centos6上调整lv逻辑卷分析

访客 阅读:191 2020-04-10 13:30:10 评论:0

author:headsen chen

date:2019-03-18  14:48:17

 

1,查看分区状态,发现/ 分区不够用。/home分区太大了。浪费

[[email protected] ~]# df -h 
Filesystem            Size  Used Avail Use% Mounted on 
/dev/mapper/VolGroup-lv_root 
                      50G  1.8G  49G   2% / 
tmpfs                 931M     0  931M   0% /dev/shm 
/dev/sda1             477M   40M  412M   9% /boot 
/dev/mapper/VolGroup-lv_home 
                      65G   32M  61.6G   1% /home 

 2,卸载 /home分区

[[email protected] ~]# umount /home 
[[email protected] ~]# df -h 
Filesystem            Size  Used Avail Use% Mounted on 
/dev/mapper/VolGroup-lv_root 
                       50G  1.8G   45G   4% / 
tmpfs                 931M     0  931M   0% /dev/shm 
/dev/sda1             477M   40M  412M   9% /boot 

       假如要是无法卸载:使用 fuse -km /home 强制杀死站用该/home 分区的进程

查看总的lv的情况

[[email protected] ~]# lvs 
  LV      VG       Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert 
  lv_home VolGroup -wi-a----- 65.65g                                                     
  lv_root VolGroup -wi-ao---- 50.00g                                                     
  lv_swap VolGroup -wi-ao----  3.86g          

设置文件系统下的  /lv_home分区的大小为5G                                          

[[email protected] ~]# resize2fs -p /dev/VolGroup/lv_home 5G 
resize2fs 1.41.12 (17-May-2010) 
Please run 'e2fsck -f /dev/VolGroup/lv_home' first. 
 
[[email protected] ~]# e2fsck -f /dev/VolGroup/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/VolGroup/lv_home: 11/4308992 files (0.0% non-contiguous), 316463/17209344 blocks 
 
[[email protected] ~]# resize2fs -p /dev/VolGroup/lv_home 5G 
resize2fs 1.41.12 (17-May-2010) 
Resizing the filesystem on /dev/VolGroup/lv_home to 1310720 (4k) blocks. 
Begin pass 2 (max = 32768) 
Relocating blocks             XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 
Begin pass 3 (max = 526) 
Scanning inode table          XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 
The filesystem on /dev/VolGroup/lv_home is now 1310720 blocks long. 

挂载 /home 分区

[[email protected] ~]# mount /dev/VolGroup/lv_home 
[[email protected] ~]# df -h 
Filesystem            Size  Used Avail Use% Mounted on 
/dev/mapper/VolGroup-lv_root 
                       50G  1.8G   45G   4% / 
tmpfs                 931M     0  931M   0% /dev/shm 
/dev/sda1             477M   40M  412M   9% /boot 
/dev/mapper/VolGroup-lv_home 
                      4.8G   32M  4.6G   1% /home 

但此时的lv配置并没有改变:

[[email protected] ~]# lvs 
  LV      VG       Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert 
  lv_home VolGroup -wi-ao---- 65.65g                                                     
  lv_root VolGroup -wi-ao---- 50.00g                                                     
  lv_swap VolGroup -wi-ao----  3.86g             

 修改lv的配置大小为5G                                       

[[email protected] ~]# lvreduce -L 5G /dev/VolGroup/lv_home     #  设置lv_home 大小为5g 
  WARNING: Reducing active and open logical volume to 5.00 GiB. 
  THIS MAY DESTROY YOUR DATA (filesystem etc.) 
Do you really want to reduce VolGroup/lv_home? [y/n]: y 
  Size of logical volume VolGroup/lv_home changed from 60.00 GiB (15360 extents) to 5.00 GiB (1280 extents). 
  Logical volume lv_home successfully resized. 
[[email protected] ~]# lvs 
  LV      VG       Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert 
  lv_home VolGroup -wi-ao----  5.00g                                                     
  lv_root VolGroup -wi-ao---- 50.00g                                                     
  lv_swap VolGroup -wi-ao----  3.86g                                                     
[[email protected] ~]# vgs 
  VG       #PV #LV #SN Attr   VSize   VFree 
  VolGroup   1   3   0 wz--n- 119.51g 60.65g 

 增加/lv_root 的大小:60g

[[email protected] ~]# lvextend -L +60G /dev/VolGroup/lv_root 
  Size of logical volume VolGroup/lv_root changed from 50.00 GiB (12800 extents) to 80.00 GiB (20480 extents). 
  Logical volume lv_root successfully resized. 
[[email protected] ~]# resize2fs -p /dev/VolGroup/lv_root 
resize2fs 1.41.12 (17-May-2010) 
Filesystem at /dev/VolGroup/lv_root is mounted on /; on-line resizing required 
old desc_blocks = 4, new_desc_blocks = 5 
Performing an on-line resize of /dev/VolGroup/lv_root to 20971520 (4k) blocks. 
The filesystem on /dev/VolGroup/lv_root is now 20971520 blocks long.
[[email protected] ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
                       109G  1.8G   103G   3% /
tmpfs                 931M     0  931M   0% /dev/shm
/dev/sda1             477M   40M  412M   9% /boot
/dev/mapper/VolGroup-lv_home
                      4.8G   32M  4.6G   1% /home
[[email protected] ~]# vgs
  VG       #PV #LV #SN Attr   VSize   VFree  
  VolGroup   1   3   0 wz--n- 119.51g 664.00m

 

标签:linux
声明

1.本站遵循行业规范,任何转载的稿件都会明确标注作者和来源;2.本站的原创文章,请转载时务必注明文章作者和来源,不尊重原创的行为我们将追究责任;3.作者投稿可能会经我们编辑修改或补充。

发表评论
搜索
关注我们

扫一扫关注我们,了解最新精彩内容