vgsplit(8) — Linux manual page


VGSPLIT(8)               System Manager's Manual              VGSPLIT(8)

NAME         top

       vgsplit — Move physical volumes into a new or existing volume

SYNOPSIS         top

       vgsplit option_args position_args
           [ option_args ]

DESCRIPTION         top

       vgsplit moves one or more PVs from a source VG (the first VG arg)
       to a destination VG (the second VG arg).  The PV(s) to move are
       named after the source and destination VGs, or an LV is named, in
       which case the PVs underlying the LV are moved.

       If the destination VG does not exist, a new VG is created
       (command options can be used to specify properties of the new VG,
       also see vgcreate(8)).

       LVs cannot be split between VGs; each LV must be entirely on the
       PVs in the source or destination VG.

       vgsplit can only move complete PVs. (See pvmove(8) for moving
       part of a PV.)

USAGE         top

       Split a VG by specified PVs.

       vgsplit VG VG PV ...
           [ COMMON_OPTIONS ]

       Split a VG by PVs in a specified LV.

       vgsplit -n|--name LV VG VG
           [ COMMON_OPTIONS ]

       Common options for command:
           [ -A|--autobackup y|n ]
           [ -l|--maxlogicalvolumes Number ]
           [ -p|--maxphysicalvolumes Number ]
           [ -M|--metadatatype lvm2 ]
           [    --alloc contiguous|cling|cling_by_tags|normal|anywhere|
           inherit ]
           [    --poolmetadataspare y|n ]
           [    --[vg]metadatacopies all|unmanaged|Number ]

       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 ]

OPTIONS         top

       --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 par‐
              allel stripes on the same PV.  inherit applies the VG pol‐
              icy to an LV.  contiguous requires new PEs be placed adja‐
              cent 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 per‐
              formance, e.g. by placing two stripes on the same PV.  Op‐
              tional positional PV args on the command line can also  be
              used  to  limit which PVs the command will use for alloca‐
              tion.  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(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

       --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.

              Display help text.

       --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.
              debug: record full command debugging.

       --lockopt String
              Used  to  pass options for special cases to lvmlockd.  See
              lvmlockd(8) for more information.

              Display long help text.

       -l|--maxlogicalvolumes Number
              Sets the maximum number of LVs allowed in a VG.

       -p|--maxphysicalvolumes Number
              Sets the maximum number of PVs that can belong to the  VG.
              The  value 0 removes any limitation.  For large numbers of
              PVs, also see options --pvmetadatacopies, and --vgmetadat‐
              acopies for improving performance.

       -M|--metadatatype lvm2
              Specifies the type of on-disk metadata to use.   lvm2  (or
              just 2) is the current, standard format.  lvm1 (or just 1)
              is no longer used.

       -n|--name String
              Move only PVs used by 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.

       --poolmetadataspare y|n
              Enable or disable the automatic creation and management of
              a spare pool metadata LV in the VG. A spare metadata LV is
              reserved space that can be used when repairing a pool.

       --profile String
              An alias for --commandprofile  or  --metadataprofile,  de‐
              pending on the command.

       -q|--quiet ...
              Suppress  output  and  log messages. Overrides --debug and
              --verbose.  Repeat once to also suppress any prompts  with
              answer 'no'.

              Run in test mode. Commands will not update metadata.  This
              is  implemented by disabling all metadata writing but nev‐
              ertheless returning success to the calling function.  This
              may  lead  to unusual error messages in multi-stage opera‐
              tions if a tool relies on reading  back  metadata  it  be‐
              lieves 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.

       --[vg]metadatacopies all|unmanaged|Number
              Number of copies of the VG metadata  that  are  kept.   VG
              metadata  is  kept  in VG metadata areas on PVs in the VG,
              i.e. reserved space at the start and/or end  of  the  PVs.
              Keeping  a  copy of the VG metadata on every PV can reduce
              performance in VGs containing a large number of PVs.  When
              this number is set to a non-zero value, LVM will automati‐
              cally choose PVs on which to  store  metadata,  using  the
              metadataignore  flags on PVs to achieve the specified num‐
              ber.  The number can also be replaced with special  string
              values:  unmanaged  causes LVM to not automatically manage
              the PV metadataignore flags.   all  causes  LVM  to  first
              clear the metadataignore flags on all PVs, and then to be‐
              come unmanaged.

              Do  not  prompt  for confirmation interactively but always
              assume the answer yes. Use with extreme caution.  (For au‐
              tomatic no, see -qq.)

VARIABLES         top

       VG     Volume Group name.  See lvm(8) for valid names.

       PV     Physical Volume name, a device path under /dev.  For com‐
              mands managing physical extents, a PV positional arg gen‐
              erally 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, regard‐
              less of capitalization, e.g. 'k' and 'K' both refer to
              1024.  The default input unit is specified by letter, fol‐
              lowed 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 con‐
              trol --units, where capital letters mean multiple of


       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.

SEE ALSO         top

       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)

COLOPHON         top

       This page is part of the lvm2 (Logical Volume Manager 2) project.
       Information about the project can be found at 
       ⟨⟩.  If you have a bug report for
       this manual page, see ⟨⟩.
       This page was obtained from the project's upstream Git repository
       ⟨git://⟩ on 2024-06-14.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2024-06-11.)  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

Red Hat, Inc.     LVM TOOLS 2.03.25(2)-git (2024-05-16)       VGSPLIT(8)

Pages that refer to this page: lvmcache(7)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)