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peter@peter-Precision-WorkStation-T3500:~$ cat /etc/lvm/lvm.conf# 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/.*/" ]
# 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/.*/" ]
# Since "filter" is often overriden from command line, it is not suitable # for system-wide device filtering (udev rules, lvmetad). To hide devices # from LVM-specific udev processing and/or from lvmetad, you need to set # global_filter. The syntax is the same as for normal "filter" # above. Devices that fail the global_filter are not even opened by LVM.
# global_filter = []
# 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.) # N.B. If obtain_device_list_from_udev is set to 1 the list of # devices is instead obtained from udev and any existing .cache # file is removed. 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 = 1}
# 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
# Set to 1 to suppress all non-essential messages from stdout. # This has the same effect as -qq. # When this is set, 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
# 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 settingsglobal {
# 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. # # 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. # Ref: https://bugzilla.redhat.com/show_bug.cgi?id=817130#c10 # # "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. # This mirror implementation is not cluster-aware and cannot be # used in a shared (active/active) fashion in a cluster. # # 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 'pvscan --cache' is performed. # # If lvmetad has been running while use_lvmetad was 0, it MUST be stopped # before changing use_lvmetad to 1 and started again afterwards. use_lvmetad = 0
# 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 or after it is deactivated # 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 = "/usr/sbin/thin_check"
# String with options passed with thin_check command. By default, # option '-q' is for quiet output. thin_check_options = [ "-q" ]}
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 auto_activation_volume_list is defined, each LV that is to be # activated is checked against the list while using the autoactivation # option (--activate ay/-a ay), and if it matches, it is activated. # "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 # # auto_activation_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
# 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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