1LVRESIZE(8)                 System Manager's Manual                LVRESIZE(8)
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3
4

NAME

6       lvresize - Resize a logical volume
7

SYNOPSIS

9       lvresize option_args position_args
10           [ option_args ]
11           [ position_args ]
12
13           --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
14        -A|--autobackup y|n
15           --commandprofile String
16           --config String
17        -d|--debug
18           --driverloaded y|n
19        -l|--extents [+|-]Number[PERCENT]
20        -f|--force
21        -h|--help
22           --lockopt String
23           --longhelp
24        -n|--nofsck
25           --nolocking
26           --nosync
27           --noudevsync
28           --poolmetadatasize [+]Size[m|UNIT]
29           --profile String
30        -q|--quiet
31           --reportformat basic|json
32        -r|--resizefs
33        -L|--size [+|-]Size[m|UNIT]
34        -i|--stripes Number
35        -I|--stripesize Size[k|UNIT]
36        -t|--test
37           --type linear|striped|snapshot|mir‐
38       ror|raid|thin|cache|vdo|thin-pool|cache-pool|vdo-pool
39        -v|--verbose
40           --version
41        -y|--yes
42

DESCRIPTION

44       lvresize resizes an LV in the same way as lvextend  and  lvreduce.  See
45       lvextend(8) and lvreduce(8) for more information.
46
47       In  the usage section below, --size Size can be replaced with --extents
48       Number.  See both descriptions the options section.
49

USAGE

51       Resize an LV by a specified size.
52
53       lvresize -L|--size [+|-]Size[m|UNIT] LV
54           [ -l|--extents [+|-]Number[PERCENT] ]
55           [ -r|--resizefs ]
56           [    --poolmetadatasize [+]Size[m|UNIT] ]
57           [ COMMON_OPTIONS ]
58           [ PV ... ]
59       -
60
61       Resize an LV by specified PV extents.
62
63       lvresize LV PV ...
64           [ -r|--resizefs ]
65           [ COMMON_OPTIONS ]
66       -
67
68       Resize a pool metadata SubLV by a specified size.
69
70       lvresize --poolmetadatasize [+]Size[m|UNIT] LV_thinpool
71           [ COMMON_OPTIONS ]
72           [ PV ... ]
73       -
74
75       Common options for command:
76           [ -A|--autobackup y|n ]
77           [ -f|--force ]
78           [ -n|--nofsck ]
79           [ -i|--stripes Number ]
80           [ -I|--stripesize Size[k|UNIT] ]
81           [    --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
82           ]
83           [    --nosync ]
84           [    --noudevsync ]
85           [    --reportformat basic|json ]
86           [    --type linear|striped|snapshot|mir‐
87           ror|raid|thin|cache|vdo|thin-pool|cache-pool|vdo-pool ]
88
89       Common options for lvm:
90           [ -d|--debug ]
91           [ -h|--help ]
92           [ -q|--quiet ]
93           [ -t|--test ]
94           [ -v|--verbose ]
95           [ -y|--yes ]
96           [    --commandprofile String ]
97           [    --config String ]
98           [    --driverloaded y|n ]
99           [    --lockopt String ]
100           [    --longhelp ]
101           [    --nolocking ]
102           [    --profile String ]
103           [    --version ]
104

OPTIONS

106       --alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
107              Determines the allocation policy when a command needs to allo‐
108              cate Physical Extents (PEs) from the VG. Each VG and LV has an
109              allocation policy which can be changed with vgchange/lvchange,
110              or overriden on the command line.  normal applies common sense
111              rules such as not placing parallel stripes on the same PV.
112              inherit applies the VG policy to an LV.  contiguous requires new
113              PEs be placed adjacent to existing PEs.  cling places new PEs on
114              the same PV as existing PEs in the same stripe of the LV.  If
115              there are sufficient PEs for an allocation, but normal does not
116              use them, anywhere will use them even if it reduces performance,
117              e.g. by placing two stripes on the same PV.  Optional positional
118              PV args on the command line can also be used to limit which PVs
119              the command will use for allocation.  See lvm(8) for more infor‐
120              mation about allocation.
121
122       -A|--autobackup y|n
123              Specifies if metadata should be backed up automatically after a
124              change.  Enabling this is strongly advised! See vgcfgbackup(8)
125              for more information.
126
127       --commandprofile String
128              The command profile to use for command configuration.  See
129              lvm.conf(5) for more information about profiles.
130
131       --config String
132              Config settings for the command. These override lvm.conf set‐
133              tings.  The String arg uses the same format as lvm.conf, or may
134              use section/field syntax.  See lvm.conf(5) for more information
135              about config.
136
137       -d|--debug ...
138              Set debug level. Repeat from 1 to 6 times to increase the detail
139              of messages sent to the log file and/or syslog (if configured).
140
141       --driverloaded y|n
142              If set to no, the command will not attempt to use device-mapper.
143              For testing and debugging.
144
145       -l|--extents [+|-]Number[PERCENT]
146              Specifies the new size of the LV in logical extents.  The --size
147              and --extents options are alternate methods of specifying size.
148              The total number of physical extents used will be greater when
149              redundant data is needed for RAID levels.  An alternate syntax
150              allows the size to be determined indirectly as a percentage of
151              the size of a related VG, LV, or set of PVs. The suffix %VG
152              denotes the total size of the VG, the suffix %FREE the remaining
153              free space in the VG, and the suffix %PVS the free space in the
154              specified PVs.  For a snapshot, the size can be expressed as a
155              percentage of the total size of the origin LV with the suffix
156              %ORIGIN (100%ORIGIN provides space for the whole origin).  When
157              expressed as a percentage, the size defines an upper limit for
158              the number of logical extents in the new LV. The precise number
159              of logical extents in the new LV is not determined until the
160              command has completed.  When the plus + or minus - prefix is
161              used, the value is not an absolute size, but is relative and
162              added or subtracted from the current size.
163
164       -f|--force ...
165              Override various checks, confirmations and protections.  Use
166              with extreme caution.
167
168       -h|--help
169              Display help text.
170
171       --lockopt String
172              Used to pass options for special cases to lvmlockd.  See lvm‐
173              lockd(8) for more information.
174
175       --longhelp
176              Display long help text.
177
178       -n|--nofsck
179              Do not perform fsck before resizing filesystem when filesystem
180              requires it. You may need to use --force to proceed with this
181              option.
182
183       --nolocking
184              Disable locking.
185
186       --nosync
187              Causes the creation of mirror, raid1, raid4, raid5 and raid10 to
188              skip the initial synchronization. In case of mirror, raid1 and
189              raid10, any data written afterwards will be mirrored, but the
190              original contents will not be copied. In case of raid4 and
191              raid5, no parity blocks will be written, though any data written
192              afterwards will cause parity blocks to be stored.  This is use‐
193              ful for skipping a potentially long and resource intensive ini‐
194              tial sync of an empty mirror/raid1/raid4/raid5 and raid10 LV.
195              This option is not valid for raid6, because raid6 relies on
196              proper parity (P and Q Syndromes) being created during initial
197              synchronization in order to reconstruct proper user date in case
198              of device failures.  raid0 and raid0_meta do not provide any
199              data copies or parity support and thus do not support initial
200              synchronization.
201
202       --noudevsync
203              Disables udev synchronisation. The process will not wait for
204              notification from udev. It will continue irrespective of any
205              possible udev processing in the background. Only use this if
206              udev is not running or has rules that ignore the devices LVM
207              creates.
208
209       --poolmetadatasize [+]Size[m|UNIT]
210              Specifies the new size of the pool metadata LV.  The plus prefix
211              + can be used, in which case the value is added to the current
212              size.
213
214       --profile String
215              An alias for --commandprofile or --metadataprofile, depending on
216              the command.
217
218       -q|--quiet ...
219              Suppress output and log messages. Overrides --debug and --ver‐
220              bose.  Repeat once to also suppress any prompts with answer
221              'no'.
222
223       --reportformat basic|json
224              Overrides current output format for reports which is defined
225              globally by the report/output_format setting in lvm.conf.  basic
226              is the original format with columns and rows.  If there is more
227              than one report per command, each report is prefixed with the
228              report name for identification. json produces report output in
229              JSON format. See lvmreport(7) for more information.
230
231       -r|--resizefs
232              Resize underlying filesystem together with the LV using
233              fsadm(8).
234
235       -L|--size [+|-]Size[m|UNIT]
236              Specifies the new size of the LV.  The --size and --extents
237              options are alternate methods of specifying size.  The total
238              number of physical extents used will be greater when redundant
239              data is needed for RAID levels.  When the plus + or minus - pre‐
240              fix is used, the value is not an absolute size, but is relative
241              and added or subtracted from the current size.
242
243       -i|--stripes Number
244              Specifies the number of stripes in a striped LV. This is the
245              number of PVs (devices) that a striped LV is spread across. Data
246              that appears sequential in the LV is spread across multiple
247              devices in units of the stripe size (see --stripesize). This
248              does not change existing allocated space, but only applies to
249              space being allocated by the command.  When creating a RAID
250              4/5/6 LV, this number does not include the extra devices that
251              are required for parity. The largest number depends on the RAID
252              type (raid0: 64, raid10: 32, raid4/5: 63, raid6: 62), and when
253              unspecified, the default depends on the RAID type (raid0: 2,
254              raid10: 2, raid4/5: 3, raid6: 5.)  To stripe a new raid LV
255              across all PVs by default, see lvm.conf alloca‐
256              tion/raid_stripe_all_devices.
257
258       -I|--stripesize Size[k|UNIT]
259              The amount of data that is written to one device before moving
260              to the next in a striped LV.
261
262       -t|--test
263              Run in test mode. Commands will not update metadata.  This is
264              implemented by disabling all metadata writing but nevertheless
265              returning success to the calling function. This may lead to
266              unusual error messages in multi-stage operations if a tool
267              relies on reading back metadata it believes has changed but
268              hasn't.
269
270       --type linear|striped|snapshot|mir‐
271              ror|raid|thin|cache|vdo|thin-pool|cache-pool|vdo-pool
272              The LV type, also known as "segment type" or "segtype".  See
273              usage descriptions for the specific ways to use these types.
274              For more information about redundancy and performance (raid<N>,
275              mirror, striped, linear) see lvmraid(7).  For thin provisioning
276              (thin, thin-pool) see lvmthin(7).  For performance caching
277              (cache, cache-pool) see lvmcache(7).  For copy-on-write snap‐
278              shots (snapshot) see usage definitions.  For VDO (vdo) see
279              lvmvdo(7).  Several commands omit an explicit type option
280              because the type is inferred from other options or shortcuts
281              (e.g. --stripes, --mirrors, --snapshot, --virtualsize, --thin,
282              --cache, --vdo).  Use inferred types with care because it can
283              lead to unexpected results.
284
285       -v|--verbose ...
286              Set verbose level. Repeat from 1 to 4 times to increase the
287              detail of messages sent to stdout and stderr.
288
289       --version
290              Display version information.
291
292       -y|--yes
293              Do not prompt for confirmation interactively but always assume
294              the answer yes. Use with extreme caution.  (For automatic no,
295              see -qq.)
296

VARIABLES

298       LV
299              Logical  Volume  name.  See lvm(8) for valid names.  An LV posi‐
300              tional arg generally includes the VG  name  and  LV  name,  e.g.
301              VG/LV.  LV followed by _<type> indicates that an LV of the given
302              type is required. (raid represents raid<N> type)
303
304       PV
305              Physical Volume name, a device path under  /dev.   For  commands
306              managing physical extents, a PV positional arg generally accepts
307              a suffix indicating a range (or  multiple  ranges)  of  physical
308              extents  (PEs). When the first PE is omitted, it defaults to the
309              start of the device, and when the last PE is omitted it defaults
310              to  end.   Start and end range (inclusive): PV[:PE-PE]...  Start
311              and length range (counting from 0): PV[:PE+PE]...
312
313       String
314              See the option description for information about the string con‐
315              tent.
316
317       Size[UNIT]
318              Size  is  an  input number that accepts an optional unit.  Input
319              units are always treated as base two values, regardless of capi‐
320              talization,  e.g.  'k'  and 'K' both refer to 1024.  The default
321              input unit is specified by letter, followed by |UNIT.  UNIT rep‐
322              resents  other  possible  input units: bBsSkKmMgGtTpPeE.  b|B is
323              bytes, s|S is sectors of 512 bytes, k|K  is  kilobytes,  m|M  is
324              megabytes, g|G is gigabytes, t|T is terabytes, p|P is petabytes,
325              e|E is exabytes.  (This should not be confused with  the  output
326              control --units, where capital letters mean multiple of 1000.)
327

ENVIRONMENT VARIABLES

329       See  lvm(8)  for  information  about environment variables used by lvm.
330       For example, LVM_VG_NAME can generally be substituted for a required VG
331       parameter.
332

EXAMPLES

334       Extend an LV by 16MB using specific physical extents:
335       lvresize -L+16M vg1/lv1 /dev/sda:0-1 /dev/sdb:0-1
336

SEE ALSO

338       lvm(8) lvm.conf(5) lvmconfig(8)
339
340       pvchange(8)  pvck(8)  pvcreate(8)  pvdisplay(8)  pvmove(8)  pvremove(8)
341       pvresize(8) pvs(8) pvscan(8)
342
343       vgcfgbackup(8) vgcfgrestore(8) vgchange(8) vgck(8)  vgcreate(8)  vgcon‐
344       vert(8)  vgdisplay(8)  vgexport(8)  vgextend(8)  vgimport(8)  vgimport‐
345       clone(8) vgmerge(8) vgmknodes(8)  vgreduce(8)  vgremove(8)  vgrename(8)
346       vgs(8) vgscan(8) vgsplit(8)
347
348       lvcreate(8)  lvchange(8)  lvconvert(8)  lvdisplay(8)  lvextend(8) lvre‐
349       duce(8) lvremove(8) lvrename(8) lvresize(8) lvs(8) lvscan(8)
350
351       lvm-fullreport(8) lvm-lvpoll(8) lvm2-activation-generator(8) blkdeacti‐
352       vate(8) lvmdump(8)
353
354       dmeventd(8)  lvmpolld(8)  lvmlockd(8)  lvmlockctl(8)  cmirrord(8) lvmd‐
355       busd(8)
356
357       lvmsystemid(7) lvmreport(7) lvmraid(7) lvmthin(7) lvmcache(7)
358
359
360
361Red Hat, Inc.          LVM TOOLS 2.03.10(2) (2020-08-09)           LVRESIZE(8)
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