Linux文件系统与LVM实际操作

1．为主机增加80G SCSI 接口硬盘

 

2．划分三个各20G的主分区

[root@localhost ~]# lsblk

 

3．将三个主分区转换为物理卷（pvcreate），扫描系统中的物理卷

[root@localhost ~]# pvcreate /dev/sdd[123]

  Physical volume "/dev/sdd1" successfully created

  Physical volume "/dev/sdd2" successfully created

  Physical volume "/dev/sdd3" successfully created

[root@localhost ~]# pvscan

  PV /dev/sda2   VG centos   lvm2 [59.51 GiB / 64.00 MiB free]

  PV /dev/sdd2               lvm2 [20.00 GiB]

  PV /dev/sdd3               lvm2 [20.00 GiB]

  PV /dev/sdd1               lvm2 [20.00 GiB]

  Total: 4 [119.51 GiB] / in use: 1 [59.51 GiB] / in no VG: 3 [60.00 GiB]

4．使用两个物理卷创建卷组，名字为myvg，查看卷组大小

[root@localhost ~]# vgcreate myvg /dev/sdd[12]

  Volume group "myvg" successfully created

[root@localhost ~]# vgdisplay

  --- Volume group ---

  VG Name               myvg

  System ID             

  Format                lvm2

  Metadata Areas        2

  Metadata Sequence No  1

  VG Access             read/write

  VG Status             resizable

  MAX LV                0

  Cur LV                0

  Open LV               0

  Max PV                0

  Cur PV                2

  Act PV                2

  VG Size               39.99 GiB

5．创建逻辑卷mylv，大小为30G

[root@localhost ~]# lvcreate -L 30G -n mylv myvg

  Logical volume "mylv" created.

6．将逻辑卷格式化成xfs文件系统，并挂载到/data目录上，创建文件测试

[root@localhost ~]# mkfs -t xfs /dev/myvg/mylv

meta-data=/dev/myvg/mylv         isize=256    agcount=4, agsize=1966080 blks

         =                       sectsz=512   attr=2, projid32bit=1

         =                       crc=0        finobt=0

data     =                       bsize=4096   blocks=7864320, imaxpct=25

         =                       sunit=0      swidth=0 blks

naming   =version 2              bsize=4096   ascii-ci=0 ftype=0

log      =internal log           bsize=4096   blocks=3840, version=2

         =                       sectsz=512   sunit=0 blks, lazy-count=1

realtime =none                   extsz=4096   blocks=0, rtextents=0

[root@localhost ~]# mkdir -pv /data

mkdir: 已创建目录 "/data"

[root@localhost ~]# mount /dev/myvg/mylv /data

7．增大逻辑卷到35G

[root@localhost data]# lvextend -L +5G /dev/myvg/mylv

  Size of logical volume myvg/mylv changed from 30.00 GiB (7680 extents) to 35.00 GiB (8960 extents).

  Logical volume mylv successfully resized

8．编辑/etc/fstab文件挂载逻辑卷，并支持磁盘配额选项

9．创建磁盘配额，crushlinux用户在/data目录下文件大小软限制为80M，硬限制为100M，

crushlinux用户在/data目录下文件数量软限制为80个，硬限制为100个。

10．使用touch dd 命令在/data目录下测试

11．查看配额的使用情况：用户角度

12．查看配额的使用情况：文件系统角度