Brnusak

1.                 Filesystem / Volume vergrößern

Zur Info: Volume vergrößern funtioniert nur auf direkten Device Path und nicht auf mapper » Path.

ls -la /dev/*/u01

lrwxrwxrwx 1 root root 21 Sep 29 14:41 /dev/oravg/u01 -> /dev/mapper/oravg-u01

# pvscan

 PV /dev/sdb1 VG oravg lvm2 [8.00 GB / 4.00 GB free]
 PV /dev/sda2 VG VolGroup00 lvm2 [5.88 GB / 0 free]
 Total: 2 [13.87 GB] / in use: 2 [13.87 GB] / in no VG: 0 [0 ]

-- Volume um 100MB vergrößern
# lvextend -L +100M /dev/oravg/u01

 Extending logical volume u01 to 4.10 GB
 Logical volume u01 successfully resized

-- Filesystem hat noch gleiche größe.

# df -k /u01

Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/oravg-u01 4128448 3091588 827148 79% /u01

# pvscan

 PV /dev/sdb1 VG oravg lvm2 [8.00 GB / 3.90 GB free]
 PV /dev/sda2 VG VolGroup00 lvm2 [5.88 GB / 0 free]

 Total: 2 [13.87 GB] / in use: 2 [13.87 GB] / in no VG: 0 [0 ]

-- Mount Point wird jetzt vergrößert.

# resize2fs -p /dev/oravg/u01

resize2fs 1.39 (29-May-2006)

Filesystem at /dev/oravg/u01 is mounted on /u01; on-line resizing required
Performing an on-line resize of /dev/oravg/u01 to 1074176 (4k) blocks.
The filesystem on /dev/oravg/u01 is now 1074176 blocks long.

-- Fertig mit den vergrößern.

# df -k /u01

Filesystem 1K-blocks Used Available Use% Mounted on

/dev/mapper/oravg-u01 4228792 3091588 922372 78% /u01

2.                 Filesystem / Volume verkleinern.

# pvscan

 PV /dev/sdb1 VG oravg lvm2 [8.00 GB / 2.90 GB free]
 PV /dev/sda2 VG VolGroup00 lvm2 [5.88 GB / 0 free]

 Total: 2 [13.87 GB] / in use: 2 [13.87 GB] / in no VG: 0 [0 ]

# df -m /TEST

Filesystem 1M-blocks Used Available Use% Mounted on

/dev/mapper/oravg-vlTEST 1008 34 924 4% /TEST

# cd /TEST
# df -k > TEST.log
# ls -l

-rw-r--r-- 1 root root 520 Sep 29 15:42 TEST.log

# umount /TEST
# e2fsck -f /dev/mapper/oravg-vlTEST

e2fsck 1.39 (29-May-2006)

Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information

TEST: 12/131072 files (8.3% non-contiguous), 12646/262144 blocks

-- Filesystem wird verkleinert. 

- Mountpoint muss unmount durchgeführt werden.

# resize2fs /dev/mapper/oravg-vlTEST 800M

resize2fs 1.39 (29-May-2006)

Resizing the filesystem on /dev/mapper/oravg-vlTEST to 204800 (4k) blocks.
The filesystem on /dev/mapper/oravg-vlTEST is now 204800 blocks long.

Zur Info: Volume vergrößern funtioniert nur auf direkten Device Path und nicht auf mapper » Path.

-- Volume wird verkleinert (sollte man mit vorsicht verwenden.), man muss Mountpoint abhängen.

# lvreduce -L 800M /dev/oravg/vlTEST

 WARNING: Reducing active logical volume to 800.00 MB
 THIS MAY DESTROY YOUR DATA (filesystem etc.)
 Do you really want to reduce vlTEST? [y/n]: y
 Reducing logical volume vlTEST to 800.00 MB
 Logical volume vlTEST successfully resized

# mount /dev/mapper/oravg-vlTEST /TEST
# df -m /TEST

Filesystem 1M-blocks Used Available Use% Mounted on

/dev/mapper/oravg-vlTEST 786 34 721 5% /TEST

# cd /TEST
# ls -la

-rw-r--r-- 1 root root 520 Sep 29 15:42 TEST.log

# pvscan

 PV /dev/sdb1 VG oravg lvm2 [8.00 GB / 3.12 GB free]
 PV /dev/sda2 VG VolGroup00 lvm2 [5.88 GB / 0 free]

 Total: 2 [13.87 GB] / in use: 2 [13.87 GB] / in no VG: 0 [0 ]