+++ /dev/null
-# This is an example configuration file for the LVM2 system.
-# It contains the default settings that would be used if there was no
-# /etc/lvm/lvm.conf file.
-#
-# Refer to 'man lvm.conf' for further information including the file layout.
-#
-# To put this file in a different directory and override /etc/lvm 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.
-
-
-# This section allows you to configure which block devices should
-# be used by the LVM system.
-devices {
-
- # Where do you want your volume groups to appear ?
- dir = "/dev"
-
- # An array of directories that contain the device nodes you wish
- # to use with LVM2.
- scan = [ "/dev" ]
-
- # If set, the cache of block device nodes with all associated symlinks
- # will be constructed out of the existing udev database content.
- # This avoids using and opening any inapplicable non-block devices or
- # subdirectories found in the device directory. This setting is applied
- # to udev-managed device directory only, other directories will be scanned
- # fully. LVM2 needs to be compiled with udev support for this setting to
- # take effect. N.B. Any device node or symlink not managed by udev in
- # udev directory will be ignored with this setting on.
- obtain_device_list_from_udev = 1
-
- # If several entries in the scanned directories correspond to the
- # same block device and the tools need to display a name for device,
- # all the pathnames are matched against each item in the following
- # list of regular expressions in turn and the first match is used.
- preferred_names = [ ]
-
- # Try to avoid using undescriptive /dev/dm-N names, if present.
- # preferred_names = [ "^/dev/mpath/", "^/dev/mapper/mpath", "^/dev/[hs]d" ]
-
- # A filter that tells LVM2 to only use a restricted set of devices.
- # The filter consists of an array of regular expressions. These
- # expressions can be delimited by a character of your choice, and
- # prefixed with either an 'a' (for accept) or 'r' (for reject).
- # The first expression found to match a device name determines if
- # the device will be accepted or rejected (ignored). Devices that
- # don't match any patterns are accepted.
-
- # Be careful if there there are symbolic links or multiple filesystem
- # entries for the same device as each name is checked separately against
- # the list of patterns. The effect is that if the first pattern in the
- # list to match a name is an 'a' pattern for any of the names, the device
- # is accepted; otherwise if the first pattern in the list to match a name
- # is an 'r' pattern for any of the names it is rejected; otherwise it is
- # accepted.
-
- # Don't have more than one filter line active at once: only one gets used.
-
- # Run vgscan after you change this parameter to ensure that
- # the cache file gets regenerated (see below).
- # If it doesn't do what you expect, check the output of 'vgscan -vvvv'.
-
-
- # By default we accept every block device:
- #filter = [ "a/.*/" ]
- filter = [ "a|^/dev/sda[0-9]*$|", "r/.*/" ]
-
- # Exclude the cdrom drive
- # filter = [ "r|/dev/cdrom|" ]
-
- # When testing I like to work with just loopback devices:
- # filter = [ "a/loop/", "r/.*/" ]
-
- # Or maybe all loops and ide drives except hdc:
- # filter =[ "a|loop|", "r|/dev/hdc|", "a|/dev/ide|", "r|.*|" ]
-
- # Use anchors if you want to be really specific
- # filter = [ "a|^/dev/hda8$|", "r/.*/" ]
-
- # The results of the filtering are cached on disk to avoid
- # rescanning dud devices (which can take a very long time).
- # By default this cache is stored in the /etc/lvm/cache directory
- # in a file called '.cache'.
- # It is safe to delete the contents: the tools regenerate it.
- # (The old setting 'cache' is still respected if neither of
- # these new ones is present.)
- cache_dir = "/run/lvm"
- cache_file_prefix = ""
-
- # You can turn off writing this cache file by setting this to 0.
- write_cache_state = 1
-
- # Advanced settings.
-
- # List of pairs of additional acceptable block device types found
- # in /proc/devices with maximum (non-zero) number of partitions.
- # types = [ "fd", 16 ]
-
- # If sysfs is mounted (2.6 kernels) restrict device scanning to
- # the block devices it believes are valid.
- # 1 enables; 0 disables.
- sysfs_scan = 1
-
- # By default, LVM2 will ignore devices used as component paths
- # of device-mapper multipath devices.
- # 1 enables; 0 disables.
- multipath_component_detection = 1
-
- # By default, LVM2 will ignore devices used as components of
- # software RAID (md) devices by looking for md superblocks.
- # 1 enables; 0 disables.
- md_component_detection = 1
-
- # By default, if a PV is placed directly upon an md device, LVM2
- # will align its data blocks with the md device's stripe-width.
- # 1 enables; 0 disables.
- md_chunk_alignment = 1
-
- # Default alignment of the start of a 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
-
- # By default, the start of a PV's data area will be a multiple of
- # the 'minimum_io_size' or 'optimal_io_size' exposed in sysfs.
- # - minimum_io_size - the smallest request the device can perform
- # w/o incurring a read-modify-write penalty (e.g. MD's chunk size)
- # - optimal_io_size - the device's preferred unit of receiving I/O
- # (e.g. MD's 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.
- # 1 enables; 0 disables.
- data_alignment_detection = 1
-
- # Alignment (in KB) of start of data area when creating a new PV.
- # md_chunk_alignment and data_alignment_detection are disabled if set.
- # Set to 0 for the default alignment (see: data_alignment_default)
- # or page size, if larger.
- data_alignment = 0
-
- # By default, the start of the PV's aligned data area will be shifted by
- # the 'alignment_offset' exposed in sysfs. This offset is often 0 but
- # may be non-zero; e.g.: 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).
- # But note that pvcreate --dataalignmentoffset will skip this detection.
- # 1 enables; 0 disables.
- data_alignment_offset_detection = 1
-
- # If, while scanning the system for PVs, LVM2 encounters a device-mapper
- # device that has its I/O suspended, it waits for it to become accessible.
- # Set this to 1 to skip such devices. This should only be needed
- # in recovery situations.
- ignore_suspended_devices = 0
-
- # During each LVM operation errors received from each device are counted.
- # If the counter of a particular device exceeds the limit set here, no
- # further I/O is sent to that device for the remainder of the respective
- # operation. Setting the parameter to 0 disables the counters altogether.
- disable_after_error_count = 0
-
- # Allow use of pvcreate --uuid without requiring --restorefile.
- require_restorefile_with_uuid = 1
-
- # 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.
-
- # Ignore devices smaller than 2MB such as floppy drives.
- pv_min_size = 2048
-
- # The original built-in setting was 512 up to and including version 2.02.84.
- # pv_min_size = 512
-
- # Issue discards to a logical volumes's underlying physical volume(s) when
- # the logical volume is no longer using the physical volumes' space (e.g.
- # lvremove, lvreduce, etc). Discards inform the storage that a region is
- # no longer in use. 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 set
- # to 1, discards will only be issued if both the storage and kernel provide
- # support.
- # 1 enables; 0 disables.
- issue_discards = 0
-}
-
-# This section allows you to configure the way in which LVM selects
-# free space for its Logical Volumes.
-#allocation {
-# 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.
-# Use the special tag "@*" as a wildcard to match any PV tag.
-#
-# 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" ]
-# cling_tag_list = [ "@*" ]
-#
-# 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. Set this to 0 to revert to the previous
-# algorithm.
-#
-# maximise_cling = 1
-#
-# Set to 1 to guarantee that mirror logs will always be placed on
-# different PVs from the mirror images. This was the default
-# until version 2.02.85.
-#
-# mirror_logs_require_separate_pvs = 0
-#
-# Set to 1 to guarantee that thin pool metadata will always
-# be placed on different PVs from the pool data.
-#
-# thin_pool_metadata_require_separate_pvs = 0
-#}
-
-# This section that allows you to configure the nature of the
-# information that LVM2 reports.
-log {
-
- # Controls the messages sent to stdout or stderr.
- # There are three levels of verbosity, 3 being the most verbose.
- verbose = 0
-
- # Should we send log messages through syslog?
- # 1 is yes; 0 is no.
- syslog = 1
-
- # Should we log error and debug messages to a file?
- # By default there is no log file.
- #file = "/var/log/lvm2.log"
-
- # Should we overwrite the log file each time the program is run?
- # By default we append.
- overwrite = 0
-
- # What level of log messages should we send to the log file and/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
-
- # Format of output messages
- # Whether or not (1 or 0) to indent messages according to their severity
- indent = 1
-
- # Whether or not (1 or 0) to display the command name on each line output
- command_names = 0
-
- # A prefix to use before the message text (but after the command name,
- # if selected). Default is two spaces, so you can see/grep the severity
- # of each message.
- prefix = " "
-
- # To make the messages look similar to the original LVM tools use:
- # indent = 0
- # command_names = 1
- # prefix = " -- "
-
- # Set this if you want log messages during activation.
- # Don't use this in low memory situations (can deadlock).
- # activation = 0
-}
-
-# Configuration of metadata backups and archiving. In LVM2 when we
-# talk about a 'backup' we mean making a copy of the metadata for the
-# *current* system. The 'archive' contains old metadata configurations.
-# Backups are stored in a human readeable text format.
-backup {
-
- # Should we maintain a backup of the current metadata configuration ?
- # Use 1 for Yes; 0 for No.
- # Think very hard before turning this off!
- backup = 1
-
- # Where shall we keep it ?
- # Remember to back up this directory regularly!
- backup_dir = "/etc/lvm/backup"
-
- # Should we maintain an archive of old metadata configurations.
- # Use 1 for Yes; 0 for No.
- # On by default. Think very hard before turning this off.
- archive = 1
-
- # Where should archived files go ?
- # Remember to back up this directory regularly!
- archive_dir = "/etc/lvm/archive"
-
- # What is the minimum number of archive files you wish to keep ?
- retain_min = 10
-
- # What is the minimum time you wish to keep an archive file for ?
- retain_days = 30
-}
-
-# Settings for the running LVM2 in shell (readline) mode.
-shell {
-
- # Number of lines of history to store in ~/.lvm_history
- history_size = 100
-}
-
-
-# Miscellaneous global LVM2 settings
-global {
-
- # The file creation mask for any files and directories created.
- # Interpreted as octal if the first digit is zero.
- umask = 077
-
- # Allow other users to read the files
- #umask = 022
-
- # Enabling test mode means that no changes to the on disk metadata
- # will be made. Equivalent to having the -t option on every
- # command. Defaults to off.
- test = 0
-
- # Default value for --units argument
- units = "h"
-
- # Since version 2.02.54, the tools distinguish between powers of
- # 1024 bytes (e.g. KiB, MiB, GiB) and powers of 1000 bytes (e.g.
- # KB, MB, GB).
- # If you have scripts that depend on the old behaviour, set this to 0
- # temporarily until you update them.
- si_unit_consistency = 1
-
- # Whether or not to communicate with the kernel device-mapper.
- # Set to 0 if you want to use the tools to manipulate LVM metadata
- # without activating any logical volumes.
- # If the device-mapper kernel driver is not present in your kernel
- # setting this to 0 should suppress the error messages.
- activation = 1
-
- # If we can't communicate with device-mapper, should we try running
- # the LVM1 tools?
- # This option only applies to 2.4 kernels and is provided to help you
- # switch between device-mapper kernels and LVM1 kernels.
- # The LVM1 tools need to be installed with .lvm1 suffices
- # e.g. vgscan.lvm1 and they will stop working after you start using
- # the new lvm2 on-disk metadata format.
- # The default value is set when the tools are built.
- # fallback_to_lvm1 = 0
-
- # The default metadata format that commands should use - "lvm1" or "lvm2".
- # The command line override is -M1 or -M2.
- # Defaults to "lvm2".
- # format = "lvm2"
-
- # Location of proc filesystem
- proc = "/proc"
-
- # Type of locking to use. Defaults to local file-based locking (1).
- # Turn locking off by setting to 0 (dangerous: risks metadata corruption
- # if LVM2 commands get run concurrently).
- # Type 2 uses the external shared library locking_library.
- # Type 3 uses built-in clustered locking.
- # Type 4 uses read-only locking which forbids any operations that might
- # change metadata.
- locking_type = 1
-
- # Set to 0 to fail when a lock request cannot be satisfied immediately.
- wait_for_locks = 1
-
- # If using external locking (type 2) and initialisation fails,
- # with this set to 1 an attempt will be made to use the built-in
- # clustered locking.
- # If you are using a customised locking_library you should set this to 0.
- fallback_to_clustered_locking = 1
-
- # If an attempt to initialise type 2 or type 3 locking failed, perhaps
- # because cluster components such as clvmd are not running, with this set
- # to 1 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
-
- # 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 = "/run/lock/lvm"
-
- # Whenever 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.
- # NB. This option only affects locking_type = 1 viz. local file-based
- # locking.
- prioritise_write_locks = 1
-
- # Other entries can go here to allow you to load shared libraries
- # e.g. if support for LVM1 metadata was compiled as a shared library use
- # format_libraries = "liblvm2format1.so"
- # Full pathnames can be given.
-
- # Search this directory first for shared libraries.
- # library_dir = "/lib/lvm2"
-
- # The external locking library to load if locking_type is set to 2.
- # locking_library = "liblvm2clusterlock.so"
-
- # 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
-
- # Check whether CRC is matching when parsed VG is used multiple times.
- # This is useful to catch unexpected internal cached volume group
- # structure modification. Please only enable for debugging.
- detect_internal_vg_cache_corruption = 0
-
- # If set to 1, no operations that change on-disk metadata will be 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
-
- # 'mirror_segtype_default' defines which segtype will be used when the
- # shorthand '-m' option is used for mirroring. The possible options are:
- #
- # "mirror" - The original RAID1 implementation provided by LVM2/DM. It is
- # characterized by a flexible log solution (core, disk, mirrored)
- # and by the necessity to block I/O while reconfiguring in the
- # event of a failure. Snapshots of this type of RAID1 can be
- # problematic.
- #
- # "raid1" - This implementation leverages MD's 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 in the kernel in the event of a failure.
- #
- # Specify the '--type <mirror|raid1>' option to override this default
- # setting.
- mirror_segtype_default = "mirror"
-
- # 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.
- # Set to 1 to reinstate the previous format.
- #
- # lvdisplay_shows_full_device_path = 0
-
- # Whether to use (trust) a running instance of lvmetad. If this is set to
- # 0, all commands fall back to the usual scanning mechanisms. When set to 1
- # *and* when lvmetad is running (it is not auto-started), the volume group
- # metadata and PV state flags are obtained from the lvmetad instance and no
- # scanning is done by the individual commands. In a setup with lvmetad,
- # lvmetad udev rules *must* be set up for LVM to work correctly. Without
- # proper udev rules, all changes in block device configuration will be
- # *ignored* until a manual 'vgscan' is performed.
- use_lvmetad = 0
-}
-
-activation {
- # Set to 1 to perform internal checks on the operations issued to
- # libdevmapper. 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
-
- # Set to 0 to disable udev synchronisation (if compiled into the binaries).
- # Processes will not wait for notification from udev.
- # They will continue irrespective of any possible udev processing
- # in the background. You should only use this if udev is not running
- # or has rules that ignore the devices LVM2 creates.
- # The command line argument --nodevsync takes precedence over this setting.
- # If set to 1 when udev is not running, and there are LVM2 processes
- # waiting for udev, run 'dmsetup udevcomplete_all' manually to wake them up.
- udev_sync = 1
-
- # Set to 0 to disable the udev rules installed by LVM2 (if built with
- # --enable-udev_rules). LVM2 will then manage the /dev nodes and symlinks
- # for active logical volumes directly itself.
- # N.B. Manual intervention may be required if this setting is changed
- # while any logical volumes are active.
- udev_rules = 1
-
- # Set to 1 for LVM2 to verify operations performed by udev. This turns on
- # additional checks (and if necessary, repairs) on entries in the device
- # directory after udev has completed processing its events.
- # Useful for diagnosing problems with LVM2/udev interactions.
- verify_udev_operations = 0
-
- # If set to 1 and if deactivation of an LV fails, perhaps because
- # a process run from a quick udev rule temporarily opened the device,
- # retry the operation for a few seconds before failing.
- retry_deactivation = 1
-
- # How to fill in missing stripes if activating an incomplete volume.
- # 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 to in place of missing stripes.
- # But note that using anything other than "error" with mirrored
- # or snapshotted volumes is likely to result in data corruption.
- missing_stripe_filler = "error"
-
- # The linear target is an optimised version of the striped target
- # that only handles a single stripe. Set this to 0 to disable this
- # optimisation and always use the striped target.
- use_linear_target = 1
-
- # How much stack (in KB) to reserve for use while devices suspended
- # Prior to version 2.02.89 this used to be set to 256KB
- reserved_stack = 64
-
- # How much memory (in KB) to reserve for use while devices suspended
- reserved_memory = 8192
-
- # Nice value used while devices suspended
- process_priority = -18
-
- # If volume_list is defined, each LV is only activated if there is a
- # match against the list.
- # "vgname" and "vgname/lvname" are matched exactly.
- # "@tag" matches any tag set in the LV or VG.
- # "@*" matches if any tag defined on the host is also set in the LV or VG
- #
- # volume_list = [ "vg1", "vg2/lvol1", "@tag1", "@*" ]
-
- # If read_only_volume_list is defined, each LV that is to be activated
- # is checked against the list, and if it matches, it as activated
- # in read-only mode. (This overrides '--permission rw' stored in the
- # metadata.)
- # "vgname" and "vgname/lvname" are matched exactly.
- # "@tag" matches any tag set in the LV or VG.
- # "@*" matches if any tag defined on the host is also set in the LV or VG
- #
- # read_only_volume_list = [ "vg1", "vg2/lvol1", "@tag1", "@*" ]
-
- # Size (in KB) of each copy operation when mirroring
- mirror_region_size = 512
-
- # Setting to use when there is no readahead value stored in the metadata.
- #
- # "none" - Disable readahead.
- # "auto" - Use default value chosen by kernel.
- readahead = "auto"
-
- # 'raid_fault_policy' defines how a device failure in a RAID logical
- # volume is handled. This includes logical volumes that have the following
- # segment types: raid1, raid4, raid5*, and raid6*.
- #
- # In the event of a failure, the following policies will determine what
- # actions are performed during the automated response to failures (when
- # dmeventd is monitoring the RAID logical volume) and when 'lvconvert' is
- # called manually with the options '--repair' and '--use-policies'.
- #
- # "warn" - Use the system log to warn the user that a device in the RAID
- # logical volume 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 logical volume 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"
-
- # 'mirror_image_fault_policy' and 'mirror_log_fault_policy' define
- # how a device failure affecting a mirror (of "mirror" segment type) is
- # handled. A mirror is composed of mirror images (copies) and a log.
- # A disk log ensures that a mirror does not need to be re-synced
- # (all copies made the same) every time a machine reboots or crashes.
- #
- # In the event of a failure, the specified policy will be used to determine
- # what happens. This applies to automatic repairs (when the mirror is being
- # monitored by dmeventd) and to manual lvconvert --repair when
- # --use-policies is given.
- #
- # "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 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_log_fault_policy = "allocate"
- mirror_image_fault_policy = "remove"
-
- # 'snapshot_autoextend_threshold' and 'snapshot_autoextend_percent' define
- # how to handle automatic snapshot extension. The former defines when the
- # snapshot should be extended: when its space usage exceeds this many
- # percent. The latter defines how much extra space should be allocated for
- # the snapshot, in percent of its current size.
- #
- # For example, if you set snapshot_autoextend_threshold to 70 and
- # snapshot_autoextend_percent to 20, whenever a snapshot exceeds 70% usage,
- # it will be extended by another 20%. For a 1G snapshot, using up 700M will
- # trigger a resize to 1.2G. When the usage exceeds 840M, the snapshot will
- # be extended to 1.44G, and so on.
- #
- # Setting snapshot_autoextend_threshold to 100 disables automatic
- # extensions. The minimum value is 50 (A setting below 50 will be treated
- # as 50).
-
- snapshot_autoextend_threshold = 100
- snapshot_autoextend_percent = 20
-
- # 'thin_pool_autoextend_threshold' and 'thin_pool_autoextend_percent' define
- # how to handle automatic pool extension. The former defines when the
- # pool should be extended: when its space usage exceeds this many
- # percent. The latter defines how much extra space should be allocated for
- # the pool, in percent of its current size.
- #
- # For example, if you set thin_pool_autoextend_threshold to 70 and
- # thin_pool_autoextend_percent to 20, whenever a pool exceeds 70% usage,
- # it will be extended by another 20%. For a 1G pool, using up 700M will
- # trigger a resize to 1.2G. When the usage exceeds 840M, the pool will
- # be extended to 1.44G, and so on.
- #
- # Setting thin_pool_autoextend_threshold to 100 disables automatic
- # extensions. The minimum value is 50 (A setting below 50 will be treated
- # as 50).
-
- thin_pool_autoextend_threshold = 100
- thin_pool_autoextend_percent = 20
-
- # Full path of the utility called to check that a thin metadata device
- # is in a state that allows it to be used.
- # Each time a thin pool needs to be activated, this utility is executed.
- # The activation will only proceed if the utility has an exit status of 0.
- # Set to "" to skip this check. (Not recommended.)
- # The thin tools are available as part of the device-mapper-persistent-data
- # package from https://github.com/jthornber/thin-provisioning-tools.
- #
- thin_check_executable = "/sbin/thin_check -q"
-
- # While activating devices, I/O to devices being (re)configured is
- # suspended, and as a precaution against deadlocks, LVM2 needs to pin
- # any memory it is using so it is not paged out. Groups of pages that
- # are known not to be accessed during activation need not be pinned
- # into memory. Each string listed in this setting is compared against
- # each line in /proc/self/maps, and the pages corresponding to any
- # 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.
- # mlock_filter = [ "locale/locale-archive", "gconv/gconv-modules.cache" ]
-
- # Set to 1 to revert to the default behaviour prior to version 2.02.62
- # which used mlockall() to pin the whole process's memory while activating
- # devices.
- use_mlockall = 0
-
- # Monitoring is enabled by default when activating logical volumes.
- # Set to 0 to disable monitoring or use the --ignoremonitoring option.
- monitoring = 0
-
- # 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. The default is 15 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 the
- # operation is complete.
- polling_interval = 15
-}
-
-
-####################
-# Advanced section #
-####################
-
-# Metadata settings
-#
-# metadata {
- # Default number of copies of metadata to hold on each PV. 0, 1 or 2.
- # You might want to override it from the command line with 0
- # when running pvcreate on new PVs which are to be added to large VGs.
-
- # pvmetadatacopies = 1
-
- # Default 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 default value of 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'.
-
- # vgmetadatacopies = 0
-
- # Approximate default size of on-disk metadata areas in sectors.
- # You should increase this if you have large volume groups or
- # you want to retain a large on-disk history of your metadata changes.
-
- # pvmetadatasize = 255
-
- # List of directories holding live copies of text format metadata.
- # These directories must not be on logical volumes!
- # It's possible to use LVM2 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).
-
- # dirs = [ "/etc/lvm/metadata", "/mnt/disk2/lvm/metadata2" ]
-#}
-
-# Event daemon
-#
-dmeventd {
- # mirror_library is the library used 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"
-
- # snapshot_library is the library used when monitoring a snapshot device.
- #
- # "libdevmapper-event-lvm2snapshot.so" monitors the filling of
- # snapshots and emits a warning through syslog when the use of
- # the snapshot exceeds 80%. The warning is repeated when 85%, 90% and
- # 95% of the snapshot is filled.
-
- snapshot_library = "libdevmapper-event-lvm2snapshot.so"
-
- # thin_library is the library used when monitoring a thin device.
- #
- # "libdevmapper-event-lvm2thin.so" monitors the filling of
- # pool and emits a warning through syslog when the use of
- # the pool exceeds 80%. The warning is repeated when 85%, 90% and
- # 95% of the pool is filled.
-
- thin_library = "libdevmapper-event-lvm2thin.so"
-
- # Full path of the dmeventd binary.
- #
- # executable = "/sbin/dmeventd"
-}
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