Ubuntu Manpage: vgsplit - Move physical volumes into a new or existing volume group

Provided by: lvm2_2.02.176-4.1ubuntu3.18.04.3_amd64

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 to a destination VG. The PVs can be
       specified explicitly or implicitly by naming an LV, in which case on 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

       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 ]
           [ -c|--clustered y|n ]
           [ -l|--maxlogicalvolumes Number ]
           [ -p|--maxphysicalvolumes Number ]
           [ -M|--metadatatype lvm2|lvm1 ]
           [    --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 ]
           [    --longhelp ]
           [    --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 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.

-c|--clustered y|n
Specifies the clustered property of the new VG.

--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.

--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
--vgmetadatacopies for improving performance.

-M|--metadatatype lvm2|lvm1
Specifies the type of on-disk metadata to use. lvm2 (or just 2) is the current,
standard format. lvm1 (or just 1) is a historical format that can be used for
accessing old data.

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

--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 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.

--[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 automatically 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
              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.)

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.