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713 lines
17 KiB
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713 lines
17 KiB
Plaintext
.TH LVEXTEND 8 "LVM TOOLS #VERSION#" "Red Hat, Inc."
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.SH NAME
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lvextend - Add space to a logical volume
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.
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.SH SYNOPSIS
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\fBlvextend\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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[ \fIposition_args\fP ]
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.br
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.P
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.ad l
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\fB--alloc\fP \fBcontiguous\fP|\fBcling\fP|\fBcling_by_tags\fP|\fBnormal\fP|\fBanywhere\fP|\fBinherit\fP
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.ad b
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.br
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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--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-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--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-l\fP|\fB--extents\fP [\fB+\fP]\fINumber\fP[PERCENT]
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.ad b
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.br
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.ad l
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\fB-f\fP|\fB--force\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--longhelp\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--mirrors\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-n\fP|\fB--nofsck\fP
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.ad b
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.br
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.ad l
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\fB--nosync\fP
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.ad b
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.br
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.ad l
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\fB--noudevsync\fP
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.ad b
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.br
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.ad l
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\fB--poolmetadatasize\fP [\fB+\fP]\fISize\fP[m|UNIT]
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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-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--reportformat\fP \fBbasic\fP|\fBjson\fP
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.ad b
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.br
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.ad l
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\fB-r\fP|\fB--resizefs\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--size\fP [\fB+\fP]\fISize\fP[m|UNIT]
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.ad b
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.br
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.ad l
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\fB-i\fP|\fB--stripes\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-I\fP|\fB--stripesize\fP \fISize\fP[k|UNIT]
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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--type\fP \fBlinear\fP|\fBstriped\fP|\fBsnapshot\fP|\fBmirror\fP|\fBraid\fP|\fBthin\fP|\fBcache\fP|\fBthin-pool\fP|\fBcache-pool\fP
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.ad b
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.br
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.ad l
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\fB--usepolicies\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--version\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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.SH DESCRIPTION
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lvextend extends the size of an LV. This requires allocating logical
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extents from the VG's free physical extents. If the extension adds a new
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LV segment, the new segment will use the existing segment type of the LV.
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Extending a copy-on-write snapshot LV adds space for COW blocks.
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Use \fBlvconvert\fP(8) to change the number of data images in a RAID or
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mirrored LV.
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In the usage section below, \fB--size\fP \fISize\fP can be replaced
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with \fB--extents\fP \fINumber\fP. See both descriptions
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the options section.
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.SH USAGE
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Extend an LV by a specified size.
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.br
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.P
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\fBlvextend\fP \fB-L\fP|\fB--size\fP [\fB+\fP]\fISize\fP[m|UNIT] \fILV\fP
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.br
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.RS 4
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.ad l
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[ \fB-l\fP|\fB--extents\fP [\fB+\fP]\fINumber\fP[PERCENT] ]
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.ad b
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.br
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.ad l
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[ \fB-r\fP|\fB--resizefs\fP ]
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.ad b
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.br
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.ad l
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[ \fB-i\fP|\fB--stripes\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-I\fP|\fB--stripesize\fP \fISize\fP[k|UNIT] ]
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.ad b
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.br
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.ad l
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[ \fB--poolmetadatasize\fP [\fB+\fP]\fISize\fP[m|UNIT] ]
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.ad b
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.br
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[ COMMON_OPTIONS ]
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.RE
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.br
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.RS 4
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[ \fIPV\fP ... ]
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.RE
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-
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Extend an LV by specified PV extents.
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.br
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.P
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\fBlvextend\fP \fILV\fP \fIPV\fP ...
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.br
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.RS 4
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.ad l
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[ \fB-r\fP|\fB--resizefs\fP ]
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.ad b
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.br
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.ad l
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[ \fB-i\fP|\fB--stripes\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-I\fP|\fB--stripesize\fP \fISize\fP[k|UNIT] ]
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.ad b
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.br
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[ COMMON_OPTIONS ]
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.RE
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.br
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-
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Extend a pool metadata SubLV by a specified size.
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.br
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.P
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\fBlvextend\fP \fB--poolmetadatasize\fP [\fB+\fP]\fISize\fP[m|UNIT] \fILV\fP\fI_thinpool\fP
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.br
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.RS 4
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.ad l
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[ \fB-i\fP|\fB--stripes\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-I\fP|\fB--stripesize\fP \fISize\fP[k|UNIT] ]
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.ad b
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.br
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[ COMMON_OPTIONS ]
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.RE
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.br
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.RS 4
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[ \fIPV\fP ... ]
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.RE
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-
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Extend an LV according to a predefined policy.
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.br
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.P
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\fBlvextend\fP \fB--usepolicies\fP \fILV\fP\fI_snapshot_thinpool\fP
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.br
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.RS 4
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.ad l
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[ \fB-r\fP|\fB--resizefs\fP ]
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.ad b
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.br
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[ COMMON_OPTIONS ]
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.RE
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.br
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.RS 4
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[ \fIPV\fP ... ]
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.RE
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-
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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-f\fP|\fB--force\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--mirrors\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-n\fP|\fB--nofsck\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 \fBcontiguous\fP|\fBcling\fP|\fBcling_by_tags\fP|\fBnormal\fP|\fBanywhere\fP|\fBinherit\fP ]
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.ad b
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.br
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.ad l
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[ \fB--nosync\fP ]
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.ad b
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.br
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.ad l
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[ \fB--noudevsync\fP ]
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.ad b
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.br
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.ad l
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[ \fB--reportformat\fP \fBbasic\fP|\fBjson\fP ]
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.ad b
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.br
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.ad l
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[ \fB--type\fP \fBlinear\fP|\fBstriped\fP|\fBsnapshot\fP|\fBmirror\fP|\fBraid\fP|\fBthin\fP|\fBcache\fP|\fBthin-pool\fP|\fBcache-pool\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--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--longhelp\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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.HP
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.ad l
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\fB--alloc\fP \fBcontiguous\fP|\fBcling\fP|\fBcling_by_tags\fP|\fBnormal\fP|\fBanywhere\fP|\fBinherit\fP
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.br
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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 overriden 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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.ad b
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.HP
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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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Specifies if metadata should be backed up automatically after a change.
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Enabling this is strongly advised! See vgcfgbackup(8) for more information.
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.ad b
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.HP
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.ad l
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\fB--commandprofile\fP \fIString\fP
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.br
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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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.ad b
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.HP
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.ad l
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\fB--config\fP \fIString\fP
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.br
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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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.ad b
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.HP
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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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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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.ad b
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.HP
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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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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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.ad b
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.HP
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.ad l
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\fB-l\fP|\fB--extents\fP [\fB+\fP]\fINumber\fP[PERCENT]
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.br
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Specifies the new size of the LV in logical extents.
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The --size and --extents options are alternate methods of specifying size.
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The total number of physical extents used will be
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greater when redundant data is needed for RAID levels.
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An alternate syntax allows the size to be determined indirectly
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as a percentage of the size of a related VG, LV, or set of PVs. The
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suffix \fB%VG\fP denotes the total size of the VG, the suffix \fB%FREE\fP
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the remaining free space in the VG, and the suffix \fB%PVS\fP the free
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space in the specified PVs. For a snapshot, the size
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can be expressed as a percentage of the total size of the origin LV
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with the suffix \fB%ORIGIN\fP (\fB100%ORIGIN\fP provides space for
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the whole origin).
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When expressed as a percentage, the size defines an upper limit for the
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number of logical extents in the new LV. The precise number of logical
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extents in the new LV is not determined until the command has completed.
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When the plus \fB+\fP or minus \fB-\fP prefix is used,
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the value is not an absolute size, but is relative and added or subtracted
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from the current size.
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.ad b
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.HP
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.ad l
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\fB-f\fP|\fB--force\fP ...
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.br
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Override various checks, confirmations and protections.
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Use with extreme caution.
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.ad b
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.HP
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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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Display help text.
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.ad b
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.HP
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.ad l
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\fB--longhelp\fP
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.br
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Display long help text.
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.ad b
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.HP
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.ad l
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\fB-m\fP|\fB--mirrors\fP \fINumber\fP
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.br
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Not used.
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.ad b
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.HP
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.ad l
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\fB-n\fP|\fB--nofsck\fP
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.br
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Do not perform fsck before resizing filesystem when filesystem
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requires it. You may need to use --force to proceed with
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this option.
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.ad b
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.HP
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.ad l
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\fB--nosync\fP
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.br
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Causes the creation of mirror, raid1, raid4, raid5 and raid10 to skip the
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initial synchronization. In case of mirror, raid1 and raid10, any data
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written afterwards will be mirrored, but the original contents will not be
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copied. In case of raid4 and raid5, no parity blocks will be written,
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though any data written afterwards will cause parity blocks to be stored.
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This is useful for skipping a potentially long and resource intensive initial
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sync of an empty mirror/raid1/raid4/raid5 and raid10 LV.
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This option is not valid for raid6, because raid6 relies on proper parity
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(P and Q Syndromes) being created during initial synchronization in order
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to reconstruct proper user date in case of device failures.
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raid0 and raid0_meta do not provide any data copies or parity support
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and thus do not support initial synchronization.
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.ad b
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.HP
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.ad l
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\fB--noudevsync\fP
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.br
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Disables udev synchronisation. The process will not wait for notification
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from udev. It will continue irrespective of any possible udev processing
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in the background. Only use this if udev is not running or has rules that
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ignore the devices LVM creates.
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.ad b
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.HP
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.ad l
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\fB--poolmetadatasize\fP [\fB+\fP]\fISize\fP[m|UNIT]
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.br
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Specifies the new size of the pool metadata LV.
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The plus prefix \fB+\fP can be used, in which case
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the value is added to the current size.
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.ad b
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.HP
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.ad l
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\fB--profile\fP \fIString\fP
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.br
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An alias for --commandprofile or --metadataprofile, depending
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on the command.
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.ad b
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.HP
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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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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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.ad b
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.HP
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.ad l
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\fB--reportformat\fP \fBbasic\fP|\fBjson\fP
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.br
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Overrides current output format for reports which is defined globally by
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the report/output_format setting in lvm.conf.
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\fBbasic\fP is the original format with columns and rows.
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If there is more than one report per command, each report is prefixed
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with the report name for identification. \fBjson\fP produces report
|
|
output in JSON format. See \fBlvmreport\fP(7) for more information.
|
|
.ad b
|
|
.HP
|
|
.ad l
|
|
\fB-r\fP|\fB--resizefs\fP
|
|
.br
|
|
Resize underlying filesystem together with the LV using fsadm(8).
|
|
.ad b
|
|
.HP
|
|
.ad l
|
|
\fB-L\fP|\fB--size\fP [\fB+\fP]\fISize\fP[m|UNIT]
|
|
.br
|
|
Specifies the new size of the LV.
|
|
The --size and --extents options are alternate methods of specifying size.
|
|
The total number of physical extents used will be
|
|
greater when redundant data is needed for RAID levels.
|
|
When the plus \fB+\fP or minus \fB-\fP prefix is used,
|
|
the value is not an absolute size, but is relative and added or subtracted
|
|
from the current size.
|
|
.ad b
|
|
.HP
|
|
.ad l
|
|
\fB-i\fP|\fB--stripes\fP \fINumber\fP
|
|
.br
|
|
Specifies the number of stripes in a striped LV. This is the number of
|
|
PVs (devices) that a striped LV is spread across. Data that
|
|
appears sequential in the LV is spread across multiple devices in units of
|
|
the stripe size (see --stripesize). This does not change existing
|
|
allocated space, but only applies to space being allocated by the command.
|
|
When creating a RAID 4/5/6 LV, this number does not include the extra
|
|
devices that are required for parity. The largest number depends on
|
|
the RAID type (raid0: 64, raid10: 32, raid4/5: 63, raid6: 62), and
|
|
when unspecified, the default depends on the RAID type
|
|
(raid0: 2, raid10: 2, raid4/5: 3, raid6: 5.)
|
|
To stripe a new raid LV across all PVs by default,
|
|
see lvm.conf allocation/raid_stripe_all_devices.
|
|
.ad b
|
|
.HP
|
|
.ad l
|
|
\fB-I\fP|\fB--stripesize\fP \fISize\fP[k|UNIT]
|
|
.br
|
|
The amount of data that is written to one device before
|
|
moving to the next in a striped LV.
|
|
.ad b
|
|
.HP
|
|
.ad l
|
|
\fB-t\fP|\fB--test\fP
|
|
.br
|
|
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.
|
|
.ad b
|
|
.HP
|
|
.ad l
|
|
\fB--type\fP \fBlinear\fP|\fBstriped\fP|\fBsnapshot\fP|\fBmirror\fP|\fBraid\fP|\fBthin\fP|\fBcache\fP|\fBthin-pool\fP|\fBcache-pool\fP
|
|
.br
|
|
The LV type, also known as "segment type" or "segtype".
|
|
See usage descriptions for the specific ways to use these types.
|
|
For more information about redundancy and performance (\fBraid\fP<N>, \fBmirror\fP, \fBstriped\fP, \fBlinear\fP) see \fBlvmraid\fP(7).
|
|
For thin provisioning (\fBthin\fP, \fBthin-pool\fP) see \fBlvmthin\fP(7).
|
|
For performance caching (\fBcache\fP, \fBcache-pool\fP) see \fBlvmcache\fP(7).
|
|
For copy-on-write snapshots (\fBsnapshot\fP) see usage definitions.
|
|
Several commands omit an explicit type option because the type
|
|
is inferred from other options or shortcuts
|
|
(e.g. --stripes, --mirrors, --snapshot, --virtualsize, --thin, --cache).
|
|
Use inferred types with care because it can lead to unexpected results.
|
|
.ad b
|
|
.HP
|
|
.ad l
|
|
\fB--usepolicies\fP
|
|
.br
|
|
Perform an operation according to the policy configured in lvm.conf
|
|
or a profile.
|
|
.ad b
|
|
.HP
|
|
.ad l
|
|
\fB-v\fP|\fB--verbose\fP ...
|
|
.br
|
|
Set verbose level. Repeat from 1 to 4 times to increase the detail
|
|
of messages sent to stdout and stderr.
|
|
.ad b
|
|
.HP
|
|
.ad l
|
|
\fB--version\fP
|
|
.br
|
|
Display version information.
|
|
.ad b
|
|
.HP
|
|
.ad l
|
|
\fB-y\fP|\fB--yes\fP
|
|
.br
|
|
Do not prompt for confirmation interactively but always assume the
|
|
answer yes. Use with extreme caution.
|
|
(For automatic no, see -qq.)
|
|
.ad b
|
|
.SH VARIABLES
|
|
.HP
|
|
\fILV\fP
|
|
.br
|
|
Logical Volume name. See \fBlvm\fP(8) for valid names.
|
|
An LV positional arg generally includes the VG name and LV name, e.g. VG/LV.
|
|
LV followed by _<type> indicates that an LV of the
|
|
given type is required. (raid represents raid<N> type)
|
|
.HP
|
|
\fIPV\fP
|
|
.br
|
|
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): \fIPV\fP[\fB:\fP\fIPE\fP\fB-\fP\fIPE\fP]...
|
|
Start and length range (counting from 0): \fIPV\fP[\fB:\fP\fIPE\fP\fB+\fP\fIPE\fP]...
|
|
.HP
|
|
\fIString\fP
|
|
.br
|
|
See the option description for information about the string content.
|
|
.HP
|
|
\fISize\fP[UNIT]
|
|
.br
|
|
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: \fBbBsSkKmMgGtTpPeE\fP.
|
|
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.)
|
|
.SH ENVIRONMENT VARIABLES
|
|
See \fBlvm\fP(8) for information about environment variables used by lvm.
|
|
For example, LVM_VG_NAME can generally be substituted for a required VG parameter.
|
|
.SH EXAMPLES
|
|
Extend the size of an LV by 54MiB, using a specific PV.
|
|
.br
|
|
.B lvextend -L +54 vg01/lvol10 /dev/sdk3
|
|
|
|
Extend the size of an LV by the amount of free
|
|
space on PV /dev/sdk3. This is equivalent to specifying
|
|
"-l +100%PVS" on the command line.
|
|
.br
|
|
.B lvextend vg01/lvol01 /dev/sdk3
|
|
|
|
Extend an LV by 16MiB using specific physical extents.
|
|
.br
|
|
.B lvextend -L+16m vg01/lvol01 /dev/sda:8-9 /dev/sdb:8-9
|
|
.SH SEE ALSO
|
|
|
|
.BR lvm (8)
|
|
.BR lvm.conf (5)
|
|
.BR lvmconfig (8)
|
|
|
|
.BR pvchange (8)
|
|
.BR pvck (8)
|
|
.BR pvcreate (8)
|
|
.BR pvdisplay (8)
|
|
.BR pvmove (8)
|
|
.BR pvremove (8)
|
|
.BR pvresize (8)
|
|
.BR pvs (8)
|
|
.BR pvscan (8)
|
|
|
|
.BR vgcfgbackup (8)
|
|
.BR vgcfgrestore (8)
|
|
.BR vgchange (8)
|
|
.BR vgck (8)
|
|
.BR vgcreate (8)
|
|
.BR vgconvert (8)
|
|
.BR vgdisplay (8)
|
|
.BR vgexport (8)
|
|
.BR vgextend (8)
|
|
.BR vgimport (8)
|
|
.BR vgimportclone (8)
|
|
.BR vgmerge (8)
|
|
.BR vgmknodes (8)
|
|
.BR vgreduce (8)
|
|
.BR vgremove (8)
|
|
.BR vgrename (8)
|
|
.BR vgs (8)
|
|
.BR vgscan (8)
|
|
.BR vgsplit (8)
|
|
|
|
.BR lvcreate (8)
|
|
.BR lvchange (8)
|
|
.BR lvconvert (8)
|
|
.BR lvdisplay (8)
|
|
.BR lvextend (8)
|
|
.BR lvreduce (8)
|
|
.BR lvremove (8)
|
|
.BR lvrename (8)
|
|
.BR lvresize (8)
|
|
.BR lvs (8)
|
|
.BR lvscan (8)
|
|
|
|
.BR lvm2-activation-generator (8)
|
|
.BR blkdeactivate (8)
|
|
.BR lvmdump (8)
|
|
|
|
.BR dmeventd (8)
|
|
.BR lvmetad (8)
|
|
.BR lvmpolld (8)
|
|
.BR lvmlockd (8)
|
|
.BR lvmlockctl (8)
|
|
.BR clvmd (8)
|
|
.BR cmirrord (8)
|
|
.BR lvmdbusd (8)
|
|
|
|
.BR lvmsystemid (7)
|
|
.BR lvmreport (7)
|
|
.BR lvmraid (7)
|
|
.BR lvmthin (7)
|
|
.BR lvmcache (7)
|