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NAME | SYNOPSIS | DESCRIPTION | USAGE | OPTIONS | VARIABLES | ENVIRONMENT VARIABLES | NOTES | EXAMPLES | SEE ALSO | COLOPHON |
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PVMOVE(8) System Manager's Manual PVMOVE(8)
pvmove — Move extents from one physical volume to another
pvmove position_args
[ option_args ]
[ position_args ]
pvmove moves the allocated physical extents (PEs) on a source PV
to one or more destination PVs. You can optionally specify a
source LV in which case only extents used by that LV will be moved
to free (or specified) extents on the destination PV. If no
destination PV is specified, the normal allocation rules for the
VG are used.
If pvmove is interrupted for any reason (e.g. the machine crashes)
then run pvmove again without any PV arguments to restart any
operations that were in progress from the last checkpoint.
Alternatively, use the abort option at any time to abort the
operation. The resulting location of LVs after an abort depends on
whether the atomic option was used.
More than one pvmove can run concurrently if they are moving data
from different source PVs, but additional pvmoves will ignore any
LVs already in the process of being changed, so some data might
not get moved.
Move PV extents.
pvmove PV
[ -A|--autobackup y|n ]
[ -n|--name LV ]
[ --alloc contiguous|cling|cling_by_tags|normal|anywhere|
inherit ]
[ --atomic ]
[ --noudevsync ]
[ --reportformat basic|json ]
[ COMMON_OPTIONS ]
[ PV ... ]
Continue or abort existing pvmove operations.
pvmove
[ COMMON_OPTIONS ]
Common options for command:
[ -b|--background ]
[ -i|--interval Number ]
[ --abort ]
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 ]
--abort
Abort any pvmove operations in progress. If a pvmove was
started with the --atomic option, then all LVs will remain
on the source PV. Otherwise, segments that have been moved
will remain on the destination PV, while unmoved segments
will remain on the source PV.
--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. nor‐
mal 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 ex‐
isting PEs in the same stripe of the LV. If there are suf‐
ficient PEs for an allocation, but normal does not use
them, anywhere will use them even if it reduces perfor‐
mance, e.g. by placing two stripes on the same PV. Option‐
al 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.
--atomic
Makes a pvmove operation atomic, ensuring that all affected
LVs are moved to the destination PV, or none are if the op‐
eration is aborted.
-A|--autobackup y|n
Specifies if metadata should be backed up automatically af‐
ter a change. Enabling this is strongly advised! See
vgcfgbackup(8) for more information.
-b|--background
If the operation requires polling, this option causes the
command to return before the operation is complete, and
polling is done in the background.
--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
Devices that the command can use. This option can be re‐
peated 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) de‐
vices/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.
-h|--help
Display help text.
-i|--interval Number
Report progress at regular intervals.
--journal String
Record information in the systemd journal. This informa‐
tion 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. de‐
bug: 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.
-n|--name String
Move only the extents belonging to the named LV.
--nohints
Do not use the hints file to locate devices for PVs. A com‐
mand may read more devices to find PVs when hints are not
used. The command will still perform standard hint file in‐
validation where appropriate.
--nolocking
Disable locking.
--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.
--profile String
An alias for --commandprofile or --metadataprofile, depend‐
ing 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 de‐
fined 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.
-t|--test
Run in test mode. Commands will not update metadata. This
is implemented by disabling all metadata writing but never‐
theless 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.
-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 as‐
sume the answer yes. Use with extreme caution. (For auto‐
matic no, see -qq.)
PV Physical Volume name, a device path under /dev. For com‐
mands managing physical extents, a PV positional arg gener‐
ally 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. In‐
put 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.)
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.
pvmove works as follows:
1. A temporary 'pvmove' LV is created to store details of all the
data movements required.
2. Every LV in the VG is searched for contiguous data that need
moving according to the command line arguments. For each piece of
data found, a new segment is added to the end of the pvmove LV.
This segment takes the form of a temporary mirror to copy the data
from the original location to a newly allocated location. The
original LV is updated to use the new temporary mirror segment in
the pvmove LV instead of accessing the data directly.
3. The VG metadata is updated on disk.
4. The first segment of the pvmove LV is activated and starts to
mirror the first part of the data. Only one segment is mirrored
at once as this is usually more efficient.
5. A daemon repeatedly checks progress at the specified time in‐
terval. When it detects that the first temporary mirror is in
sync, it breaks that mirror so that only the new location for that
data gets used and writes a checkpoint into the VG metadata on
disk. Then it activates the mirror for the next segment of the
pvmove LV.
6. When there are no more segments left to be mirrored, the tempo‐
rary LV is removed and the VG metadata is updated so that the LVs
reflect the new data locations.
Note that this new process cannot support the original LVM1 type
of on-disk metadata. Metadata can be converted using
vgconvert(8).
If the --atomic option is used, a slightly different approach is
used for the move. Again, a temporary 'pvmove' LV is created to
store the details of all the data movements required. This tempo‐
rary LV contains all the segments of the various LVs that need to
be moved. However, in this case, an identical LV is allocated
that contains the same number of segments and a mirror is created
to copy the contents from the first temporary LV to the second.
After a complete copy is made, the temporary LVs are removed,
leaving behind the segments on the destination PV. If an abort is
issued during the move, all LVs being moved will remain on the
source PV.
Move all physical extents that are used by simple LVs on the spec‐
ified PV to free physical extents elsewhere in the VG.
pvmove /dev/sdb1
Use a specific destination PV when moving physical extents.
pvmove /dev/sdb1 /dev/sdc1
Move extents belonging to a single LV.
pvmove -n lvol1 /dev/sdb1 /dev/sdc1
Rather than moving the contents of an entire device, it is possi‐
ble to move a range of physical extents, for example numbers 1000
to 1999 inclusive on the specified PV.
pvmove /dev/sdb1:1000-1999
A range of physical extents to move can be specified as
start+length. For example, starting from PE 1000. (Counting starts
from 0, so this refers to the 1001st to the 2000th PE inclusive.)
pvmove /dev/sdb1:1000+1000
Move a range of physical extents to a specific PV (which must have
sufficient free extents).
pvmove /dev/sdb1:1000-1999 /dev/sdc1
Move a range of physical extents to specific new extents on a new
PV.
pvmove /dev/sdb1:1000-1999 /dev/sdc1:0-999
If the source and destination are on the same disk, the anywhere
allocation policy is needed.
pvmove --alloc anywhere /dev/sdb1:1000-1999 /dev/sdb1:0-999
The part of a specific LV present within in a range of physical
extents can also be picked out and moved.
pvmove -n lvol1 /dev/sdb1:1000-1999 /dev/sdc1
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), lvextend(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), lvmcache(7), lvmraid(7), lvmthin(7),
lvmvdo(7), lvmautoactivation(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, see ⟨https://github.com/lvmteam/lvm2/issues⟩.
This page was obtained from the project's upstream Git repository
⟨git://sourceware.org/git/lvm2.git⟩ on 2025-02-02. (At that time,
the date of the most recent commit that was found in the
repository was 2025-01-31.) 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 2.03.31(2)-git (2025-01-14) PVMOVE(8)
Pages that refer to this page: lvchange(8), lvconvert(8), lvcreate(8), lvdisplay(8), lvextend(8), lvm(8), lvmconfig(8), lvmdevices(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), vgcfgbackup(8), vgcfgrestore(8), vgchange(8), vgck(8), vgconvert(8), vgcreate(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)
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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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