can result in more
	# overhead trying to manage the numerous chunks that become mapped
	# into the cache.  The former is more of a problem than the latter
	# in most cases, so we default to a value that is on the smaller
	# end of the spectrum.  Supported values range from 32(kiB) to
	# 1048576 in multiples of 32.
	# This configuration option does not have a default value defined.

	# Configuration option allocation/thin_pool_metadata_require_separate_pvs.
	# Thin pool metdata and data will always use different PVs.
	thin_pool_metadata_require_separate_pvs = 0

	# Configuration option allocation/thin_pool_zero.
	# Thin pool data chunks are zeroed before they are first used.
	# Zeroing with a larger thin pool chunk size reduces performance.
	# thin_pool_zero = 1

	# Configuration option allocation/thin_pool_discards.
	# The discards behaviour of thin pool volumes.
	# Possible options are: ignore, nopassdown, passdown.
	# thin_pool_discards = "passdown"

	# Configuration option allocation/thin_pool_chunk_size_policy.
	# The chunk size calculation policy for thin pool volumes.
	# Possible options are: generic, performance.
	# generic - If thin_pool_chunk_size is defined, use it.
	# Otherwise, calculate the chunk size based on estimation and
	# device hints exposed in sysfs - the minimum_io_size.
	# The chunk size is always at least 64KiB.
	# performance - If thin_pool_chunk_size is defined, use it.
	# Otherwise, calculate the chunk size for performance based on
	# device hints exposed in sysfs - the optimal_io_size.
	# The chunk size is always at least 512KiB.
	# thin_pool_chunk_size_policy = "generic"

	# Configuration option allocation/thin_pool_chunk_size.
	# The minimal chunk size (in KB) for thin pool volumes.
	# Larger chunk sizes may improve performance for plain
	# thin volumes, however using them for snapshot volumes
	# is less efficient, as it consumes more space and takes
	# extra time for copying.  When unset, lvm tries to estimate
	# chunk size starting from 64KB.  Supported values are in
	# the range 64 to 1048576.
	# This configuration option does not have a default value defined.

	# Configuration option allocation/physical_extent_size.
	# Default physical extent size to use for new VGs (in KB).
	# physical_extent_size = 4096
}

# Configuration section log.
# How LVM log information is reported.
log {

	# Configuration option log/verbose.
	# Controls the messages sent to stdout or stderr.
	verbose = 0

	# Configuration option log/silent.
	# Suppress all non-essential messages from stdout.
	# This has the same effect as -qq.
	# When enabled, the following commands still produce output:
	# dumpconfig, lvdisplay, lvmdiskscan, lvs, pvck, pvdisplay,
	# pvs, version, vgcfgrestore -l, vgdisplay, vgs.
	# Non-essential messages are shifted from log level 4 to log level 5
	# for syslog and lvm2_log_fn purposes.
	# Any 'yes' or 'no' questions not overridden by other arguments
	# are suppressed and default to 'no'.
	silent = 0

	# Configuration option log/syslog.
	# Send log messages through syslog.
	syslog = 1

	# Configuration option log/file.
	# Write error and debug log messages to a file specified here.
	# This configuration option does not have a default value defined.

	# Configuration option log/overwrite.
	# Overwrite the log file each time the program is run.
	overwrite = 0

	# Configuration option log/level.
	# The level of log messages that are sent to the log file or syslog.
	# There are 6 syslog-like log levels currently in use: 2 to 7 inclusive.
	# 7 is the most verbose (LOG_DEBUG).
	level = 0

	# Configuration option log/indent.
	# Indent messages according to their severity.
	indent = 1

	# Configuration option log/command_names.
	# Display the command name on each line of output.
	command_names = 0

	# Configuration option log/prefix.
	# A prefix to use before the log message text.
	# (After the command name, if selected).
	# Two spaces allows you to see/grep the severity of each message.
	# To make the messages look similar to the original LVM tools use:
	# indent = 0, command_names = 1, prefix = " -- "
	prefix = "  "

	# Configuration option log/activation.
	# Log messages during activation.
	# Don't use this in low memory situations (can deadlock).
	activation = 0

	# Configuration option log/debug_classes.
	# Select log messages by class.
	# Some debugging messages are assigned to a class
	# and only appear in debug output if the class is
	# listed here.  Classes currently available:
	# memory, devices, activation, allocation,
	# lvmetad, metadata, cache, locking, lvmpolld.
	# Use "all" to see everything.
	debug_classes = [ "memory", "devices", "activation", "allocation", "lvmetad", "metadata", "cache", "locking", "lvmpolld" ]
}

# Configuration section backup.
# How LVM metadata is backed up and archived.
# In LVM, a 'backup' is a copy of the metadata for the
# current system, and an 'archive' contains old metadata
# configurations. They are stored in a human readable
# text format.
backup {

	# Configuration option backup/backup.
	# Maintain a backup of the current metadata configuration.
	# Think very hard before turning this off!
	backup = 1

	# Configuration option backup/backup_dir.
	# Location of the metadata backup files.
	# Remember to back up this directory regularly!
	backup_dir = "@DEFAULT_SYS_DIR@/@DEFAULT_BACKUP_SUBDIR@"

	# Configuration option backup/archive.
	# Maintain an archive of old metadata configurations.
	# Think very hard before turning this off.
	archive = 1

	# Configuration option backup/archive_dir.
	# Location of the metdata archive files.
	# Remember to back up this directory regularly!
	archive_dir = "@DEFAULT_SYS_DIR@/@DEFAULT_ARCHIVE_SUBDIR@"

	# Configuration option backup/retain_min.
	# Minimum number of archives to keep.
	retain_min = 10

	# Configuration option backup/retain_days.
	# Minimum number of days to keep archive files.
	retain_days = 30
}

# Configuration section shell.
# Settings for running LVM in shell (readline) mode.
shell {

	# Configuration option shell/history_size.
	# Number of lines of history to store in ~/.lvm_history.
	history_size = 100
}

# Configuration section global.
# Miscellaneous global LVM settings.
global {

	# Configuration option global/umask.
	# The file creation mask for any files and directories created.
	# Interpreted as octal if the first digit is zero.
	umask = 077

	# Configuration option global/test.
	# No on-disk metadata changes will be made in test mode.
	# Equivalent to having the -t option on every command.
	test = 0

	# Configuration option global/units.
	# Default value for --units argument.
	units = "h"

	# Configuration option global/si_unit_consistency.
	# Distinguish between powers of 1024 and 1000 bytes.
	# The LVM commands distinguish between powers of 1024 bytes,
	# e.g. KiB, MiB, GiB, and powers of 1000 bytes, e.g. KB, MB, GB.
	# If scripts depend on the old behaviour, disable
	# this setting temporarily until they are updated.
	si_unit_consistency = 1

	# Configuration option global/suffix.
	# Display unit suffix for sizes.
	# This setting has no effect if the units are in human-readable
	# form (global/units = "h") in which case the suffix is always
	# displayed.
	suffix = 1

	# Configuration option global/activation.
	# Enable/disable communication with the kernel device-mapper.
	# Disable to use the tools to manipulate LVM metadata without
	# activating any logical volumes. If the device-mapper driver
	# is not present in the kernel, disabling this should suppress
	# the error messages.
	activation = 1

	# Configuration option global/fallback_to_lvm1.
	# Try running LVM1 tools if LVM cannot communicate with DM.
	# This option only applies to 2.4 kernels and is provided to
	# help switch between device-mapper kernels and LVM1 kernels.
	# The LVM1 tools need to be installed with .lvm1 suffices,
	# e.g. vgscan.lvm1. They will stop working once the lvm2
	# on-disk metadata format is used.
	# fallback_to_lvm1 = 1

	# Configuration option global/format.
	# The default metadata format that commands should use.
	# "lvm1" or "lvm2".
	# The command line override is -M1 or -M2.
	# format = "lvm2"

	# Configuration option global/format_libraries.
	# Shared libraries that process different metadata formats.
	# If support for LVM1 metadata was compiled as a shared library use
	# format_libraries = "liblvm2format1.so"
	# This configuration option does not have a default value defined.

	# Configuration option global/segment_libraries.
	# This configuration option does not have a default value defined.

	# Configuration option global/proc.
	# Location of proc filesystem.
	# This configuration option is advanced.
	proc = "/proc"

	# Configuration option global/etc.
	# Location of /etc system configuration directory.
	etc = "@CONFDIR@"

	# Configuration option global/locking_type.
	# Type of locking to use.
	# Type 0: turns off locking. Warning: this risks metadata
	# corruption if commands run concurrently.
	# Type 1: uses local file-based locking, the standard mode.
	# Type 2: uses the external shared library locking_library.
	# Type 3: uses built-in clustered locking with clvmd.
	# This is incompatible with lvmetad. If use_lvmetad is enabled,
	# lvm prints a warning and disables lvmetad use.
	# Type 4: uses read-only locking which forbids any operations
	# that might change metadata.
	# Type 5: offers dummy locking for tools that do not need any locks.
	# You should not need to set this directly; the tools will select
	# when to use it instead of the configured locking_type.
	# Do not use lvmetad or the kernel device-mapper driver with this
	# locking type. It is used by the --readonly option that offers
	# read-only access to Volume Group metadata that cannot be locked
	# safely because it belongs to an inaccessible domain and might be
	# in use, for example a virtual machine image or a disk that is
	# shared by a clustered machine.
	locking_type = 1

	# Configuration option global/wait_for_locks.
	# When disabled, fail if a lock request would block.
	wait_for_locks = 1

	# Configuration option global/fallback_to_clustered_locking.
	# Attempt to use built-in cluster locking if locking_type 2 fails.
	# If using external locking (type 2) and initialisation fails,
	# with this enabled, an attempt will be made to use the built-in
	# clustered locking.
	# If you are using a customised locking_library you should disable this.
	fallback_to_clustered_locking = 1

	# Configuration option global/fallback_to_local_locking.
	# Use locking_type 1 (local) if locking_type 2 or 3 fail.
	# If an attempt to initialise type 2 or type 3 locking failed,
	# perhaps because cluster components such as clvmd are not
	# running, with this enabled, an attempt will be made to use
	# local file-based locking (type 1). If this succeeds, only
	# commands against local volume groups will proceed.
	# Volume Groups marked as clustered will be ignored.
	fallback_to_local_locking = 1

	# Configuration option global/locking_dir.
	# Directory to use for LVM command file locks.
	# Local non-LV directory that holds file-based locks
	# while commands are in progress.  A directory like
	# /tmp that may get wiped on reboot is OK.
	locking_dir = "@DEFAULT_LOCK_DIR@"

	# Configuration option global/prioritise_write_locks.
	# Allow quicker VG write access during high volume read access.
	# When there are competing read-only and read-write access
	# requests for a volume group's metadata, instead of always
	# granting the read-only requests immediately, delay them to
	# allow the read-write requests to be serviced.  Without this
	# setting, write access may be stalled by a high volume of
	# read-only requests.
	# This option only affects locking_type 1 viz.
	# local file-based locking.
	prioritise_write_locks = 1

	# Configuration option global/library_dir.
	# Search this directory first for shared libraries.
	# This configuration option does not have a default value defined.

	# Configuration option global/locking_library.
	# The external locking library to use for locking_type 2.
	# locking_library = "liblvm2clusterlock.so"

	# Configuration option global/abort_on_internal_errors.
	# Abort a command that encounters an internal error.
	# Treat any internal errors as fatal errors, aborting
	# the process that encountered the internal error.
	# Please only enable for debugging.
	abort_on_internal_errors = 0

	# Configuration option global/detect_internal_vg_cache_corruption.
	# Internal verification of VG structures.
	# Check if CRC matches when a parsed VG is
	# used multiple times. This is useful to catch
	# unexpected changes to cached VG structures.
	# Please only enable for debugging.
	detect_internal_vg_cache_corruption = 0

	# Configuration option global/metadata_read_only.
	# No operations that change on-disk metadata are permitted.
	# Additionally, read-only commands that encounter metadata
	# in need of repair will still be allowed to proceed exactly
	# as if the repair had been performed (except for the unchanged
	# vg_seqno). Inappropriate use could mess up your system,
	# so seek advice first!
	metadata_read_only = 0

	# Configuration option global/mirror_segtype_default.
	# The segment type used by the short mirroring option -m.
	# Possible options are: mirror, raid1.
	# mirror - the original RAID1 implementation from LVM/DM.
	# It is characterized by a flexible log solution (core,
	# disk, mirrored), and by the necessity to block I/O while
	# handling a failure.
	# There is an inherent race in the dmeventd failure
	# handling logic with snapshots of devices using this
	# type of RAID1 that in the worst case could cause a
	# deadlock. (Also see devices/ignore_lvm_mirrors.)
	# raid1 - a newer RAID1 implementation using the MD RAID1
	# personality through device-mapper.  It is characterized
	# by a lack of log options. (A log is always allocated for
	# every device and they are placed on the same device as the
	# image - no separate devices are required.)  This mirror
	# implementation does not require I/O to be blocked while
	# handling a failure. This mirror implementation is not
	# cluster-aware and cannot be used in a shared (active/active)
	# fashion in a cluster.
	# The '--type mirror|raid1' option overrides this setting.
	mirror_segtype_default = "@DEFAULT_MIRROR_SEGTYPE@"

	# Configuration option global/raid10_segtype_default.
	# The segment type used by the -i -m combination.
	# The --stripes/-i and --mirrors/-m options can both
	# be specified during the creation of a logical volume
	# to use both striping and mirroring for the LV.
	# There are two different implementations.
	# Possible options are: raid10, mirror.
	# raid10 - LVM uses MD's RAID10 personality through DM.
	# mirror - LVM layers the 'mirror' and 'stripe' segment types.
	# The layering is done by creating a mirror LV on top of
	# striped sub-LVs, effectively creating a RAID 0+1 array.
	# The layering is suboptimal in terms of providing redundancy
	# and performance. The 'raid10' option is perferred.
	# The '--type raid10|mirror' option overrides this setting.
	raid10_segtype_default = "@DEFAULT_RAID10_SEGTYPE@"

	# Configuration option global/sparse_segtype_default.
	# The segment type used by the -V -L combination.
	# The combination of -V and -L options creates a
	# sparse LV. There are two different implementations.
	# Possible options are: snapshot, thin.
	# snapshot - The original snapshot implementation from LVM/DM.
	# It uses an old snapshot that mixes data and metadata within
	# a single COW storage volume and performs poorly when the
	# size of stored data passes hundreds of MB.
	# thin - A newer implementation that uses thin provisioning.
	# It has a bigger minimal chunk size (64KiB) and uses a separate
	# volume for metadata. It has better performance, especially
	# when more data is used.  It also supports full snapshots.
	# The '--type snapshot|thin' option overrides this setting.
	sparse_segtype_default = "@DEFAULT_SPARSE_SEGTYPE@"

	# Configuration option global/lvdisplay_shows_full_device_path.
	# The default format for displaying LV names in lvdisplay was changed
	# in version 2.02.89 to show the LV name and path separately.
	# Previously this was always shown as /dev/vgname/lvname even when that
	# was never a valid path in the /dev filesystem.
	# Enable this option to reinstate the previous format.
	# lvdisplay_shows_full_device_path = 0

	# Configuration option global/use_lvmetad.
	# Use lvmetad to cache metadata and reduce disk scanning.
	# When enabled (and running), lvmetad provides LVM commands
	# with VG metadata and PV state.  LVM commands then avoid
	# reading this information from disks which can be slow.
	# When disabled (or not running), LVM commands fall back to
	# scanning disks to obtain VG metadata.
	# lvmetad is kept updated via udev rules which must be set
	# up for LVM to work correctly. (The udev rules should be
	# installed by default.) Without a proper udev setup, changes
	# in the system's block device configuration will be unknown
	# to LVM, and ignored until a manual 'pvscan --cache' is run.
	# If lvmetad was running while use_lvmetad was disabled,
	# it must be stopped, use_lvmetad enabled, and then started.
	# When using lvmetad, LV activation is switched to an automatic,
	# event-based mode.  In this mode, LVs are activated based on
	# incoming udev events that inform lvmetad when PVs appear on
	# the system. When a VG is complete (all PVs present), it is
	# auto-activated. The auto_activation_volume_list setting
	# controls which LVs are auto-activated (all by default.)
	# When lvmetad is updated (automatically by udev events, or
	# directly by pvscan --cache), devices/filter is ignored and
	# all devices are scanned by default. lvmetad always keeps
	# unfiltered information which is provided to LVM commands.
	# Each LVM command then filters based on devices/filter.
	# This does not apply to other, non-regexp, filtering settings:
	# component filters such as multipath and MD are checked
	# during pvscan --cache.
	# To filter a device and prevent scanning from the LVM system
	# entirely, including lvmetad, use devices/global_filter.
	# lvmetad is not compatible with locking_type 3 (clustering).
	# LVM prints warnings and ignores lvmetad if this combination
	# is seen.
	use_lvmetad = @DEFAULT_USE_LVMETAD@

	# Configuration option global/thin_check_executable.
	# The full path to the thin_check command.
	# LVM uses this command to check that a thin metadata
	# device is in a usable state.
	# When a thin pool is activated and after it is deactivated,
	# this command is run. Activation will only proceed if the
	# command has an exit status of 0.
	# Set to "" to skip this check.  (Not recommended.)
	# Also see thin_check_options.
	# The thin tools are available from the package
	# device-mapper-persistent-data.
	# thin_check_executable = "@THIN_CHECK_CMD@"

	# Configuration option global/thin_dump_executable.
	# The full path to the thin_dump command.
	# LVM uses this command to dump thin pool metadata.
	# (For thin tools, see thin_check_executable.)
	# thin_dump_executable = "@THIN_DUMP_CMD@"

	# Configuration option global/thin_repair_executable.
	# The full path to the thin_repair command.
	# LVM uses this command to repair a thin metadata device
	# if it is in an unusable state.
	# Also see thin_repair_options.
	# (For thin tools, see thin_check_executable.)
	# thin_repair_executable = "@THIN_REPAIR_CMD@"

	# Configuration option global/thin_check_options.
	# List of options passed to the thin_check command.
	# With thin_check version 2.1 or newer you can add
	# --ignore-non-fatal-errors to let it pass through
	# ignorable errors and fix them later.
	# With thin_check version 3.2 or newer you should add
	# --clear-needs-check-flag.
	# thin_check_options = [ "-q" ]

	# Configuration option global/thin_repair_options.
	# List of options passed to the thin_repair command.
	# This configuration option does not have a default value defined.

	# Configuration option global/thin_disabled_features.
	# Features to not use in the thin driver.
	# This can be helpful for testing, or to avoid
	# using a feature that is causing problems.
	# Features: block_size, discards, discards_non_power_2,
	# external_origin, metadata_resize, external_origin_extend,
	# error_if_no_space.
	# Example:
	# thin_disabled_features = [ "discards", "block_size" ]
	# This configuration option does not have a default value defined.

	# Configuration option global/cache_check_executable.
	# The full path to the cache_check command.
	# LVM uses this command to check that a cache metadata
	# device is in a usable state.
	# When a cached LV is activated and after it is deactivated,
	# this command is run. Activation will only proceed if the
	# command has an exit status of 0.
	# Set to "" to skip this check.  (Not recommended.)
	# Also see cache_check_options.
	# The cache tools are available from the package
	# device-mapper-persistent-data.
	# cache_check_executable = "@CACHE_CHECK_CMD@"

	# Configuration option global/cache_dump_executable.
	# The full path to the cache_dump command.
	# LVM uses this command to dump cache pool metadata.
	# (For cache tools, see cache_check_executable.)
	# cache_dump_executable = "@CACHE_DUMP_CMD@"

	# Configuration option global/cache_repair_executable.
	# The full path to the cache_repair command.
	# LVM uses this command to repair a cache metadata device
	# if it is in an unusable state.
	# Also see cache_repair_options.
	# (For cache tools, see cache_check_executable.)
	# cache_repair_executable = "@CACHE_REPAIR_CMD@"

	# Configuration option global/cache_check_options.
	# List of options passed to the cache_check command.
	# cache_check_options = [ "-q" ]

	# Configuration option global/cache_repair_options.
	# List of options passed to the cache_repair command.
	# This configuration option does not have a default value defined.

	# Configuration option global/system_id_source.
	# The method LVM uses to set the local system ID.
	# Volume Groups can also be given a system ID (by
	# vgcreate, vgchange, or vgimport.)
	# A VG on shared storage devices is accessible only
	# to the host with a matching system ID.
	# See 'man lvmsystemid' for information on limitations
	# and correct usage.
	# Possible options are: none, lvmlocal, uname, machineid, file.
	# none - The host has no system ID.
	# lvmlocal - Obtain the system ID from the system_id setting in the
	# 'local' section of an lvm configuration file, e.g. lvmlocal.conf.
	# uname - Set the system ID from the hostname (uname) of the system.
	# System IDs beginning localhost are not permitted.
	# machineid - Use the contents of the machine-id file to set the
	# system ID.  Some systems create this file at installation time.
	# See 'man machine-id' and global/etc.
	# file - Use the contents of another file (system_id_file) to set
	# the system ID.
	system_id_source = "none"

	# Configuration option global/system_id_file.
	# The full path to the file containing a system ID.
	# This is used when system_id_source is set to 'file'.
	# Comments starting with the character # are ignored.
	# This configuration option does not have a default value defined.

	# Configuration option global/use_lvmpolld.
	# Use lvmpolld to supervise long running LVM commands.
	# When enabled, control of long running LVM commands is transferred
	# from the original LVM command to the lvmpolld daemon.  This allows
	# the operation to continue independent of the original LVM command.
	# After lvmpolld takes over, the LVM command displays the progress
	# of the ongoing operation.  lvmpolld itself runs LVM commands to manage
	# the progress of ongoing operations.  lvmpolld can be used as a native
	# systemd service, which allows it to be started on demand, and to use
	# its own control group.  When this option is disabled, LVM commands will
	# supervise long running operations by forking themselves.
	use_lvmpolld = @DEFAULT_USE_LVMPOLLD@
}

# Configuration section activation.
activation {

	# Configuration option activation/checks.
	# Perform internal checks of libdevmapper operations.
	# Useful for debugging problems with activation.
	# Some of the checks may be expensive, so it's best to use
	# this only when there seems to be a problem.
	checks = 0

	# Configuration option activation/udev_sync.
	# Use udev notifications to synchronize udev and LVM.
	# When disabled, LVM commands will not wait for notifications
	# from udev, but continue irrespective of any possible udev
	# processing in the background.  Only use this if udev is not
	# running or has rules that ignore the devices LVM creates.
	# If enabled when udev is not running, and LVM processes
	# are waiting for udev, run 'dmsetup udevcomplete_all' to
	# wake them up.
	# The '--nodevsync' option overrides this setting.
	udev_sync = 1

	# Configuration option activation/udev_rules.
	# Use udev rules to manage LV device nodes and symlinks.
	# When disabled, LVM will manage the device nodes and
	# symlinks for active LVs itself.
	# Manual intervention may be required if this setting is
	# changed while LVs are active.
	udev_rules = 1

	# Configuration option activation/verify_udev_operations.
	# Use extra checks in LVM to verify udev operations.
	# This enables additional checks (and if necessary,
	# repairs) on entries in the device directory after
	# udev has completed processing its events.
	# Useful for diagnosing problems with LVM/udev interactions.
	verify_udev_operations = 0

	# Configuration option activation/retry_deactivation.
	# Retry failed LV deactivation.
	# If LV deactivation fails, LVM will retry for a few
	# seconds before failing. This may happen because a
	# process run from a quick udev rule temporarily opened
	# the device.
	retry_deactivation = 1

	# Configuration option activation/missing_stripe_filler.
	# Method to fill missing stripes when activating an incomplete LV.
	# Using 'error' will make inaccessible parts of the device return
	# I/O errors on access.  You can instead use a device path, in which
	# case, that device will be used in place of missing stripes.
	# Using anything other than 'error' with mirrored or snapshotted
	# volumes is likely to result in data corruption.
	# This configuration option is advanced.
	missing_stripe_filler = "error"

	# Configuration option activation/use_linear_target.
	# Use the linear target to optimize single stripe LVs.
	# When disabled, the striped target is used. The linear
	# target is an optimised version of the striped target
	# that only handles a single stripe.
	use_linear_target = 1

	# Configuration option activation/reserved_stack.
	# Stack size in KB to reserve for use while devices are suspended.
	# Insufficent reserve risks I/O deadlock during device suspension.
	reserved_stack = 64

	# Configuration option activation/reserved_memory.
	# Memory size in KB to reserve for use while devices are suspended.
	# Insufficent reserve risks I/O deadlock during device suspension.
	reserved_memory = 8192

	# Configuration option activation/process_priority.
	# Nice value used while devices are suspended.
	# Use a high priority so that LVs are suspended
	# for the shortest possible time.
	process_priority = -18

	# Configuration option activation/volume_list.
	# Only LVs selected by this list are activated.
	# If this list is defined, an LV is only activated
	# if it matches an entry in this list.
	# If this list is undefined, it imposes no limits
	# on LV activation (all are allowed).
	# Possible options are: vgname, vgname/lvname, @tag, @*
	# vgname is matched exactly and selects all LVs in the VG.
	# vgname/lvname is matched exactly and selects the LV.
	# @tag selects if tag matches a tag set on the LV or VG.
	# @* selects if a tag defined on the host is also set on
	# the LV or VG.  See tags/hosttags.
	# If any host tags exist but volume_list is not defined,
	# a default single-entry list containing '@*' is assumed.
	# Example:
	# volume_list = [ "vg1", "vg2/lvol1", "@tag1", "@*" ]
	# This configuration option does not have a default value defined.

	# Configuration option activation/auto_activation_volume_list.
	# Only LVs selected by this list are auto-activated.
	# This list works like volume_list, but it is used
	# only by auto-activation commands. It does not apply
	# to direct activation commands.
	# If this list is defined, an LV is only auto-activated
	# if it matches an entry in this list.
	# If this list is undefined, it imposes no limits
	# on LV auto-activation (all are allowed.)
	# If this list is defined and empty, i.e. "[]",
	# then no LVs are selected for auto-activation.
	# An LV that is selected by this list for
	# auto-activation, must also be selected by
	# volume_list (if defined) before it is activated.
	# Auto-activation is an activation command that
	# includes the 'a' argument: --activate ay or -a ay,
	# e.g. vgchange -a ay, or lvchange -a ay vgname/lvname.
	# The 'a' (auto) argument for auto-activation is
	# meant to be used by activation commands that are
	# run automatically by the system, as opposed to
	# LVM commands run directly by a user. A user may
	# also use the 'a' flag directly to perform auto-
	# activation.
	# An example of a system-generated auto-activation
	# command is 'pvscan --cache -aay' which is generated
	# when udev and lvmetad detect a new VG has appeared
	# on the system, and want LVs in it to be auto-activated.
	# Possible options are: vgname, vgname/lvname, @tag, @*
	# See volume_list for how these options are matched to LVs.
	# This configuration option does not have a default value defined.

	# Configuration option activation/read_only_volume_list.
	# LVs in this list are activated in read-only mode.
	# If this list is defined, each LV that is to be activated
	# is checked against this list, and if it matches, it is
	# activated in read-only mode.
	# This overrides the permission setting stored in the
	# metadata, e.g. from --permission rw.
	# Possible options are: vgname, vgname/lvname, @tag, @*
	# See volume_list for how these options are matched to LVs.
	# This configuration option does not have a default value defined.

	# Configuration option activation/raid_region_size.
	# Size in KiB of each raid or mirror synchronization region.
	# For raid or mirror segment types, this is the amount of
	# data that is copied at once when initializing, or moved
	# at once by pvmove.
	raid_region_size = 512

	# Configuration option activation/error_when_full.
	# Return errors if a thin pool runs out of space.
	# When enabled, writes to thin LVs immediately return
	# an error if the thin pool is out of data space.
	# When disabled, writes to thin LVs are queued if the
	# thin pool is out of space, and processed when the
	# thin pool data space is extended.
	# New thin pools are assigned the behavior defined here.
	# The '--errorwhenfull y|n' option overrides this setting.
	# error_when_full = 0

	# Configuration option activation/readahead.
	# Setting to use when there is no readahead setting in metadata.
	# Possible options are: none, auto.
	# none - Disable readahead.
	# auto - Use default value chosen by kernel.
	readahead = "auto"

	# Configuration option activation/raid_fault_policy.
	# Defines how a device failure in a RAID LV is handled.
	# This includes LVs that have the following segment types:
	# raid1, raid4, raid5*, and raid6*.
	# If a device in the LV fails, the policy determines the
	# steps perfomed by dmeventd automatically, and the steps
	# perfomed by 'lvconvert --repair --use-policies' run manually.
	# Automatic handling requires dmeventd to be monitoring the LV.
	# Possible options are: warn, allocate.
	# warn - Use the system log to warn the user that a device
	# in the RAID LV has failed.  It is left to the user to run
	# 'lvconvert --repair' manually to remove or replace the failed
	# device.  As long as the number of failed devices does not
	# exceed the redundancy of the logical volume (1 device for
	# raid4/5, 2 for raid6, etc) the LV will remain usable.
	# allocate - Attempt to use any extra physical volumes in the
	# volume group as spares and replace faulty devices.
	raid_fault_policy = "warn"

	# Configuration option activation/mirror_image_fault_policy.
	# Defines how a device failure in a 'mirror' LV is handled.
	# An LV with the 'mirror' segment type is composed of mirror
	# images (copies) and a mirror log.
	# A disk log ensures that a mirror LV does not need to be
	# re-synced (all copies made the same) every time a machine
	# reboots or crashes.
	# If a device in the LV fails, this policy determines the
	# steps perfomed by dmeventd automatically, and the steps
	# performed by 'lvconvert --repair --use-policies' run manually.
	# Automatic handling requires dmeventd to be monitoring the LV.
	# Possible options are: remove, allocate, allocate_anywhere.
	# remove - Simply remove the faulty device and run without it.
	# If the log device fails, the mirror would convert to using
	# an in-memory log.  This means the mirror will not
	# remember its sync status across crashes/reboots and
	# the entire mirror will be re-synced.
	# If a mirror image fails, the mirror will convert to a
	# non-mirrored device if there is only one remaining good copy.
	# allocate - Remove the faulty device and try to allocate space
	# on a new device to be a replacement for the failed device.
	# Using this policy for the log is fast and maintains the
	# ability to remember sync state through crashes/reboots.
	# Using this policy for a mirror device is slow, as it
	# requires the mirror to resynchronize the devices, but it
	# will preserve the mirror characteristic of the device.
	# This policy acts like 'remove' if no suitable device and
	# space can be allocated for the replacement.
	# allocate_anywhere - Not yet implemented. Useful to place
	# the log device temporarily on the same physical volume as
	# one of the mirror images. This policy is not recommended
	# for mirror devices since it would break the redundant nature
	# of the mirror. This policy acts like 'remove' if no suitable
	# device and space can be allocated for the replacement.
	mirror_image_fault_policy = "remove"

	# Configuration option activation/mirror_log_fault_policy.
	# Defines how a device failure in a 'mirror' log LV is handled.
	# The mirror_image_fault_policy description for mirrored LVs
	# also applies to mirrored log LVs.
	mirror_log_fault_policy = "allocate"

	# Configuration option activation/snapshot_autoextend_threshold.
	# Auto-extend a snapshot when its usage exceeds this percent.
	# Setting this to 100 disables automatic extension.
	# The minimum value is 50 (a smaller value is treated as 50.)
	# Also see snapshot_autoextend_percent.
	# Automatic extension requires dmeventd to be monitoring the LV.
	# Example:
	# With snapshot_autoextend_threshold 70 and
	# snapshot_autoextend_percent 20, whenever a snapshot
	# exceeds 70% usage, it will be extended by another 20%.
	# For a 1G snapshot, using 700M will trigger a resize to 1.2G.
	# When the usage exceeds 840M, the snapshot will be extended
	# to 1.44G, and so on.
	snapshot_autoextend_threshold = 100

	# Configuration option activation/snapshot_autoextend_percent.
	# Auto-extending a snapshot adds this percent extra space.
	# The amount of additional space added to a snapshot is this
	# percent of its current size.
	# Also see snapshot_autoextend_threshold.
	snapshot_autoextend_percent = 20

	# Configuration option activation/thin_pool_autoextend_threshold.
	# Auto-extend a thin pool when its usage exceeds this percent.
	# Setting this to 100 disables automatic extension.
	# The minimum value is 50 (a smaller value is treated as 50.)
	# Also see thin_pool_autoextend_percent.
	# Automatic extension requires dmeventd to be monitoring the LV.
	# Example:
	# With thin_pool_autoextend_threshold 70 and
	# thin_pool_autoextend_percent 20, whenever a thin pool
	# exceeds 70% usage, it will be extended by another 20%.
	# For a 1G thin pool, using up 700M will trigger a resize to 1.2G.
	# When the usage exceeds 840M, the thin pool will be extended
	# to 1.44G, and so on.
	thin_pool_autoextend_threshold = 100

	# Configuration option activation/thin_pool_autoextend_percent.
	# Auto-extending a thin pool adds this percent extra space.
	# The amount of additional space added to a thin pool is this
	# percent of its current size.
	thin_pool_autoextend_percent = 20

	# Configuration option activation/mlock_filter.
	# Do not mlock these memory areas.
	# While activating devices, I/O to devices being
	# (re)configured is suspended. As a precaution against
	# deadlocks, LVM pins memory it is using so it is not
	# paged out, and will not require I/O to reread.
	# Groups of pages that are known not to be accessed during
	# activation do not need to be pinned into memory.
	# Each string listed in this setting is compared against
	# each line in /proc/self/maps, and the pages corresponding
	# to lines that match are not pinned.  On some systems,
	# locale-archive was found to make up over 80% of the memory
	# used by the process.
	# Example:
	# mlock_filter = [ "locale/locale-archive", "gconv/gconv-modules.cache" ]
	# This configuration option is advanced.
	# This configuration option does not have a default value defined.

	# Configuration option activation/use_mlockall.
	# Use the old behavior of mlockall to pin all memory.
	# Prior to version 2.02.62, LVM used mlockall() to pin
	# the whole process's memory while activating devices.
	use_mlockall = 0

	# Configuration option activation/monitoring.
	# Monitor LVs that are activated.
	# When enabled, LVM will ask dmeventd to monitor LVs
	# that are activated.
	# The '--ignoremonitoring' option overrides this setting.
	monitoring = 1

	# Configuration option activation/polling_interval.
	# Check pvmove or lvconvert progress at this interval (seconds)
	# When pvmove or lvconvert must wait for the kernel to finish
	# synchronising or merging data, they check and report progress
	# at intervals of this number of seconds.
	# If this is set to 0 and there is only one thing to wait for,
	# there are no progress reports, but the process is awoken
	# immediately once the operation is complete.
	polling_interval = 15

	# Configuration option activation/auto_set_activation_skip.
	# Set the activation skip flag on new thin snapshot LVs.
	# An LV can have a persistent 'activation skip' flag.
	# The flag causes the LV to be skipped during normal activation.
	# The lvchange/vgchange -K option is required to activate LVs
	# that have the activation skip flag set.
	# When this setting is enabled, the activation skip flag is
	# set on new thin snapshot LVs.
	# The '--setactivationskip y|n' option overrides this setting.
	# auto_set_activation_skip = 1

	# Configuration option activation/activation_mode.
	# How LVs with missing devices are activated.
	# Possible options are: complete, degraded, partial.
	# complete - Only allow activation of an LV if all of
	# the Physical Volumes it uses are present.  Other PVs
	# in the Volume Group may be missing.
	# degraded - Like complete, but additionally RAID LVs of
	# segment type raid1, raid4, raid5, radid6 and raid10 will
	# be activated if there is no data loss, i.e. they have
	# sufficient redundancy to present the entire addressable
	# range of the Logical Volume.
	# partial - Allows the activation of any LV even if a
	# missing or failed PV could cause data loss with a
	# portion of the Logical Volume inaccessible.
	# This setting should not normally be used, but may
	# sometimes assist with data recovery.
	# The '--activationmode' option overrides this setting.
	activation_mode = "degraded"
}

# Configuration section metadata.
# metadata {

	# Configuration option metadata/pvmetadatacopies.
	# Number of copies of metadata to store on each PV.
	# Possible options are: 0, 1, 2.
	# If set to 2, two copies of the VG metadata are stored on
	# the PV, one at the front of the PV, and one at the end.
	# If set to 1, one copy is stored at the front of the PV.
	# If set to 0, no copies are stored on the PV. This may
	# be useful with VGs containing large numbers of PVs.
	# The '--pvmetadatacopies' option overrides this setting.
	# This configuration option is advanced.
	# pvmetadatacopies = 1

	# Configuration option metadata/vgmetadatacopies.
	# Number of copies of metadata to maintain for each VG.
	# If set to a non-zero value, LVM automatically chooses which of
	# the available metadata areas to use to achieve the requested
	# number of copies of the VG metadata.  If you set a value larger
	# than the the total number of metadata areas available, then
	# metadata is stored in them all.
	# The value 0 (unmanaged) disables this automatic management
	# and allows you to control which metadata areas are used at
	# the individual PV level using 'pvchange --metadataignore y|n'.
	# The '--vgmetadatacopies' option overrides this setting.
	# vgmetadatacopies = 0

	# Configuration option metadata/pvmetadatasize.
	# Approximate number of sectors to use for each metadata copy.
	# VGs with large numbers of PVs or LVs, or VGs containing
	# complex LV structures, may need additional space for VG
	# metadata. The metadata areas are treated as circular buffers,
	# so unused space becomes filled with an archive of the most
	# recent previous versions of the metadata.
	# pvmetadatasize = 255

	# Configuration option metadata/pvmetadataignore.
	# Ignore metadata areas on a new PV.
	# If metadata areas on a PV are ignored, LVM will not store
	# metadata in them.
	# The '--metadataignore' option overrides this setting.
	# This configuration option is advanced.
	# pvmetadataignore = 0

	# Configuration option metadata/stripesize.
	# This configuration option is advanced.
	# stripesize = 64

	# Configuration option metadata/dirs.
	# Directories holding live copies of text format metadata.
	# These directories must not be on logical volumes!
	# It's possible to use LVM with a couple of directories here,
	# preferably on different (non-LV) filesystems, and with no other
	# on-disk metadata (pvmetadatacopies = 0). Or this can be in
	# addition to on-disk metadata areas.
	# The feature was originally added to simplify testing and is not
	# supported under low memory situations - the machine could lock up.
	# Never edit any files in these directories by hand unless you
	# you are absolutely sure you know what you are doing! Use
	# the supplied toolset to make changes (e.g. vgcfgrestore).
	# Example:
	# dirs = [ "/etc/lvm/metadata", "/mnt/disk2/lvm/metadata2" ]
	# This configuration option is advanced.
	# This configuration option does not have a default value defined.
# }

# Configuration section report.
# LVM report command output formatting.
# report {

	# Configuration option report/compact_output.
	# Do not print empty report fields.
	# Fields that don't have a value set for any of the rows
	# reported are skipped and not printed. Compact output is
	# applicable only if report/buffered is enabled.
	# compact_output = 0

	# Configuration option report/aligned.
	# Align columns in report output.
	# aligned = 1

	# Configuration option report/buffered.
	# Buffer report output.
	# When buffered reporting is used, the report's content is appended
	# incrementally to include each object being reported until the report
	# is flushed to output which normally happens at the end of command
	# execution. Otherwise, if buffering is not used, each object is
	# reported as soon as its processing is finished.
	# buffered = 1

	# Configuration option report/headings.
	# Show headings for columns on report.
	# headings = 1

	# Configuration option report/separator.
	# A separator to use on report after each field.
	# separator = " "

	# Configuration option report/list_item_separator.
	# A separator to use for list items when reported.
	# list_item_separator = ","

	# Configuration option report/prefixes.
	# Use a field name prefix for each field reported.
	# prefixes = 0

	# Configuration option report/quoted.
	# Quote field values when using field name prefixes.
	# quoted = 1

	# Configuration option report/colums_as_rows.
	# Output each column as a row.
	# If set, this also implies report/prefixes=1.
	# colums_as_rows = 0

	# Configuration option report/binary_values_as_numeric.
	# Use binary values 0 or 1 instead of descriptive literal values.
	# For columns that have exactly two valid values to report
	# (not counting the 'unknown' value which denotes that the
	# value could not be determined).
	# binary_values_as_numeric = 0

	# Configuration option report/devtypes_sort.
	# List of columns to sort by when reporting 'lvm devtypes' command.
	# See 'lvm devtypes -o help' for the list of possible fields.
	# devtypes_sort = "devtype_name"

	# Configuration option report/devtypes_cols.
	# List of columns to report for 'lvm devtypes' command.
	# See 'lvm devtypes -o help' for the list of possible fields.
	# devtypes_cols = "devtype_name,devtype_max_partitions,devtype_description"

	# Configuration option report/devtypes_cols_verbose.
	# List of columns to report for 'lvm devtypes' command in verbose mode.
	# See 'lvm devtypes -o help' for the list of possible fields.
	# devtypes_cols_verbose = "devtype_name,devtype_max_partitions,devtype_description"

	# Configuration option report/lvs_sort.
	# List of columns to sort by when reporting 'lvs' command.
	# See 'lvs -o help' for the list of possible fields.
	# lvs_sort = "vg_name,lv_name"

	# Configuration option report/lvs_cols.
	# List of columns to report for 'lvs' command.
	# See 'lvs -o help' for the list of possible fields.
	# lvs_cols = "lv_name,vg_name,lv_attr,lv_size,pool_lv,origin,data_percent,metadata_percent,move_pv,mirror_log,copy_percent,convert_lv"

	# Configuration option report/lvs_cols_verbose.
	# List of columns to report for 'lvs' command in verbose mode.
	# See 'lvs -o help' for the list of possible fields.
	# lvs_cols_verbose = "lv_name,vg_name,seg_count,lv_attr,lv_size,lv_major,lv_minor,lv_kernel_major,lv_kernel_minor,pool_lv,origin,data_percent,metadata_percent,move_pv,copy_percent,mirror_log,convert_lv,lv_uuid,lv_profile"

	# Configuration option report/vgs_sort.
	# List of columns to sort by when reporting 'vgs' command.
	# See 'vgs -o help' for the list of possible fields.
	# vgs_sort = "vg_name"

	# Configuration option report/vgs_cols.
	# List of columns to report for 'vgs' command.
	# See 'vgs -o help' for the list of possible fields.
	# vgs_cols = "vg_name,pv_count,lv_count,snap_count,vg_attr,vg_size,vg_free"

	# Configuration option report/vgs_cols_verbose.
	# List of columns to report for 'vgs' command in verbose mode.
	# See 'vgs -o help' for the list of possible fields.
	# vgs_cols_verbose = "vg_name,vg_attr,vg_extent_size,pv_count,lv_count,snap_count,vg_size,vg_free,vg_uuid,vg_profile"

	# Configuration option report/pvs_sort.
	# List of columns to sort by when reporting 'pvs' command.
	# See 'pvs -o help' for the list of possible fields.
	# pvs_sort = "pv_name"

	# Configuration option report/pvs_cols.
	# List of columns to report for 'pvs' command.
	# See 'pvs -o help' for the list of possible fields.
	# pvs_cols = "pv_name,vg_name,pv_fmt,pv_attr,pv_size,pv_free"

	# Configuration option report/pvs_cols_verbose.
	# List of columns to report for 'pvs' command in verbose mode.
	# See 'pvs -o help' for the list of possible fields.
	# pvs_cols_verbose = "pv_name,vg_name,pv_fmt,pv_attr,pv_size,pv_free,dev_size,pv_uuid"

	# Configuration option report/segs_sort.
	# List of columns to sort by when reporting 'lvs --segments' command.
	# See 'lvs --segments -o help' for the list of possible fields.
	# segs_sort = "vg_name,lv_name,seg_start"

	# Configuration option report/segs_cols.
	# List of columns to report for 'lvs --segments' command.
	# See 'lvs --segments  -o help' for the list of possible fields.
	# segs_cols = "lv_name,vg_name,lv_attr,stripes,segtype,seg_size"

	# Configuration option report/segs_cols_verbose.
	# List of columns to report for 'lvs --segments' command in verbose mode.
	# See 'lvs --segments -o help' for the list of possible fields.
	# segs_cols_verbose = "lv_name,vg_name,lv_attr,seg_start,seg_size,stripes,segtype,stripesize,chunksize"

	# Configuration option report/pvsegs_sort.
	# List of columns to sort by when reporting 'pvs --segments' command.
	# See 'pvs --segments -o help' for the list of possible fields.
	# pvsegs_sort = "pv_name,pvseg_start"

	# Configuration option report/pvsegs_cols.
	# List of columns to sort by when reporting 'pvs --segments' command.
	# See 'pvs --segments -o help' for the list of possible fields.
	# pvsegs_cols = "pv_name,vg_name,pv_fmt,pv_attr,pv_size,pv_free,pvseg_start,pvseg_size"

	# Configuration option report/pvsegs_cols_verbose.
	# List of columns to sort by when reporting 'pvs --segments' command in verbose mode.
	# See 'pvs --segments -o help' for the list of possible fields.
	# pvsegs_cols_verbose = "pv_name,vg_name,pv_fmt,pv_attr,pv_size,pv_free,pvseg_start,pvseg_size,lv_name,seg_start_pe,segtype,seg_pe_ranges"
# }

# Configuration section dmeventd.
# Settings for the LVM event daemon.
dmeventd {

	# Configuration option dmeventd/mirror_library.
	# The library dmeventd uses when monitoring a mirror device.
	# libdevmapper-event-lvm2mirror.so attempts to recover from
	# failures.  It removes failed devices from a volume group and
	# reconfigures a mirror as necessary. If no mirror library is
	# provided, mirrors are not monitored through dmeventd.
	mirror_library = "libdevmapper-event-lvm2mirror.so"

	# Configuration option dmeventd/raid_library.
	# raid_library = "libdevmapper-event-lvm2raid.so"

	# Configuration option dmeventd/snapshot_library.
	# The library dmeventd uses when monitoring a snapshot device.
	# libdevmapper-event-lvm2snapshot.so monitors the filling of
	# snapshots and emits a warning through syslog when the usage
	# exceeds 80%. The warning is repeated when 85%, 90% and
	# 95% of the snapshot is filled.
	snapshot_library = "libdevmapper-event-lvm2snapshot.so"

	# Configuration option dmeventd/thin_library.
	# The library dmeventd uses when monitoring a thin device.
	# libdevmapper-event-lvm2thin.so monitors the filling of
	# a pool and emits a warning through syslog when the usage
	# exceeds 80%. The warning is repeated when 85%, 90% and
	# 95% of the pool is filled.
	thin_library = "libdevmapper-event-lvm2thin.so"

	# Configuration option dmeventd/executable.
	# The full path to the dmeventd binary.
	# executable = "@DMEVENTD_PATH@"
}

# Configuration section tags.
# Host tag settings.
# tags {

	# Configuration option tags/hosttags.
	# Create a host tag using the machine name.
	# The machine name is nodename returned by uname(2).
	# hosttags = 0

	# Configuration section tags/<tag>.
	# Replace this subsection name with a custom tag name.
	# Multiple subsections like this can be created.
	# The '@' prefix for tags is optional.
	# This subsection can contain host_list, which is a
	# list of machine names. If the name of the local
	# machine is found in host_list, then the name of
	# this subsection is used as a tag and is applied
	# to the local machine as a 'host tag'.
	# If this subsection is empty (has no host_list), then
	# the subsection name is always applied as a 'host tag'.
	# Example:
	# The host tag foo is given to all hosts, and the host tag
	# bar is given to the hosts named machine1 and machine2.
	# tags { foo { } bar { host_list = [ "machine1", "machine2" ] } }
	# This configuration section has variable name.
	# tag {

		# Configuration option tags/<tag>/host_list.
		# A list of machine names.
		# These machine names are compared to the nodename
		# returned by uname(2). If the local machine name
		# matches an entry in this list, the name of the
		# subsection is applied to the machine as a 'host tag'.
		# This configuration option does not have a default value defined.
	# }
# }