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445 lines
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445 lines
10 KiB
Plaintext
.TH VGSPLIT 8 "LVM TOOLS #VERSION#" "Red Hat, Inc."
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.SH NAME
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vgsplit - Move physical volumes into a new or existing volume group
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.
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.SH SYNOPSIS
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\fBvgsplit\fP \fIoption_args\fP \fIposition_args\fP
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.br
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[ \fIoption_args\fP ]
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.br
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.SH DESCRIPTION
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vgsplit moves one or more PVs from a source VG (the first VG arg) to a
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destination VG (the second VG arg). The PV(s) to move are named after the
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source and destination VGs, or an LV is named, in which case the PVs
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underlying the LV are moved.
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If the destination VG does not exist, a new VG is created (command options
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can be used to specify properties of the new VG, also see
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\fBvgcreate\fP(8).)
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LVs cannot be split between VGs; each LV must be entirely on the PVs in
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the source or destination VG.
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vgsplit can only move complete PVs. (See \fBpvmove\fP(8) for moving part
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of a PV.)
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.SH USAGE
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Split a VG by specified PVs.
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.br
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.P
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\fBvgsplit\fP \fIVG\fP \fIVG\fP \fIPV\fP ...
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.br
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.RS 4
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[ COMMON_OPTIONS ]
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.RE
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.br
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Split a VG by PVs in a specified LV.
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.br
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.P
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\fBvgsplit\fP \fB-n\fP|\fB--name\fP \fILV\fP \fIVG\fP \fIVG\fP
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.br
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.RS 4
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[ COMMON_OPTIONS ]
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.RE
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.br
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Common options for command:
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.
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.RS 4
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.ad l
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[ \fB-A\fP|\fB--autobackup\fP \fBy\fP|\fBn\fP ]
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.ad b
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.br
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.ad l
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[ \fB-l\fP|\fB--maxlogicalvolumes\fP \fINumber\fP ]
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.ad b
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.br
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.ad l
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[ \fB-p\fP|\fB--maxphysicalvolumes\fP \fINumber\fP ]
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.ad b
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.br
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.ad l
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[ \fB-M\fP|\fB--metadatatype\fP \fBlvm2\fP ]
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.ad b
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.br
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.ad l
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[ \fB--alloc\fP
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.nh
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\fBcontiguous\fP|\:\fBcling\fP|\:\fBcling_by_tags\fP|\:\fBnormal\fP|\:\fBanywhere\fP|\:\fBinherit\fP
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.hy
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]
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.ad b
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.br
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.ad l
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[ \fB--[vg]metadatacopies\fP \fBall\fP|\fBunmanaged\fP|\fINumber\fP ]
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.ad b
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.RE
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Common options for lvm:
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.
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.RS 4
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.ad l
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[ \fB-d\fP|\fB--debug\fP ]
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.ad b
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.br
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.ad l
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[ \fB-h\fP|\fB--help\fP ]
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.ad b
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.br
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.ad l
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[ \fB-q\fP|\fB--quiet\fP ]
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.ad b
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.br
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.ad l
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[ \fB-t\fP|\fB--test\fP ]
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.ad b
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.br
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.ad l
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[ \fB-v\fP|\fB--verbose\fP ]
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.ad b
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.br
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.ad l
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[ \fB-y\fP|\fB--yes\fP ]
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.ad b
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.br
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.ad l
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[ \fB--commandprofile\fP \fIString\fP ]
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.ad b
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.br
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.ad l
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[ \fB--config\fP \fIString\fP ]
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.ad b
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.br
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.ad l
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[ \fB--devices\fP \fIPV\fP ]
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.ad b
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.br
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.ad l
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[ \fB--devicesfile\fP \fIString\fP ]
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.ad b
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.br
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.ad l
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[ \fB--driverloaded\fP \fBy\fP|\fBn\fP ]
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.ad b
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.br
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.ad l
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[ \fB--lockopt\fP \fIString\fP ]
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.ad b
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.br
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.ad l
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[ \fB--longhelp\fP ]
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.ad b
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.br
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.ad l
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[ \fB--nolocking\fP ]
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.ad b
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.br
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.ad l
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[ \fB--profile\fP \fIString\fP ]
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.ad b
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.br
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.ad l
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[ \fB--version\fP ]
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.ad b
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.RE
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.SH OPTIONS
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.TP
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.ad l
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\fB--alloc\fP
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.nh
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\fBcontiguous\fP|\:\fBcling\fP|\:\fBcling_by_tags\fP|\:\fBnormal\fP|\:\fBanywhere\fP|\:\fBinherit\fP
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.hy
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.br
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.ad b
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Determines the allocation policy when a command needs to allocate
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Physical Extents (PEs) from the VG. Each VG and LV has an allocation policy
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which can be changed with vgchange/lvchange, or overridden on the
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command line.
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\fBnormal\fP applies common sense rules such as not placing parallel stripes
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on the same PV.
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\fBinherit\fP applies the VG policy to an LV.
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\fBcontiguous\fP requires new PEs be placed adjacent to existing PEs.
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\fBcling\fP places new PEs on the same PV as existing PEs in the same
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stripe of the LV.
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If there are sufficient PEs for an allocation, but normal does not
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use them, \fBanywhere\fP will use them even if it reduces performance,
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e.g. by placing two stripes on the same PV.
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Optional positional PV args on the command line can also be used to limit
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which PVs the command will use for allocation.
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See \fBlvm\fP(8) for more information about allocation.
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.TP
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.ad l
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\fB-A\fP|\fB--autobackup\fP \fBy\fP|\fBn\fP
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.br
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.ad b
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Specifies if metadata should be backed up automatically after a change.
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Enabling this is strongly advised! See \fBvgcfgbackup\fP(8) for more information.
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.TP
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.ad l
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\fB--commandprofile\fP \fIString\fP
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.br
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.ad b
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The command profile to use for command configuration.
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See \fBlvm.conf\fP(5) for more information about profiles.
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.TP
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.ad l
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\fB--config\fP \fIString\fP
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.br
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.ad b
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Config settings for the command. These override lvm.conf settings.
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The String arg uses the same format as lvm.conf,
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or may use section/field syntax.
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See \fBlvm.conf\fP(5) for more information about config.
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.TP
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.ad l
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\fB-d\fP|\fB--debug\fP ...
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.br
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.ad b
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Set debug level. Repeat from 1 to 6 times to increase the detail of
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messages sent to the log file and/or syslog (if configured).
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.TP
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.ad l
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\fB--devices\fP \fIPV\fP
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.br
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.ad b
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Devices that the command can use. This option can be repeated
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or accepts a comma separated list of devices. This overrides
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the devices file.
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.TP
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.ad l
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\fB--devicesfile\fP \fIString\fP
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.br
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.ad b
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A file listing devices that LVM should use.
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The file must exist in /etc/lvm/devices/ and is managed
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with the lvmdevices(8) command.
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This overrides the lvm.conf devices/devicesfile and
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devices/use_devicesfile settings.
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.TP
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.ad l
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\fB--driverloaded\fP \fBy\fP|\fBn\fP
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.br
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.ad b
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If set to no, the command will not attempt to use device-mapper.
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For testing and debugging.
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.TP
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.ad l
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\fB-h\fP|\fB--help\fP
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.br
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.ad b
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Display help text.
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.TP
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.ad l
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\fB--lockopt\fP \fIString\fP
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.br
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.ad b
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Used to pass options for special cases to lvmlockd.
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See \fBlvmlockd\fP(8) for more information.
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.TP
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.ad l
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\fB--longhelp\fP
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.br
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.ad b
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Display long help text.
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.TP
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.ad l
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\fB-l\fP|\fB--maxlogicalvolumes\fP \fINumber\fP
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.br
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.ad b
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Sets the maximum number of LVs allowed in a VG.
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.TP
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.ad l
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\fB-p\fP|\fB--maxphysicalvolumes\fP \fINumber\fP
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.br
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.ad b
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Sets the maximum number of PVs that can belong to the VG.
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The value 0 removes any limitation.
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For large numbers of PVs, also see options --pvmetadatacopies,
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and --vgmetadatacopies for improving performance.
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.TP
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.ad l
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\fB-M\fP|\fB--metadatatype\fP \fBlvm2\fP
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.br
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.ad b
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Specifies the type of on-disk metadata to use.
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\fBlvm2\fP (or just \fB2\fP) is the current, standard format.
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\fBlvm1\fP (or just \fB1\fP) is no longer used.
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.TP
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.ad l
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\fB-n\fP|\fB--name\fP \fIString\fP
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.br
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.ad b
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Move only PVs used by the named LV.
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.TP
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.ad l
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\fB--nolocking\fP
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.br
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.ad b
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Disable locking.
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.TP
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.ad l
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\fB--profile\fP \fIString\fP
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.br
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.ad b
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An alias for --commandprofile or --metadataprofile, depending
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on the command.
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.TP
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.ad l
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\fB-q\fP|\fB--quiet\fP ...
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.br
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.ad b
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Suppress output and log messages. Overrides --debug and --verbose.
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Repeat once to also suppress any prompts with answer 'no'.
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.TP
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.ad l
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\fB-t\fP|\fB--test\fP
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.br
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.ad b
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Run in test mode. Commands will not update metadata.
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This is implemented by disabling all metadata writing but nevertheless
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returning success to the calling function. This may lead to unusual
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error messages in multi-stage operations if a tool relies on reading
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back metadata it believes has changed but hasn't.
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.TP
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.ad l
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\fB-v\fP|\fB--verbose\fP ...
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.br
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.ad b
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Set verbose level. Repeat from 1 to 4 times to increase the detail
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of messages sent to stdout and stderr.
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.TP
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.ad l
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\fB--version\fP
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.br
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.ad b
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Display version information.
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.TP
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.ad l
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\fB--[vg]metadatacopies\fP \fBall\fP|\fBunmanaged\fP|\fINumber\fP
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.br
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.ad b
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Number of copies of the VG metadata that are kept.
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VG metadata is kept in VG metadata areas on PVs in the VG,
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i.e. reserved space at the start and/or end of the PVs.
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Keeping a copy of the VG metadata on every PV can reduce performance
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in VGs containing a large number of PVs.
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When this number is set to a non-zero value, LVM will automatically
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choose PVs on which to store metadata, using the metadataignore flags
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on PVs to achieve the specified number.
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The number can also be replaced with special string values:
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\fBunmanaged\fP causes LVM to not automatically manage the PV
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metadataignore flags.
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\fBall\fP causes LVM to first clear the metadataignore flags on
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all PVs, and then to become unmanaged.
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.TP
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.ad l
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\fB-y\fP|\fB--yes\fP
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.br
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.ad b
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Do not prompt for confirmation interactively but always assume the
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answer yes. Use with extreme caution.
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(For automatic no, see -qq.)
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.SH VARIABLES
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.TP
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\fIVG\fP
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.br
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Volume Group name. See \fBlvm\fP(8) for valid names.
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.TP
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\fIPV\fP
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.br
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Physical Volume name, a device path under /dev.
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For commands managing physical extents, a PV positional arg
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generally accepts a suffix indicating a range (or multiple ranges)
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of physical extents (PEs). When the first PE is omitted, it defaults
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to the start of the device, and when the last PE is omitted it defaults to end.
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Start and end range (inclusive): \fIPV\fP[\fB:\fP\fIPE\fP\fB-\fP\fIPE\fP]...
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Start and length range (counting from 0): \fIPV\fP[\fB:\fP\fIPE\fP\fB+\fP\fIPE\fP]...
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.TP
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\fIString\fP
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.br
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See the option description for information about the string content.
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.TP
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\fISize\fP[UNIT]
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.br
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Size is an input number that accepts an optional unit.
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Input units are always treated as base two values, regardless of
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capitalization, e.g. 'k' and 'K' both refer to 1024.
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The default input unit is specified by letter, followed by |UNIT.
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UNIT represents other possible input units: \fBbBsSkKmMgGtTpPeE\fP.
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b|B is bytes, s|S is sectors of 512 bytes, k|K is KiB,
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m|M is MiB, g|G is GiB, t|T is TiB, p|P is PiB, e|E is EiB.
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(This should not be confused with the output control --units, where
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capital letters mean multiple of 1000.)
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.SH ENVIRONMENT VARIABLES
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See \fBlvm\fP(8) for information about environment variables used by lvm.
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For example, LVM_VG_NAME can generally be substituted for a required VG parameter.
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.SH SEE ALSO
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.nh
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.ad l
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.BR lvm (8),
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.BR lvm.conf (5),
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.BR lvmconfig (8),
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.BR lvmdevices (8),
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.BR pvchange (8),
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.BR pvck (8),
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.BR pvcreate (8),
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.BR pvdisplay (8),
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.BR pvmove (8),
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.BR pvremove (8),
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.BR pvresize (8),
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.BR pvs (8),
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.BR pvscan (8),
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.BR vgcfgbackup (8),
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.BR vgcfgrestore (8),
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.BR vgchange (8),
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.BR vgck (8),
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.BR vgcreate (8),
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.BR vgconvert (8),
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.BR vgdisplay (8),
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.BR vgexport (8),
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.BR vgextend (8),
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.BR vgimport (8),
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.BR vgimportclone (8),
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.BR vgimportdevices (8),
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.BR vgmerge (8),
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.BR vgmknodes (8),
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.BR vgreduce (8),
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.BR vgremove (8),
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.BR vgrename (8),
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.BR vgs (8),
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.BR vgscan (8),
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.BR vgsplit (8),
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.BR lvcreate (8),
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.BR lvchange (8),
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.BR lvconvert (8),
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.BR lvdisplay (8),
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.BR lvextend (8),
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.BR lvreduce (8),
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.BR lvremove (8),
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.BR lvrename (8),
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.BR lvresize (8),
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.BR lvs (8),
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.BR lvscan (8),
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.BR lvm-fullreport (8),
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.BR lvm-lvpoll (8),
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.BR lvm2-activation-generator (8),
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.BR blkdeactivate (8),
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.BR lvmdump (8),
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.BR dmeventd (8),
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.BR lvmpolld (8),
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.BR lvmlockd (8),
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.BR lvmlockctl (8),
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.BR cmirrord (8),
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.BR lvmdbusd (8),
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.BR lvmsystemid (7),
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.BR lvmreport (7),
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.BR lvmraid (7),
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.BR lvmthin (7),
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.BR lvmcache (7)
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