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man/lvcreate.8_end
100 строк4 KB
Zdenek Kabelac
man: updates and typography
28 апр 2025, 15:19
28 апр 2025, 15:19c1bfc87
.
.SH EXAMPLES
.
Create a striped LV with 3 stripes, a stripe size of 8\ KiB
and a size of 100\ MiB.
The LV name is chosen by lvcreate.
.br
.B lvcreate -i 3 -I 8 -L 100m vg00
.P
Create a raid1 LV with two images, and a usable size of 500\ MiB.
This operation requires two devices, one for each mirror image.
RAID metadata (superblock and bitmap) is also included on the two devices.
.br
.B lvcreate --type raid1 -m1 -L 500m -n mylv vg00
.P
Create a mirror LV with two images, and a usable size of 500\ MiB.
This operation requires three devices: two for mirror images and
one for a disk log.
.br
.B lvcreate --type mirror -m1 -L 500m -n mylv vg00
.P
Create a mirror LV with 2 images, and a usable size of 500\ MiB.
This operation requires 2 devices because the log is in memory.
.br
.B lvcreate --type mirror -m1 --mirrorlog core -L 500m -n mylv vg00
.P
Create a copy-on-write snapshot of an LV:
.br
.B lvcreate --snapshot --size 100m --name mysnap vg00/mylv
.P
Create a copy-on-write snapshot with a size sufficient
for overwriting 20% of the size of the original LV.
.br
.B lvcreate -s -l 20%ORIGIN -n mysnap vg00/mylv
.P
Create a sparse LV with 1 TiB of virtual space,
and actual space just under 100\ MiB.
.br
.B lvcreate --snapshot --virtualsize 1t --size 100m --name mylv vg00
.P
Create a linear LV with a usable size of 64\ MiB on specific physical extents.
.br
.B lvcreate -L 64m -n mylv vg00 /dev/sda:0-7 /dev/sdb:0-7
.P
Create a RAID5 LV with a usable size of 5 GiB, 3 stripes, a stripe size of
64\ KiB, using a total of 4 devices (including one for parity).
.br
.B lvcreate --type raid5 -L 5G -i 3 -I 64 -n mylv vg00
.P
Create a RAID5 LV using all of the free space in the VG and spanning all the
PVs in the VG (note that the command will fail if there are more than 8 PVs in
the VG, in which case \fB-i 7\fP must be used to get to the current maximum of
8 devices including parity for RaidLVs).
.br
.B lvcreate --config allocation/\:raid_stripe_all_devices=1 \
--type raid5 -l 100%FREE -n mylv vg00
.P
Create RAID10 LV with a usable size of 5 GiB, using 2 stripes,
each on a two-image mirror.
(Note that the \fB-i\fP and \fB-m\fP arguments behave differently:
\fB-i\fP specifies the total number of stripes,
but \fB-m\fP specifies the number of images in addition
to the first image).
.br
.B lvcreate --type raid10 -L 5G -i 2 -m 1 -n mylv vg00
.P
Create a 1 TiB thin LV mythin, with 256 GiB thinpool tpool0 in vg00.
.br
.B lvcreate -T -V 1T --size 256G --name mythin vg00/tpool0
.P
Create a 1 TiB thin LV, first creating a new thin pool for it,
where the thin pool has 100\ MiB of space, uses 2 stripes,
has a 64\ KiB stripe size, and 256\ KiB chunk size.
.br
.B lvcreate --type thin --name mylv --thinpool mypool -V 1t \
-L 100m -i 2 -I 64 -c 256 vg00
.P
Create a thin snapshot of a thin LV (the size option must not be used,
otherwise a copy-on-write snapshot would be created).
.br
.B lvcreate --snapshot --name mysnap vg00/thinvol
.P
Create a thin snapshot of the read-only inactive LV named "origin"
which becomes an external origin for the thin snapshot LV.
.br
.B lvcreate --snapshot --name mysnap --thinpool mypool vg00/origin
.P
Create a cache pool from a fast physical device. The cache pool can
then be used to cache an LV.
.br
.B lvcreate --type cache-pool -L 1G -n my_cpool vg00 /dev/fast1
.P
Create a cache LV, first creating a new origin LV on a slow physical device,
then combining the new origin LV with an existing cache pool.
.br
.B lvcreate --type cache --cachepool my_cpool -L 100G -n mylv vg00 /dev/slow1
.P
Create a VDO LV vdo0 with VDOPoolLV size of 10 GiB and name vpool1.
.br
.B lvcreate --vdo --size 10G --name vdo0 vg00/vpool1