NAME
lvextend — Add space to a logical volumeSYNOPSIS
lvextend option_args position_args[ option_args ]
[ position_args ]
--alloc contiguous|cling|cling_by_tags|normal| anywhere| inherit
-A|--autobackup y|n
--commandprofile String
--config String
-d|--debug
--devices PV
--devicesfile String
--driverloaded y|n
-l|--extents [+]Number[PERCENT]
-f|--force
-h|--help
--journal String
--lockopt String
--longhelp
-m|--mirrors Number
-n|--nofsck
--nohints
--nolocking
--nosync
--noudevsync
--poolmetadatasize [+]Size[m|UNIT]
--profile String
-q|--quiet
--reportformat basic|json
-r|--resizefs
-L|--size [+]Size[m|UNIT]
-i|--stripes Number
-I|--stripesize Size[k|UNIT]
-t|--test
--type linear|striped|snapshot|raid|mirror| thin| thin-pool|vdo|vdo-pool|cache|cache-pool| writecache
--usepolicies
-v|--verbose
--version
-y|--yes
DESCRIPTION
lvextend extends the size of an LV. This requires allocating logical extents from the VG's free physical extents. If the extension adds a new LV segment, the new segment will use the existing segment type of the LV. Extending a copy-on-write snapshot LV adds space for COW blocks. Use lvconvert(8) to change the number of data images in a RAID or mirrored LV. In the usage section below, --size Size can be replaced with --extents Number. See both descriptions the options section.USAGE
Extend an LV by a specified size.[ -l|--extents
[+]Number[PERCENT] ]
[ -r|--resizefs ]
[ -i|--stripes Number ]
[ -I|--stripesize Size[k|UNIT] ]
[ --poolmetadatasize [+]Size[m|UNIT] ]
[ COMMON_OPTIONS ]
[ PV ... ]
—
Extend an LV by specified PV extents.
[ -r|--resizefs ]
[ -i|--stripes Number ]
[ -I|--stripesize Size[k|UNIT] ]
[ COMMON_OPTIONS ]
—
Extend a pool metadata SubLV by a specified size.
[ -i|--stripes Number ]
[ -I|--stripesize Size[k|UNIT] ]
[ COMMON_OPTIONS ]
[ PV ... ]
LV1 types: thinpool
—
Extend an LV according to a predefined policy.
[ -r|--resizefs ]
[ COMMON_OPTIONS ]
[ PV ... ]
LV1 types: snapshot thinpool
—
Common options for command:
[ -A|--autobackup
y|n ]
[ -f|--force ]
[ -m|--mirrors Number ]
[ -n|--nofsck ]
[ --alloc
contiguous|cling|cling_by_tags|normal|
anywhere| inherit ]
[ --nosync ]
[ --noudevsync ]
[ --reportformat basic|json ]
[ --type
linear|striped|snapshot|raid|mirror|
thin|
thin-pool|vdo|vdo-pool|cache|cache-pool|
writecache ]
Common options for lvm:
[ -d|--debug ]
[ -h|--help ]
[ -q|--quiet ]
[ -t|--test ]
[ -v|--verbose ]
[ -y|--yes ]
[ --commandprofile String ]
[ --config String ]
[ --devices PV ]
[ --devicesfile String ]
[ --driverloaded y|n ]
[ --journal String ]
[ --lockopt String ]
[ --longhelp ]
[ --nohints ]
[ --nolocking ]
[ --profile String ]
[ --version ]
OPTIONS
--alloc
contiguous|cling|cling_by_tags|normal|anywhere|inherit
Determines the allocation policy when a command needs to allocate Physical
Extents (PEs) from the VG. Each VG and LV has an allocation policy which can
be changed with vgchange/lvchange, or overridden on the command line.
normal applies common sense rules such as not placing parallel stripes
on the same PV. inherit applies the VG policy to an LV.
contiguous requires new PEs be placed adjacent to existing PEs.
cling places new PEs on the same PV as existing PEs in the same stripe
of the LV. If there are sufficient PEs for an allocation, but normal does not
use them, anywhere will use them even if it reduces performance, e.g.
by placing two stripes on the same PV. Optional positional PV args on the
command line can also be used to limit which PVs the command will use for
allocation. See lvm(8) for more information about allocation.
-A|--autobackup
y|n
Specifies if metadata should be backed up automatically after a change. Enabling
this is strongly advised! See vgcfgbackup(8) for more
information.
--commandprofile
String
The command profile to use for command configuration. See lvm.conf(5) for
more information about profiles.
--config
String
Config settings for the command. These override lvm.conf(5) settings. The
String arg uses the same format as lvm.conf(5), or may use
section/field syntax. See lvm.conf(5) for more information about
config.
-d|--debug
...
Set debug level. Repeat from 1 to 6 times to increase the detail of messages
sent to the log file and/or syslog (if configured).
--devices
PV
Restricts the devices that are visible and accessible to the command. Devices
not listed will appear to be missing. This option can be repeated, or accepts
a comma separated list of devices. This overrides the devices file.
--devicesfile
String
A file listing devices that LVM should use. The file must exist in
/etc/lvm/devices/ and is managed with the lvmdevices(8) command.
This overrides the lvm.conf(5) devices/devicesfile and
devices/use_devicesfile settings.
--driverloaded
y|n
If set to no, the command will not attempt to use device-mapper. For testing and
debugging.
-l|--extents
[ +]Number[PERCENT]
Specifies the new size of the LV in logical extents. The --size and --extents
options are alternate methods of specifying size. The total number of physical
extents used will be greater when redundant data is needed for RAID levels. An
alternate syntax allows the size to be determined indirectly as a percentage
of the size of a related VG, LV, or set of PVs. The suffix %VG denotes
the total size of the VG, the suffix %FREE the remaining free space in
the VG, and the suffix %PVS the free space in the specified PVs. For a
snapshot, the size can be expressed as a percentage of the total size of the
origin LV with the suffix %ORIGIN (100%ORIGIN provides space for
the whole origin). When expressed as a percentage, the size defines an upper
limit for the number of logical extents in the new LV. The precise number of
logical extents in the new LV is not determined until the command has
completed. When the plus + or minus - prefix is used, the value
is not an absolute size, but is relative and added or subtracted from the
current size.
-f|--force
...
Override various checks, confirmations and protections. Use with extreme
caution.
-h|--help
Display help text.
--journal
String
Record information in the systemd journal. This information is in addition to
information enabled by the lvm.conf log/journal setting. command: record
information about the command. output: record the default command output.
debug: record full command debugging.
--lockopt
String
Used to pass options for special cases to lvmlockd. See lvmlockd(8) for
more information.
--longhelp
Display long help text.
-m|--mirrors
Number
Not used.
-n|--nofsck
Do not perform fsck before resizing filesystem when filesystem requires it. You
may need to use --force to proceed with this option.
--nohints
Do not use the hints file to locate devices for PVs. A command may read more
devices to find PVs when hints are not used. The command will still perform
standard hint file invalidation where appropriate.
--nolocking
Disable locking. Use with caution, concurrent commands may produce incorrect
results.
--nosync
Causes the creation of mirror, raid1, raid4, raid5 and raid10 to skip the
initial synchronization. In case of mirror, raid1 and raid10, any data written
afterwards will be mirrored, but the original contents will not be copied. In
case of raid4 and raid5, no parity blocks will be written, though any data
written afterwards will cause parity blocks to be stored. This is useful for
skipping a potentially long and resource intensive initial sync of an empty
mirror/raid1/raid4/raid5 and raid10 LV. This option is not valid for raid6,
because raid6 relies on proper parity (P and Q Syndromes) being created during
initial synchronization in order to reconstruct proper user date in case of
device failures. raid0 and raid0_meta do not provide any data copies or parity
support and thus do not support initial synchronization.
--noudevsync
Disables udev synchronisation. The process will not wait for notification from
udev. It will 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.
--poolmetadatasize
[ +]Size[m|UNIT]
Specifies the new size of the pool metadata LV. The plus prefix + can be
used, in which case the value is added to the current size.
--profile
String
An alias for --commandprofile or --metadataprofile, depending on the
command.
-q|--quiet
...
Suppress output and log messages. Overrides --debug and --verbose. Repeat once
to also suppress any prompts with answer 'no'.
--reportformat
basic|json
Overrides current output format for reports which is defined globally by the
report/output_format setting in lvm.conf(5). basic is the
original format with columns and rows. If there is more than one report per
command, each report is prefixed with the report name for identification.
json produces report output in JSON format. See lvmreport(7) for
more information.
-r|--resizefs
Resize underlying filesystem together with the LV using fsadm(8).
-L|--size
[ +]Size[m|UNIT]
Specifies the new size of the LV. The --size and --extents options are alternate
methods of specifying size. The total number of physical extents used will be
greater when redundant data is needed for RAID levels. When the plus +
or minus - prefix is used, the value is not an absolute size, but is
relative and added or subtracted from the current size.
-i|--stripes
Number
Specifies the number of stripes in a striped LV. This is the number of PVs
(devices) that a striped LV is spread across. Data that appears sequential in
the LV is spread across multiple devices in units of the stripe size (see
--stripesize). This does not change existing allocated space, but only applies
to space being allocated by the command. When creating a RAID 4/5/6 LV, this
number does not include the extra devices that are required for parity. The
largest number depends on the RAID type (raid0: 64, raid10: 32, raid4/5: 63,
raid6: 62), and when unspecified, the default depends on the RAID type (raid0:
2, raid10: 2, raid4/5: 3, raid6: 5.) To stripe a new raid LV across all PVs by
default, see lvm.conf(5)
allocation/raid_stripe_all_devices.
-I|--stripesize
Size[k|UNIT]
The amount of data that is written to one device before moving to the next in a
striped LV.
-t|--test
Run in test mode. Commands will not update metadata. This is implemented by
disabling all metadata writing but nevertheless returning success to the
calling function. This may lead to unusual error messages in multi-stage
operations if a tool relies on reading back metadata it believes has changed
but hasn't.
--type
linear|striped|snapshot|raid|mirror|thin|thin-pool|vdo|vdo-pool|cache|cache-pool|writecache
The LV type, also known as "segment type" or "segtype". See
usage descriptions for the specific ways to use these types. For more
information about redundancy and performance ( raid<N>,
mirror, striped, linear) see lvmraid(7). For thin
provisioning ( thin, thin-pool) see lvmthin(7). For
performance caching ( cache, cache-pool) see lvmcache(7).
For copy-on-write snapshots ( snapshot) see usage definitions. For VDO
( vdo) see lvmvdo(7). Several commands omit an explicit type
option because the type is inferred from other options or shortcuts (e.g.
--stripes, --mirrors, --snapshot, --virtualsize, --thin, --cache, --vdo). Use
inferred types with care because it can lead to unexpected results.
--usepolicies
Perform an operation according to the policy configured in lvm.conf(5) or
a profile.
-v|--verbose
...
Set verbose level. Repeat from 1 to 4 times to increase the detail of messages
sent to stdout and stderr.
--version
Display version information.
-y|--yes
Do not prompt for confirmation interactively but always assume the answer yes.
Use with extreme caution. (For automatic no, see -qq.)
VARIABLES
- LV
- Logical Volume name. See lvm(8) for valid names. An LV positional arg generally includes the VG name and LV name, e.g. VG/LV. LV1 indicates the LV must have a specific type, where the accepted LV types are listed. (raid represents raid<N> type).
- PV
- Physical Volume name, a device path under /dev. For commands managing physical extents, a PV positional arg generally accepts a suffix indicating a range (or multiple ranges) of physical extents (PEs). When the first PE is omitted, it defaults to the start of the device, and when the last PE is omitted it defaults to end. Start and end range (inclusive): PV[:PE-PE]... Start and length range (counting from 0): PV[:PE+PE]...
- String
- See the option description for information about the string content.
- Size[UNIT]
- Size is an input number that accepts an optional unit. Input units are always treated as base two values, regardless of capitalization, e.g. 'k' and 'K' both refer to 1024. The default input unit is specified by letter, followed by |UNIT. UNIT represents other possible input units: b|B is bytes, s|S is sectors of 512 bytes, k|K is KiB, m|M is MiB, g|G is GiB, t|T is TiB, p|P is PiB, e|E is EiB. (This should not be confused with the output control --units, where capital letters mean multiple of 1000.)
ENVIRONMENT VARIABLES
See lvm(8) for information about environment variables used by lvm. For example, LVM_VG_NAME can generally be substituted for a required VG parameter.EXAMPLES
Extend the size of an LV by 54MiB, using a specific PV.SEE ALSO
lvm(8), lvm.conf(5), lvmconfig(8), lvmdevices(8), pvchange(8), pvck(8), pvcreate(8), pvdisplay(8), pvmove(8), pvremove(8), pvresize(8), pvs(8), pvscan(8), vgcfgbackup(8), vgcfgrestore(8), vgchange(8), vgck(8), vgcreate(8), vgconvert(8), vgdisplay(8), vgexport(8), vgextend(8), vgimport(8), vgimportclone(8), vgimportdevices(8), vgmerge(8), vgmknodes(8), vgreduce(8), vgremove(8), vgrename(8), vgs(8), vgscan(8), vgsplit(8), lvcreate(8), lvchange(8), lvconvert(8), lvdisplay(8), , lvreduce(8), lvremove(8), lvrename(8), lvresize(8), lvs(8), lvscan(8), lvm-fullreport(8), lvm-lvpoll(8), blkdeactivate(8), lvmdump(8), dmeventd(8), lvmpolld(8), lvmlockd(8), lvmlockctl(8), cmirrord(8), lvmdbusd(8), fsadm(8), lvmsystemid(7), lvmreport(7), lvmraid(7), lvmthin(7), lvmcache(7)LVM TOOLS 2.03.16(2) (2022-05-18) | Red Hat, Inc. |