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 ~]# vi fdisk.sh
#!bin/bash
fdisk /dev/sdb<<EOF
n
p
1
+20G
n
p
2
+20G
n
p
3
+20G
n
w
EOF
[root@localhost ~]# fdisk -l /dev/sdb
磁盘 /dev/sdb：85.9 GB, 85899345920 字节，167772160 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理)：512 字节 / 512 字节
I/O 大小(最小/最佳)：512 字节 / 512 字节
磁盘标签类型：dos
磁盘标识符：0xda48581c
设备 Boot Start End Blocks Id System
/dev/sdb1 2048 41945087 20971520 83 Linux
/dev/sdb2 41945088 83888127 20971520 83 Linux
/dev/sdb3 83888128 125831167 20971520 83 Linux
/dev/sdb4 125831168 167772159 20970496 5 Extended
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/sdb1
Physical volume "/dev/sdb1" successfully created
[root@localhost ~]# pvcreate /dev/sdb2
Physical volume "/dev/sdb2" successfully created
[root@localhost ~]# pvcreate /dev/sdb3
Physical volume "/dev/sdb3" successfully created
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 -s 8 myvg /dev/sdb[12]
Volume group "myvg" successfully created
[root@localhost ~]# vgdisplay /dev/myvg
--- 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 39.98 GiB
PE Size 8.00 MiB
Total PE 5118
Alloc PE / Size 0 / 0
Free PE / Size 5118 / 39.98 GiB
VG UUID vReCKf-e33K-bjT3-WzZI-wJ9Y-hQGA-sR5TXZ
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 /data
[root@localhost ~]# mount /dev/myvg/mylv /data
7．增大逻辑卷到35G
[root@localhost ~]# lvextend -L +5G /dev/myvg/mylv
Size of logical volume myvg/mylv changed from 30.00 GiB (3840 extents) to 35.00 GiB (4480 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
[root@localhost ~]# vim /etc/fstab
/dev/myvg/mylv /data xfs defaults,usrquota,grpquota 0 0
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。
[root@localhost ~]# mount -a
[root@localhost ~]# quotacheck -vug /data/
quotacheck: Skipping /dev/mapper/myvg-mylv [/data]
quotacheck: Cannot find filesystem to check or filesystem not mounted with quota option.
[root@localhost ~]# quotaon -uv /data/
quotaon: Enforcing user quota already on /dev/mapper/myvg-mylv
[root@localhost ~]# useradd -d /data/milk milk
[root@localhost ~]# edquota -u milk
/dev/mapper/myvg-mylv 12 81920 102400 7 80 100
10．使用touch dd 命令在/data目录下测试
[root@localhost ~]# su milk
[milk@localhost root]$ cd
[milk@localhost ~]$ touch a
[milk@localhost ~]$ dd if=/dev/zero of=./b bs=1M count=100
dd: 写入"./b" 出错: 超出磁盘限额
记录了100+0 的读入
记录了99+0 的写出
104837120字节(105 MB)已复制，3.20284 秒，32.7 MB/秒
11．查看配额的使用情况：用户角度
[milk@localhost ~]$ du -sh
100M .
12．查看配额的使用情况：文件系统角度
[root@localhost milk]# repquota -auvs
*** Report for user quotas on device /dev/mapper/myvg-mylv
Block grace time: 7days; Inode grace time: 7days
Space limits File limits
User used soft hard grace used soft hard grace
----------------------------------------------------------------------
root -- 0K 0K 0K 3 0 0
milk +- 100M 81920K 100M 6days 14 80 100
*** Status for user quotas on device /dev/mapper/myvg-mylv
Accounting: ON; Enforcement: ON
Inode: #131 (2 blocks, 2 extents)