mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-21 13:34:40 +03:00
014ba37cb1
While stripe size is twice the physical extent size, the original code will not reduce stripe size to maximum (physical extent size). Signed-off-by: Zhiqing Zhang <zhangzq.fnst@cn.fujitsu.com>
121 lines
5.1 KiB
Groff
121 lines
5.1 KiB
Groff
.TH LVRESIZE 8 "LVM TOOLS #VERSION#" "Sistina Software UK" \" -*- nroff -*-
|
|
.SH NAME
|
|
lvresize \- resize a logical volume
|
|
.SH SYNOPSIS
|
|
.B lvresize
|
|
.RB [ \-\-alloc " " \fIAllocationPolicy ]
|
|
.RB [ \-\-noudevsync ]
|
|
.RB [ \-i | \-\-stripes " " \fIStripes
|
|
.RB [ \-I | \-\-stripesize " " \fIStripeSize ]]
|
|
.RB {[ \-l | \-\-extents
|
|
.RI [ + | \- ] LogicalExtentsNumber [ % { VG | LV | PVS | FREE | ORIGIN "}] |"
|
|
.RB [ \-L | \-\-size
|
|
.RI [ + | \- ] LogicalVolumeSize [ bBsSkKmMgGtTpPeE ]}
|
|
.RB [ \-\-poolmetadatasize
|
|
.RI [ + ] MetadataVolumeSize [ bBsSkKmMgG ]
|
|
.RB [ \-f | \-\-force ]
|
|
.RB [ \-n | \-\-nofsck ]
|
|
.RB [ \-r | \-\-resizefs ]
|
|
.IR LogicalVolume { Name | Path }
|
|
.RI [ PhysicalVolumePath [ :PE [ -PE ]]...]
|
|
.SH DESCRIPTION
|
|
lvresize allows you to resize a logical volume.
|
|
Be careful when reducing a logical volume's size, because data in the reduced
|
|
part is lost!!!
|
|
You should therefore ensure that any filesystem on the volume is
|
|
shrunk first so that the extents that are to be removed are not in use.
|
|
Resizing snapshot logical volumes (see
|
|
.BR lvcreate (8)
|
|
for information about creating snapshots) is supported as well.
|
|
But to change the number of copies in a mirrored logical
|
|
volume use
|
|
.BR lvconvert (8).
|
|
.SH OPTIONS
|
|
See \fBlvm\fP(8) for common options.
|
|
.TP
|
|
.BR \-f ", " \-\-force
|
|
Force resize without prompting even when it may cause data loss.
|
|
.TP
|
|
.BR \-n ", " \-\-nofsck
|
|
Do not perform fsck before resizing filesystem when filesystem
|
|
requires it. You may need to use \fB--force\fR to proceed with
|
|
this option.
|
|
.TP
|
|
.BR \-r ", " \-\-resizefs
|
|
Resize underlying filesystem together with the logical volume using
|
|
\fBfsadm\fR(8).
|
|
.TP
|
|
.IR \fB\-l ", " \fB\-\-extents " [" + | - ] LogicalExtentsNumber [ % { VG | LV | PVS | FREE | ORIGIN }]
|
|
Change or set the logical volume size in units of logical extents.
|
|
With the \fI+\fP or \fI-\fP sign the value is added to or subtracted from the actual size
|
|
of the logical volume and without it, the value is taken as an absolute one.
|
|
The total number of physical extents affected will be
|
|
greater than this if, for example, the volume is mirrored.
|
|
The number can also be expressed as a percentage of the total space
|
|
in the Volume Group with the suffix \fI%VG\fP, relative to the existing
|
|
size of the Logical Volume with the suffix \fI%LV\fP, as a percentage of
|
|
the remaining free space of the PhysicalVolumes on the command line with the
|
|
suffix \fI%PVS\fP, as a percentage of the remaining free space in the
|
|
Volume Group with the suffix \fI%FREE\fP, or (for a snapshot) as a percentage
|
|
of the total space in the Origin Logical Volume with the suffix \fI%ORIGIN\fP.
|
|
The resulting value is rounded downward for the subtraction otherwise
|
|
it is rounded upward.
|
|
N.B. In a future release, when expressed as a percentage with PVS, VG or FREE,
|
|
the number will be treated as an approximate total number of physical extents
|
|
to be allocated or freed (including extents used by any mirrors, for example).
|
|
The code may currently allocate or remove more space than you might otherwise
|
|
expect.
|
|
.TP
|
|
.IR \fB\-L ", " \fB\-\-size " [" + | - ] LogicalVolumeSize [ bBsSkKmMgGtTpPeE ]
|
|
Change or set the logical volume size in units of megabytes.
|
|
A size suffix of \fIM\fP for megabytes,
|
|
\fIG\fP for gigabytes, \fIT\fP for terabytes, \fIP\fP for petabytes
|
|
or \fIE\fP for exabytes is optional.
|
|
With the \fI+\fP or \fI-\fP sign the value is added or subtracted
|
|
from the actual size of the logical volume and rounded
|
|
to the full extent size and without it,
|
|
the value is taken as an absolute one.
|
|
.TP
|
|
.BR \-i ", " \-\-stripes " " \fIStripes
|
|
Gives the number of stripes to use when extending a Logical Volume.
|
|
Defaults to whatever the last segment of the Logical Volume uses.
|
|
Not applicable to LVs using the original metadata LVM format, which must
|
|
use a single value throughout.
|
|
.TP
|
|
.IR \fB\-\-poolmetadatasize " [" + ] MetadataVolumeSize [ bBsSkKmMgG ]
|
|
Change or set the thin pool metadata logical volume size.
|
|
With the \fI+\fP sign the value is added to the actual size
|
|
of the metadata volume and rounded to the full extent size
|
|
and without it, the value is taken as an absolute one.
|
|
Maximal size is 16GiB. Default unit is megabytes.
|
|
.TP
|
|
.BR \-I ", " \-\-stripesize " " \fIStripeSize
|
|
Gives the number of kilobytes for the granularity of the stripes.
|
|
Defaults to whatever the last segment of the Logical Volume uses.
|
|
Not applicable to LVs using the original metadata LVM format, which
|
|
must use a single value throughout.
|
|
.br
|
|
StripeSize must be 2^n (n = 2 to 9) for metadata in LVM1 format.
|
|
For metadata in LVM2 format, the stripe size may be a larger
|
|
power of 2 but must not exceed the physical extent size.
|
|
.TP
|
|
.B \-\-noudevsync
|
|
Disable udev synchronisation. The
|
|
process will not wait for notification from udev.
|
|
It will continue irrespective of any possible udev processing
|
|
in the background. You should only use this if udev is not running
|
|
or has rules that ignore the devices LVM2 creates.
|
|
.SH EXAMPLES
|
|
.br
|
|
Extend a logical volume vg1/lv1 by 16MB using physical extents
|
|
/dev/sda:0-1 and /dev/sdb:0-1 for allocation of extents:
|
|
.sp
|
|
.B lvresize -L+16M vg1/lv1 /dev/sda:0-1 /dev/sdb:0-1
|
|
.SH SEE ALSO
|
|
.BR fsadm (8),
|
|
.BR lvm (8),
|
|
.BR lvconvert (8),
|
|
.BR lvcreate (8),
|
|
.BR lvreduce (8),
|
|
.BR lvchange (8)
|