lvm收缩逻辑卷空间是怎样的_好文资源

今天就跟大家聊聊有关lvm收缩逻辑卷空间是怎样的，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。[root@cspserver1 /]# umount /softdata

[root@cspserver1 /]# df -h

Filesystem Size Used Avail Use%活动：慈云数据爆款香港服务器，CTG+CN2高速带宽、快速稳定、平均延迟10+ms 速度快，免备案，每月仅需19元！！点击查看 Mounted on

/dev/mapper/RHELVG-ROOT

15G 12G 2.6G 82% /

tmpfs 16G 7.8G 8.0G 50% /dev/shm

/dev/sda1 190M 40M 141M 23% /boot

/dev/mapper/RHELVG-HOME

20G 55M 19G 1% /home

/dev/mapper/RHELVG-OPT

15G 13G 1.2G 92% /opt

/dev/mapper/RHELVG-TMP

15G 44M 14G 1% /tmp

/dev/mapper/RHELVG-USR

15G 3.8G 11G 28% /usr

/dev/mapper/RHELVG-VAR

15G 261M 14G 2% /var[root@cspserver1 /]# e2fsck -f /dev/mapper/RHELVG-SOFTDATA

e2fsck 1.41.12 (17-May-2010)

Pass 1: Checking inodes, blocks, and siz开发云主机域名es

Pass 2: Checking directory structure

Pass 3: Checking directory connectivity

Pass 4: Checking reference counts

Pass 5: Checking group summary information

/dev/mapper/RHELVG-SOFTDATA: 11/2559088 files (0.0% non-contiguous), 205643/10232832 blocks

[root@cspserver1 /]# resize2fs /dev/mapper/RHELVG-SOFTDATA 10240m （文件系统缩到10g）

resize2fs 1.41.12 (17-May-2010)

Resizing the filesystem on /dev/mapper/RHELVG-SOFTDATA to 2621440 (4k) blocks.

The filesystem on /dev/mapper/RHELVG-SOFTDATA is now 2621440 blocks long.is already 2621440 blocks long. Nothing to do![root@cspserver1 /]# lvreduce -L 10240m /dev/mapper/RHELVG-SOFTDATA （再缩lv）

WARNING: Reducing active logical volume to 10.00 GiB.

THIS MAY DESTROY YOUR DATA (filesystem etc.)

Do you really want to reduce RHELVG/SOFTDATA? [y/n]: y

Size of logical volume RHELVG/SOFTDATA changed from 39.04 GiB (9993 extents) to 10.00 GiB (2560 extents).

Logical volume SOFTDATA successfully resized.

[root@cspserver1 /]# mount /dev/mapper/RHELVG-SOFTDATA /softdata

[root@cspserver1 /]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/RHELVG-ROOT

15G 12G 2.6G 82% /

tmpfs 16G 7.8G 8.0G 50% /dev/shm

/dev/sda1 190M 40M 141M 23% /boot

/dev/mapper/RHELVG-HOME

20G 55M 19G 1% /home

/dev/mapper/RHELVG-OPT

15G 13G 1.2G 92% /opt

/dev/mapper/RHELVG-TMP

15G 44M 14G 1% /tmp

/dev/mapper/RHELVG-USR

15G 3.8G 11G 28% /usr

/dev/mapper/RHELVG-VAR

15G 261M 14G 2% /var

/dev/mapper/RHELVG-SOFTDATA

9.8G 36M 9.2G 1% /softdata

[root@cspserver1 /]# pvs

PV VG Fmt Attr PSize PFree

/dev/sda2 RHELVG lvm2 a–u 149.80g 29.0开发云主机域名4g

[root@cspserver1 /]# lvextend -L +20480M /dev/mapper/RHELVG-OPT (扩展逻辑卷)

Size of logical volume RHELVG/OPT changed from 15.00 GiB (3840 extents) to 35.00 GiB (8960 extents).

Logical volume OPT successfully resized.

[root@cspserver1 /]# resize2fs /dev/mapper/RHELVG-OPT （将扩展的逻辑卷同步到文件系统）

resize2fs 1.41.12 (17-May-2010)

Filesystem at /dev/mapper/RHELVG-OPT is mo开发云主机域名unted on /opt; on-line resizing required

old desc_blocks = 1, new_desc_blocks = 3

Performing an on-line resize of /dev/mapper/RHELVG-OPT to 9175040 (4k) blocks.

The filesystem on /dev/mapper/RHELVG-OPT is now 9175040 blocks long.[root@cspserver1 /]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/RHELVG-ROOT

15G 12G 2.6G 82% /

tmpfs 16G 7.8G 8.0G 50% /dev/shm

/dev/sda1 190M 40M 141M 23% /boot

/dev/mapper/RHELVG-HOME

20G 55M 19G 1% /home

/dev/mapper/RHELVG-OPT

35G 13G 20G 40% /opt

/dev/mapper/RHELVG-TMP

15G 44M 14G 1% /tmp

/dev/mapper/RHELVG-USR

15G 3.8G 11G 28% /usr

/dev/mapper/RHELVG-VAR

15G 261M 14G 2% /var

/dev/mapper/RHELVG-SOFTDATA

9.8G 36M 9.2G 1% /softdata

[root@cspserver1 /]#看完上述内容，你们对lvm收缩逻辑卷空间是怎样的有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注开发云行业资讯频道，感谢大家的支持。