目录
1.把磁盘或者分区加入卷组
pvcreate
vgextend
vgdisplay vg0
2.扩容
物理磁盘扩容
文件系统的扩容
注意
一条命令搞定2个步骤
3.特点
查看磁盘,发现已经满了
[root@N1 ~]# echo "66666" > /mnt/data/a.txt -bash: echo: write error: No space left on device [root@N1 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg0-ndata 30G 30G 20K 100% /mnt/data [root@N1 ~]
创建物理卷
[root@N1 ~]# pvcreate /dev/sda4
把新搞的物理卷加入卷组
[root@N1 ~]# vgextend vg0 /dev/sda4 Volume group "vg0" successfully extended
发现加入之后vg0 已经新有可分配的PE了
[root@N1 ~]# vgdisplay vg0 --- Volume group --- VG Name vg0 System ID Format lvm2 Metadata Areas 3 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 3 Act PV 3 VG Size 39.95 GiB PE Size 16.00 MiB Total PE 2557 Alloc PE / Size 1918 / <29.97 GiB Free PE / Size 639 / 9.98 GiB VG UUID R1OqyH-O3MN-kVcn-BF1H-Vy75-x9zf-MZM1Vp
[root@N1 ~]# df -h /dev/mapper/vg0-ndata 30G 30G 20K 100% /mnt/data
这个扩展实际上分为二步,第一步是物理磁盘的扩容。第二步是文件系统的扩容
[root@N1 ~]# lvextend -L +2G /dev/vg0/ndata #不能用满所有空间,需要稍微留一点点空间 Size of logical volume vg0/ndata changed from <29.97 GiB (1918 extents) to <31.97 GiB (2046 extents). Logical volume vg0/ndata successfully resized.
发现vg0 多了2G
[root@N1 ~]# lvs vg0 LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert ndata vg0 -wi-ao---- <31.97g
但是此时用df -h 查看 此时磁盘仍然没有变化的,因为df -h 文件系统容量
xfs_growfs
cat /etc/fstab 查看自动挂载的文件系统信息
[root@N1 ~]# xfs_growfs /mnt/data #看下面加粗提示部分 meta-data=/dev/mapper/vg0-ndata isize=512 agcount=4, agsize=1964032 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=7856128, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=3836, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data blocks changed from 7856128 to 8380416发现文件系统已经变了
[root@N1 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg0-ndata 32G 30G 2.0G 94% /mnt/data
感谢CSDN博主不可言、码海小虾米!!!