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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 ]
[ --driverloaded y|n ]
[ --lockopt String ]
[ --longhelp ]
[ --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 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.
--atomic
Makes a pvmove operation atomic, ensuring that all affected
LVs are moved to the destination PV, or none are if the
operation is aborted.
-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.
-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
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.
-h|--help
Display help text.
-i|--interval Number
Report progress at regular intervals.
--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.
--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, 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.
-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.
-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.)
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.
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
interval. 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 temporary
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 temporary 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
specified 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 possible
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)
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 2018-02-02. (At that time,
the date of the most recent commit that was found in the repository
was 2018-02-01.) 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 2.02.178(2)-git (2017-12-18) PVMOVE(8)
Pages that refer to this page: 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), 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)
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