Lvm: Difference between revisions
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resize_reiserfs -s 10G /dev/VolGroup00/LogVol00 # Resize file system to 10GB. | resize_reiserfs -s 10G /dev/VolGroup00/LogVol00 # Resize file system to 10GB. | ||
lvreduce -L 10G /dev/VolGroup00/LogVol00 # Resize logical volume to 1GB. | lvreduce -L 10G /dev/VolGroup00/LogVol00 # Resize logical volume to 1GB. | ||
vgreduce vg0 /dev/vdb1 | |||
mount -t reiserfs /data | mount -t reiserfs /data | ||
Revision as of 09:24, 20 September 2021
Create partition.
fdisk /dev/sda1 n t Partition type 8e
Create physiscal volume.
pvcreate /dev/sda3 pvdisplay
Create volume group.
vgcreate VolGroup00 /dev/sda1 vgdisplay
create logical volume
Create logical volume. Create a logic volume spanning 3 disks, each stripe 256kb, 1,5TB, called LogVol00 in VolGroup00
lvcreate -i3 -I 256 -L1500000 -n LogVol00 VolGroup00 lvcreate -L 5.12G -n LogVol02 VolGroup00 # Create logical volume of 5.12G on Volume group VolGroup00. lvcreate --name apps --size 30G vg0
list volume groups
lvdisplay
Format logical volume.
mkfs.reiserfs /dev/VolGroup00/LogVol02
Extend a resizerfs logical volume.
lvextend -L+70G /dev/VolGroup00/LogVol00 resize_reiserfs -f /dev/VolGroup00/LogVol00
Extent a ext3 partition.
lvextend -L +6g /dev/vgroot/root.fs resize2fs /dev/vgroot/root.fs
Shrink ext2/3 partition.
umount /data # umount /data resize2fs /dev/VolGroup00/LogVol00 10G # Resize file system to 10GB. lvreduce -L 10G /dev/VolGroup00/LogVol00 # Resize logical volume to 1GB. e2fsck -f /dev/VolGroup00/LogVol00 # Check filesystem. mount /data # mount /data
Shrink reizerfs volume. (not tested yet)
umount /data # unmount /data resize_reiserfs -s 10G /dev/VolGroup00/LogVol00 # Resize file system to 10GB. lvreduce -L 10G /dev/VolGroup00/LogVol00 # Resize logical volume to 1GB. vgreduce vg0 /dev/vdb1 mount -t reiserfs /data
resize_reiserfs -s-150M /dev/VolGroup/LogVol00 lvreduce -L-150M /dev/VolGroup00/LogVol00
Create device-mapper in /proc/misc
modprobe dm-mod
Activate Volume Group.
lvm vgchange -a y VolGroup00
Create a snapshot volume.
modprobe dm-snapshot lvcreate --snapshot --size 128M --name LogVol02snap /dev/VolGroup00/LogVol02
Create device maps from partition tables
kpartx -av /dev/VolGroup00/LogVol02
Copy logical volume.
dd if=/dev/VolGroup00/LogVol02 of=/dev/VolGroup00/LogVol03 bs=64M
Extend logical volume with disk.
vgextend vgroot /dev/sdb
Check for Free PE / Size. First we need to enlarge the logical volume.
vgdisplay
Now we enlarged the volume but not the filesystem.
lvextend -l +<number of extents> /dev/<volume group>/<logical volume>
This will grow the filesystem on-line.
resize2fs /dev/<volume group>/<logical volume>
When extending partition by deleting and adding partition.
pvchange -x /dec/sda
Logical volume information
lvs
You should see more than the standard disks.
LV VG Attr LSize Origin Snap% Move Log Copy% Convert lvdata287 vgdata287 -wi--- 500.00G lvdata306 vgdata306 -wi--- 50.00G lvdata370 vgdata370 -wi--- 20.00G lvdata371 vgdata371 -wi--- 600.00G lvlog287 vglog287 -wi--- 100.00G lvlog306 vglog306 -wi--- 20.00G lvlog370 vglog370 -wi--- 10.00G lvlog371 vglog371 -wi--- 20.00G opt.fs vgroot -wi-ao 12.00G root.fs vgroot -wi-ao 4.00G swap.vol vgroot -wi-ao 2.00G var.fs vgroot -wi-ao 8.00G
remove a pv
lvremove vg2 vgremove vg2 pvscan pvremove /dev/xvdg
remove logical volume and volume group when disk has been removed
dmsetup info dmsetup remove vg04-vz
vgs
Look to see if there is any available space.
vgs
lvs
List snapshots
lvs
add snapshot volume
lvcreate -n root_SNAP -s vg0/root -L 1500M
remove snapshot volume
lvremove -f /dev/vg0/root_SNAP
pvresize
Increase size of pv.
pvresize /dev/sdc