LVM 修改 Swap 空间 流程

• 应该查看下/etc/fstab对应挂载,如果是以UUID方式挂载的,应修改为文件或者设备才可以.否责重启后报错
• swap 空间 对应 /dev/vg/lv_swap

关闭swap挂载

swapoff -a    #取消所有的挂载

缩小lv_swap

lvreduce -L -xxx /dev/vg/lv_swap

格式化lv_swap

mkswap /dev/vg/lv_swap

挂载lv_swap

swapon /dev/vg/lv_swap

swap相关命令

[root@54 ~]# swapoff --help

Usage:
 swapoff -a [-v]                      disable all swaps
 swapoff [-v] <special>               disable given swap
 swapoff -h                           display help
 swapoff -V                           display version

The <special> parameter:
 {-L label | LABEL=label}             LABEL of device to be used
 {-U uuid  | UUID=uuid}               UUID of device to be used
 <device>                             name of device to be used
 <file>                               name of file to be used

[root@54 ~]# swapo
swapoff  swapon
[root@54 ~]# swapo
swapoff  swapon
[root@54 ~]# swapon --help

Usage:
 swapon [options] [<special>]
 -a, --all                enable all swaps from /etc/fstab
 -d, --discard[=<policy>] enable swap discards, if supported by device
 -e, --ifexists           silently skip devices that do not exist
 -f, --fixpgsz            reinitialize the swap space if necessary
 -p, --priority <prio>    specify the priority of the swap device
 -s, --summary            display summary about used swap devices
 -h, --help               display help
 -V, --version            display version
 -v, --verbose            verbose output

The <special> parameter:
 {-L label | LABEL=label}             LABEL of device to be used
 {-U uuid  | UUID=uuid}               UUID of device to be used
 <device>                             name of device to be used
 <file>                               name of file to be used