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4fbde0143a
We want to keep this logic - when LV is extend - extend the LV by at least given amount, when LV is reduced - reduce the LV by at most given amount. So for this the rounding needs to be used. Current logic which seems to satisfy give rule is to round up all extent values for LV resize upward except for values with '-' sign that are round downward. This patch also fixes the problem when lvextend --use-polices tried to extend LV the by i.e. 20% - but the resulting 20% were smaller the extent size thus before this patch no extension happened.
103 lines
3.8 KiB
Groff
103 lines
3.8 KiB
Groff
.TH LVEXTEND 8 "LVM TOOLS #VERSION#" "Sistina Software UK" \" -*- nroff -*-
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.SH NAME
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lvextend \- extend the size of a logical volume
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.SH SYNOPSIS
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.B lvextend
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[\-\-alloc AllocationPolicy]
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[\-A|\-\-autobackup y|n] [\-d|\-\-debug] [\-h|\-?|\-\-help]
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[\-\-noudevsync]
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[\-i|\-\-stripes Stripes [\-I|\-\-stripesize StripeSize]]
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{\-l|\-\-extents [+]LogicalExtentsNumber[%{VG|LV|PVS|FREE|ORIGIN}] |
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\-L|\-\-size [+]LogicalVolumeSize[bBsSkKmMgGtTpPeE]}
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[\-f|\-\-force]
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[\-n|\-\-nofsck]
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[\-r|\-\-resizefs]
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[\-t|\-\-test]
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[\-v|\-\-verbose] LogicalVolumePath [PhysicalVolumePath[:PE[-PE]]...]
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.SH DESCRIPTION
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lvextend allows you to extend the size of a logical volume.
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Extension of snapshot logical volumes (see
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.B lvcreate(8)
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for information to create snapshots) is supported as well.
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But to change the number of copies in a mirrored logical
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volume use
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.BR lvconvert (8).
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.SH OPTIONS
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See \fBlvm\fP for common options.
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.TP
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.I \-\-noudevsync
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Disable udev synchronisation. The
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process will not wait for notification from udev.
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It will continue irrespective of any possible udev processing
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in the background. You should only use this if udev is not running
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or has rules that ignore the devices LVM2 creates.
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.TP
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.I \-l, \-\-extents [+]LogicalExtentsNumber[%{VG|LV|PVS|FREE|ORIGIN}]
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Extend or set the logical volume size in units of logical extents.
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With the + sign the value is added to the actual size
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of the logical volume and without it, the value is taken as an absolute one.
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The number can also be expressed as a percentage of the total space
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in the Volume Group with the suffix %VG, relative to the existing
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size of the Logical Volume with the suffix %LV, of the remaining
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free space for the specified PhysicalVolume(s) with the suffix %PVS,
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as a percentage of the remaining free space in the Volume Group
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with the suffix %FREE, or (for a snapshot) as a percentage of the total
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space in the Origin Logical Volume with the suffix %ORIGIN.
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The resulting value is rounded upward.
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.TP
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.I \-L, \-\-size [+]LogicalVolumeSize[bBsSkKmMgGtTpPeE]
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Extend or set the logical volume size in units of megabytes.
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A size suffix of M for megabytes,
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G for gigabytes, T for terabytes, P for petabytes
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or E for exabytes is optional.
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With the + sign the value is added to the actual size
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of the logical volume and without it, the value is taken as an absolute one.
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.TP
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.I \-i, \-\-stripes Stripes
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Gives the number of stripes for the extension.
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Not applicable to LVs using the original metadata LVM format, which must
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use a single value throughout.
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.TP
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.I \-I, \-\-stripesize StripeSize
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Gives the number of kilobytes for the granularity of the stripes.
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Not applicable to LVs using the original metadata LVM format, which must
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use a single value throughout.
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.br
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StripeSize must be 2^n (n = 2 to 9)
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.TP
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.I \-f, \-\-force
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Proceed with size extension without prompting.
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.TP
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.I \-n, \-\-nofsck
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Do not perform fsck before extending filesystem when filesystem
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requires it. You may need to use \fB--force\fR to proceed with
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this option.
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.TP
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.I \-r, \-\-resizefs
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Resize underlying filesystem together with the logical volume using
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\fBfsadm\fR(8).
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.SH Examples
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"lvextend -L +54 /dev/vg01/lvol10 /dev/sdk3" tries to extend the size of
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that logical volume by 54MB on physical volume /dev/sdk3.
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This is only possible if /dev/sdk3 is a member of volume group vg01 and
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there are enough free physical extents in it.
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"lvextend /dev/vg01/lvol01 /dev/sdk3" tries to extend the size of that
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logical volume by the amount of free space on physical volume /dev/sdk3.
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This is equivalent to specifying "-l +100%PVS" on the command line.
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.br
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"lvextend -L+16M vg01/lvol01 /dev/sda:8-9 /dev/sdb:8-9"
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.br
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tries to extend a logical volume "vg01/lvol01" by 16MB using physical extents
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/dev/sda:8-9 and /dev/sdb:8-9 for allocation of extents.
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.SH SEE ALSO
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.BR fsadm (8),
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.BR lvm (8),
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.BR lvcreate (8),
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.BR lvconvert (8),
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.BR lvreduce (8),
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.BR lvresize (8),
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.BR lvchange (8)
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