VGSPLIT(8) - man - phpman

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



NAME
       vgsplit - Move physical volumes into a new or existing volume group

SYNOPSIS
       vgsplit option_args position_args
           [ option_args ]

DESCRIPTION
       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  desti‐
       nation VG.

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

USAGE
       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 ]
           [    --[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 ]
           [    --driverloaded y|n ]
           [    --lockopt String ]
           [    --longhelp ]
           [    --nolocking ]
           [    --profile String ]
           [    --version ]

OPTIONS
       --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 allo‐
              cation.

       -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 infor‐
              mation 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 de‐
              bugging.

       -h|--help
              Display help text.

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

       --longhelp
              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 --vg‐
              metadatacopies for improving performance.

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

       -n|--name String
              Move only PVs used by the named LV.

       --nolocking
              Disable locking.

       --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'.

       -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 read‐
              ing 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.

       --[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.  Keep‐
              ing 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 number.  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 become
              unmanaged.

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

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

       PV
              Physical  Volume  name,  a device path under /dev.  For commands managing physical ex‐
              tents, 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 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.)

ENVIRONMENT VARIABLES
       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
       lvm(8) lvm.conf(5) lvmconfig(8)

       pvchange(8)  pvck(8)  pvcreate(8)  pvdisplay(8) pvmove(8) pvremove(8) pvresize(8) pvs(8) pvs‐‐
       can(8)

       vgcfgbackup(8) vgcfgrestore(8) vgchange(8) vgck(8) vgcreate(8) vgconvert(8) vgdisplay(8)  vg‐‐
       export(8)  vgextend(8) vgimport(8) vgimportclone(8) vgmerge(8) vgmknodes(8) vgreduce(8) vgre‐‐
       move(8) vgrename(8) vgs(8) vgscan(8) vgsplit(8)

       lvcreate(8) lvchange(8) lvconvert(8) lvdisplay(8) lvextend(8) lvreduce(8)  lvremove(8)  lvre‐‐
       name(8) lvresize(8) lvs(8) lvscan(8)

       lvm-fullreport(8) lvm-lvpoll(8) lvm2-activation-generator(8) blkdeactivate(8) lvmdump(8)

       dmeventd(8) lvmpolld(8) lvmlockd(8) lvmlockctl(8) cmirrord(8) lvmdbusd(8)

       lvmsystemid(7) lvmreport(7) lvmraid(7) lvmthin(7) lvmcache(7)



Red Hat, Inc.                     LVM TOOLS 2.03.11(2) (2021-01-08)                       VGSPLIT(8)