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 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 ]
[ --lockopt String ]
[ --longhelp ]
[ --profile String ]
[ --version ]
OPTIONS
--alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit
Determines the allocation policy when a command needs to allo-
cate 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 infor-
mation 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 set-
tings. 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.
--lockopt String
Used to pass options for special cases to lvmlockd. See lvm-
lockd(8) for more information.
--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 histori-
cal 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 --ver-
bose. 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 meta-
data, using the metadataignore flags on PVs to achieve the spec-
ified 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 con-
tent.
Size[UNIT]
Size is an input number that accepts an optional unit. Input
units are always treated as base two values, regardless of capi-
talization, e.g. 'k' and 'K' both refer to 1024. The default
input unit is specified by letter, followed by |UNIT. UNIT rep-
resents 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.
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) pvscan(8)
vgcfgbackup(8) vgcfgrestore(8) vgchange(8) vgck(8) vgcreate(8) vgcon-
vert(8) vgdisplay(8) vgexport(8) vgextend(8) vgimport(8) vgimport-
clone(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) lvre-
duce(8) lvremove(8) lvrename(8) lvresize(8) lvs(8) lvscan(8)
lvm-fullreport(8) lvm-lvpoll(8) lvm2-activation-generator(8) blkdeacti-
vate(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)
Red Hat, Inc. LVM TOOLS 2.02.187(2)-RHEL7 (2020-03-24) VGSPLIT(8)
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