Linux操作系统管理-LVM

1 物理卷管理

常用管理命令如下：

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[email protected] ~]# pvcreate /dev/nvme0n2 /dev/nvme0n3 
  Physical volume "/dev/nvme0n2" successfully created.
  Physical volume "/dev/nvme0n3" successfully created.

[[email protected] ~]# pvdisplay
  "/dev/nvme0n2" is a new physical volume of "20.00 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/nvme0n2
  VG Name               
  PV Size               20.00 GiB
  Allocatable           NO
  PE Size               0   
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               hDsQPl-QxkX-M0ba-ZNRV-AgQq-WexX-C40jpZ
   
  "/dev/nvme0n3" is a new physical volume of "20.00 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/nvme0n3
  VG Name               
  PV Size               20.00 GiB
  Allocatable           NO
  PE Size               0   
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               nswccX-p9aH-X0XL-hzFY-EXzZ-seVh-UdmVyo

2 卷组管理

[[email protected] ~]# vgcreate nvm /dev/nvme0n2 /dev/nvme0n3 
  Volume group "nvm" successfully created

常用命令：

vgscan、vgcreate、vgdiskplay、vgremove、vgextend、vgreduce。

3 逻辑卷管理

[[email protected] ~]# lvcreate -n orahome -l 2560 nvm
  Logical volume "orahome" created.

4 格式化文件系统

[[email protected] ~]# mkfs.ext4 /dev/nvm/orahome 
mke2fs 1.44.3 (10-July-2018)
Creating filesystem with 2621440 4k blocks and 655360 inodes
Filesystem UUID: a2251e55-3589-44f6-8a6d-f0bc5a629edd
Superblock backups stored on blocks: 
    32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: done 

5 挂载使用 

[[email protected] ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
devtmpfs                 890M     0  890M   0% /dev
tmpfs                    904M     0  904M   0% /dev/shm
tmpfs                    904M  9.7M  894M   2% /run
tmpfs                    904M     0  904M   0% /sys/fs/cgroup
/dev/nvme0n1p3            18G  5.8G   12G  33% /
/dev/nvme0n1p1           295M  145M  151M  49% /boot
tmpfs                    181M   16K  181M   1% /run/user/42
tmpfs                    181M  3.4M  178M   2% /run/user/1000
/dev/mapper/nvm-orahome  9.8G   37M  9.3G   1% /orcl/oracle
mkdir  -p /orcl/oracle

mount /dev/nvm/orahome /orcl/oracle