linux调整目录分区大小，linux调整home目录大小，linux调整root目录大小（一：ext格式）
本篇：linux调整目录分区大小，linux调整home目录大小，linux调整root目录大小（一：ext格式）
下篇：linux调整目录分区大小，linux调整home目录大小，linux调整root目录大小（二：xfs格式）
注意vg_sql-lv_home其中的sql其实为hostname!
一、首先df -h查看分区情况（这里我想调整home目录）
|
1 2 3 4 5 6 7 8 |
[root@sql ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_sql-lv_root 50G 906M 46G 2% / tmpfs 935M 0 935M 0% /dev/shm /dev/sda1 477M 30M 422M 7% /boot /dev/mapper/vg_sql-lv_home 341G 67M 323G 1% /home |
二、卸载home目录umount /home
|
1 2 3 4 5 6 7 |
[root@sql ~]# umount /home [root@sql ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_sql-lv_root 50G 706M 46G 2% / tmpfs 935M 0 935M 0% /dev/shm /dev/sda1 477M 30M 422M 7% /boot |
三、重新指定/home目录大小
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
[root@sql ~]# e2fsck -f /dev/mapper/vg_sql-lv_home e2fsck 1.41.12 (17-May-2010) 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 /dev/mapper/vg_sql-lv_home: 11/22650880 files (0.0% non-contiguous), 1471409/90597376 blocks [root@sql ~]# resize2fs -p /dev/mapper/vg_sql-lv_home 30G resize2fs 1.41.12 (17-May-2010) Resizing the filesystem on /dev/mapper/vg_sql-lv_home to 7864320 (4k) blocks. Begin pass 2 (max = 32768) Relocating blocks XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Begin pass 3 (max = 2765) Scanning inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX The filesystem on /dev/mapper/vg_sql-lv_home is now 7864320 blocks long. |
四、挂载/home，然后查看调整后的大小
|
1 2 3 4 5 6 7 8 9 |
[root@sql ~]# mount /home [root@sql ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_sql-lv_root 50G 706M 46G 2% / tmpfs 935M 0 935M 0% /dev/shm /dev/sda1 477M 30M 422M 7% /boot /dev/mapper/vg_sql-lv_home 30G 44M 28G 1% /home |
五、用lvreduce命令把目标分区(/home)减小至30G
|
1 2 3 4 5 6 |
[root@sql ~]# lvreduce -L 30G /dev/mapper/vg_sql-lv_home WARNING: Reducing active and open logical volume to 30.00 GiB THIS MAY DESTROY YOUR DATA (filesystem etc.) Do you really want to reduce lv_home? [y/n]: y Size of logical volume vg_sql/lv_home changed from 345.60 GiB (88474 extents) to 30.00 GiB (7680 extents). Logical volume lv_home successfully resized |
六、用vgdisplay命令查看多余的空间，可以看到多出约320G的空间
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 |
[root@sql ~]# vgdisplay --- Volume group --- VG Name vg_sql 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 399.51 GiB PE Size 4.00 MiB Total PE 102274 Alloc PE / Size 21480 / 83.91 GiB Free PE / Size 80794 / 315.60 GiB VG UUID L9OUKR-6alh-ms7H-yimo-ypYm-lLYa-DqkpMC |
七、用lvextend命令将多余的约320G空间挂载到/目录下
注：在设定lv_root的大小时，不要把Free PE / Size的空间全部都用上，这很可能会出现Free PE空间不足的现象，建议保留一点Free PE的空间。
另：我这里搞上完没有出错，其实没有出错，查看空闲大小，显示Free PE / Size 0 / 0
|
1 2 3 4 |
[root@sql ~]# lvextend -L +315.60G /dev/mapper/vg_sql-lv_root Rounding size to boundary between physical extents: 315.60 GiB Size of logical volume vg_sql/lv_root changed from 50.00 GiB (12800 extents) to 365.60 GiB (93594 extents). Logical volume lv_root successfully resized |
八、激活目录大小（扩展后的/目录）
注：执行这个命令后，会进入漫长的等待，这里我是机械硬盘，且调整分区约320G，耗时较长
|
1 2 3 4 5 6 |
[root@sql ~]# resize2fs -p /dev/mapper/vg_sql-lv_root resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/mapper/vg_sql-lv_root is mounted on /; on-line resizing required old desc_blocks = 4, new_desc_blocks = 23 Performing an on-line resize of /dev/mapper/vg_sql-lv_root to 95840256 (4k) blocks. The filesystem on /dev/mapper/vg_sql-lv_root is now 95840256 blocks long. |
九、df -h查看修改成功后的分区情况
|
1 2 3 4 5 6 7 8 |
[root@sql ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_sql-lv_root 360G 720M 341G 1% / tmpfs 935M 0 935M 0% /dev/shm /dev/sda1 477M 30M 422M 7% /boot /dev/mapper/vg_sql-lv_home 30G 44M 28G 1% /home |
Copyright：cpp.cloudcpp.com Share、Open- C/C++程序员之家