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NAME | SYNOPSIS | DESCRIPTION | USAGE | OPTIONS | VARIABLES | ENVIRONMENT VARIABLES | EXAMPLES | SEE ALSO | COLOPHON |
LVEXTEND(8) System Manager's Manual LVEXTEND(8)
lvextend - Add space to a logical volume
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
--driverloaded y|n
-l|--extents [+]Number[PERCENT]
-f|--force
-h|--help
--longhelp
-m|--mirrors Number
-n|--nofsck
--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|mirror|raid|thin|cache|thin-pool|cache-pool
--usepolicies
-v|--verbose
--version
-y|--yes
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.
Extend an LV by a specified size.
lvextend -L|--size [+]Size[m|UNIT] LV
[ -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.
lvextend LV PV ...
[ -r|--resizefs ]
[ -i|--stripes Number ]
[ -I|--stripesize Size[k|UNIT] ]
[ COMMON_OPTIONS ]
-
Extend a pool metadata SubLV by a specified size.
lvextend --poolmetadatasize [+]Size[m|UNIT] LV_thinpool
[ -i|--stripes Number ]
[ -I|--stripesize Size[k|UNIT] ]
[ COMMON_OPTIONS ]
[ PV ... ]
-
Extend an LV according to a predefined policy.
lvextend --usepolicies LV_snapshot_thinpool
[ -r|--resizefs ]
[ COMMON_OPTIONS ]
[ PV ... ]
-
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|mirror|raid|thin|cache|thin-pool|cache-pool
]
Common options for lvm:
[ -d|--debug ]
[ -h|--help ]
[ -q|--quiet ]
[ -t|--test ]
[ -v|--verbose ]
[ -y|--yes ]
[ --commandprofile String ]
[ --config String ]
[ --driverloaded y|n ]
[ --longhelp ]
[ --profile String ]
[ --version ]
--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 overriden 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
settings. The String arg uses the same format as lvm.conf, 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).
--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.
--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.
--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.
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 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|mirror|raid|thin|cache|thin-pool|cache-pool
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.
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). Use
inferred types with care because it can lead to unexpected
results.
--usepolicies
Perform an operation according to the policy configured in
lvm.conf 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.)
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. LV followed by _<type> indicates that an LV of
the given type is required. (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: bBsSkKmMgGtTpPeE.
b|B is bytes, s|S is sectors of 512 bytes, k|K is kilobytes,
m|M is megabytes, g|G is gigabytes, t|T is terabytes, p|P is
petabytes, e|E is exabytes. (This should not be confused with
the output control --units, where capital letters mean
multiple of 1000.)
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.
Extend the size of an LV by 54MiB, using a specific PV.
lvextend -L +54 vg01/lvol10 /dev/sdk3
Extend the size of an LV by the amount of free space on PV /dev/sdk3.
This is equivalent to specifying "-l +100%PVS" on the command line.
lvextend vg01/lvol01 /dev/sdk3
Extend an LV by 16MiB using specific physical extents.
lvextend -L+16m vg01/lvol01 /dev/sda:8-9 /dev/sdb:8-9
lvm(8) lvm.conf(5) lvmconfig(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) vgmerge(8) vgmknodes(8) vgreduce(8) vgremove(8)
vgrename(8) vgs(8) vgscan(8) vgsplit(8)
lvcreate(8) lvchange(8) lvconvert(8) lvdisplay(8) lvextend(8)
lvreduce(8) lvremove(8) lvrename(8) lvresize(8) lvs(8) lvscan(8)
lvm-fullreport(8) lvm-lvpoll(8) lvm2-activation-generator(8)
blkdeactivate(8) lvmdump(8)
dmeventd(8) lvmetad(8) lvmpolld(8) lvmlockd(8) lvmlockctl(8) clvmd(8)
cmirrord(8) lvmdbusd(8)
lvmsystemid(7) lvmreport(7) lvmraid(7) lvmthin(7) lvmcache(7)
This page is part of the lvm2 (Logical Volume Manager 2) project.
Information about the project can be found at
⟨http://www.sourceware.org/lvm2/⟩. If you have a bug report for this
manual page, send it to linux-lvm@redhat.com. This page was obtained
from the project's upstream Git repository
⟨git://sourceware.org/git/lvm2.git⟩ on 2017-07-05. If you discover
any rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page, or
you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
Red Hat, Inc. LVM TOOLS 2.02.173(2)-git (2017-06-28) LVEXTEND(8)
Pages that refer to this page: lvmcache(7), lvmthin(7), lvchange(8), lvconvert(8), lvcreate(8), lvdisplay(8), lvextend(8), lvm(8), lvmconfig(8), lvmdiskscan(8), lvm-fullreport(8), lvm-lvpoll(8), lvreduce(8), lvremove(8), lvrename(8), lvresize(8), lvs(8), lvscan(8), pvchange(8), pvck(8), pvcreate(8), pvdisplay(8), pvmove(8), pvremove(8), pvresize(8), pvs(8), pvscan(8), resize2fs(8), vgcfgbackup(8), vgcfgrestore(8), vgchange(8), vgck(8), vgconvert(8), vgcreate(8), vgdisplay(8), vgexport(8), vgextend(8), vgimport(8), vgimportclone(8), vgmerge(8), vgmknodes(8), vgreduce(8), vgremove(8), vgrename(8), vgs(8), vgscan(8), vgsplit(8)