Provided by: lvm2_2.03.16-1ubuntu1_amd64 bug


       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.

           [ 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  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.  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.

              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.

              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
              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

              Display help text.

       -i|--interval Number
              Report progress at regular intervals.

       --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

              Display long help text.

       -n|--name String
              Move only the extents belonging to the named LV.

              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.

              Disable locking. Use  with  caution,  concurrent  commands  may  produce  incorrect

              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(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.

              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.

              Display version information.

              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  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.)


       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
       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
       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),

       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), lvmraid(7), lvmthin(7), lvmcache(7)