- [root@localhost ~]# df -h
- Filesystem Size Used Avail Use% Mounted on
- /dev/mapper/VolGroup-lv_root 50G 47G 16M 100% / //lv_root满了
- tmpfs 1.9G 72K 1.9G 1% /dev/shm
- /dev/sda1 485M 40M 420M 9% /boot
- /dev/mapper/VolGroup-lv_home 406G 19G 366G 5% /home //lv_home空间很多
- [root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-lv_home 100G
- resize2fs 1.41.12 (17-May-2010)
- Filesystem at /dev/mapper/VolGroup-lv_home is mounted on /home; on-line resizing required
- On-line shrinking from 107865088 to 65536000 not supported. //先umount才能resize2fs
- [root@localhost ~]# umount /home //umount home目录
- [root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-lv_home 100G
- resize2fs 1.41.12 (17-May-2010)
- 请先运行 'e2fsck -f /dev/mapper/VolGroup-lv_home'. //提示要先进行磁盘检测
- [root@localhost ~]# e2fsck -f /dev/mapper/VolGroup-lv_home
- e2fsck 1.41.12 (17-May-2010)
- 第一步: 检查inode,块,和大小
- 第二步: 检查目录结构
- 第3步: 检查目录连接性
- Pass 4: Checking reference counts
- 第5步: 检查簇概要信息
- /dev/mapper/VolGroup-lv_home: 1459/16384000 files (4.0% non-contiguous), 5914204/65536000 blocks
- [root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-lv_home 100G //重定大小
- resize2fs 1.41.12 (17-May-2010)
- Resizing the filesystem on /dev/mapper/VolGroup-lv_home to 26214400 (4k) blocks.
- Begin pass 2 (max = 32768)
- 正在重定位块 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
- Begin pass 3 (max = 2000)
- 正在扫描inode表 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
- The filesystem on /dev/mapper/VolGroup-lv_home is now 26214400 blocks long.
- [root@localhost ~]# mount /home/
- [root@localhost ~]# df -h
- Filesystem Size Used Avail Use% Mounted on
- /dev/mapper/VolGroup-lv_root 50G 47G 16M 100% /
- tmpfs 1.9G 72K 1.9G 1% /dev/shm
- /dev/sda1 485M 40M 420M 9% /boot
- /dev/mapper/VolGroup-lv_home 99G 19G 75G 20% /home
- [root@localhost ~]# lvreduce -L 100G /dev/mapper/VolGroup-lv_home //释放空间
- WARNING: Reducing active and open logical volume to 100.00 GiB
- THIS MAY DESTROY YOUR DATA (filesystem etc.)
- Do you really want to reduce lv_home? [y/n]: y
- Reducing logical volume lv_home to 100.00 GiB
- Logical volume lv_home successfully resized
- [root@localhost ~]# df -h
- Filesystem Size Used Avail Use% Mounted on
- /dev/mapper/VolGroup-lv_root 50G 47G 16M 100% /
- tmpfs 1.9G 72K 1.9G 1% /dev/shm
- /dev/sda1 485M 40M 420M 9% /boot
- /dev/mapper/VolGroup-lv_home 99G 19G 75G 20% /home
- [root@localhost ~]# vgdisplay
- --- Volume group ---
- VG Name VolGroup
- System ID
- Format lvm2
- Metadata Areas 1
- Metadata Sequence No 5
- VG Access read/write
- VG Status resizable
- MAX LV 0
- Cur LV 3
- Open LV 3
- Max PV 0
- Cur PV 1
- Act PV 1
- VG Size 465.27 GiB
- PE Size 4.00 MiB
- Total PE 119109
- Alloc PE / Size 39372 / 153.80 GiB
- Free PE / Size 79737 / 311.47 GiB //空闲空间
- VG UUID Vt2V4t-Byxs-tQqk-cY0h-IDE3-pabX-LUfkRS
- [root@localhost ~]# lvextend -L +311.47G /dev/mapper/VolGroup-lv_root //空闲空间加入到lv_root
- Rounding size to boundary between physical extents: 311.47 GiB
- Extending logical volume lv_root to 361.47 GiB
- Logical volume lv_root successfully resized
- [root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-lv_root
- resize2fs 1.41.12 (17-May-2010)
- Filesystem at /dev/mapper/VolGroup-lv_root is mounted on /; on-line resizing required
- old desc_blocks = 4, new_desc_blocks = 23 //这儿要耐心等待,扩大越多,时间越长
- Performing an on-line resize of /dev/mapper/VolGroup-lv_root to 94757888 (4k) blocks.
- The filesystem on /dev/mapper/VolGroup-lv_root is now 94757888 blocks long.
- [root@localhost openfire]# df -h
- Filesystem Size Used Avail Use% Mounted on
- /dev/mapper/VolGroup-lv_root 356G 48G 308G 14% /
- tmpfs 1.9G 72K 1.9G 1% /dev/shm
- /dev/sda1 485M 40M 420M 9% /boot
- /dev/mapper/VolGroup-lv_home 99G 19G 75G 20% /home