linux中如何进行LVM扩容_好文资源

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1、查看本机现在磁盘的情况

[root@oralce10g ~开发云主机域名]# df

Filesystem 1K-blocks Used Available Use% Mounted on

/dev/mapper/vg_oralce10g-LogVol03 9591312 4765404 4338692 53% /

tmpfs 883132 72 883060 1% /dev/shm

/dev/sda1 198337 29991 158106 16% /boot

/dev/mapper/vg_oralce10g-LogVol01 4031680 73636 3753244 2% /tmp

/dev/mapper/vg_oralce10g-LogVol02 15118728 14334340 16388 100% /u01

[root@oralce10g ~]# fdisk -l

Disk /dev/sda: 32.2 GB, 32212254720 bytes

255 heads, 63 sectors/track, 3916 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00085d3a

Device Boot Start End Blocks Id System

/dev/sda1 * 1 26 204800 83 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 26 3917 31251456 8e Linux LVM

Disk /dev/sdb: 21.5 GB, 21474836480 bytes ##找doesn’t contain a valid partition table

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/mapper/vg_oralce10g-LogVol00: 2097 MB, 2097152000 bytes

255 heads, 63 sectors/track, 254 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/mapper/vg_oralce10g-LogVol03: 9978 MB, 9978249216 bytes

255 heads, 63 sectors/track, 1213 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/mapper/vg_oralce10g-LogVol01: 4194 MB, 4194304000 bytes

255 heads, 63 sectors/track, 509 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

Disk /dev/mapper/vg_oralce10g-LogVol02: 15.7 GB, 15728640000 bytes

255 heads, 63 sectors/track, 1912 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

2、创建物理卷

[root@oralce10g ~]# pvcreate /dev/sdb

Physical volume “/dev/sdb” successfully created

3、“pvdisplay”命令查看物理卷情况

[root@oralce10g ~]# pvdisplay

— Physical volume —

PV Name /dev/sda2

VG Name vg_oralce10g

PV Size 29.80 GiB / not usable 3.00 MiB

Allocatable yes (but full)

PE Size 4.00 MiB

Total PE 7629

Free PE 0

Allocated PE 7629

PV UUID lRqQzT-LRSi-xUS0-wO54-OBw1-pVan-kCKWIb

“/dev/sdb” is a new physical volume of “20.00 GiB” ###新建的物理卷

— NEW Physical volume —

PV Name /dev/sdb

VG Name

PV Size 20.00 GiB

Allocatable NO

PE Size 0

Total PE 0

Free PE 0

Allocated PE 0

PV UUID 5nHvN3-xTgI-uYNO-245u-arM0-1M8H-CeR1Tp

4、将新添的物理卷加入到已有的逻辑卷组中

[root@oralce10g ~]# vgextend vg_oralce10g /dev/sdb

Volume group “vg_oralce10g” successfully extended

5、查看卷组的空间

[root@oralce10g ~]# vgdisplay

— Volume group —

VG Name vg_oralce10g ##VG名称

System ID

Format lvm2

Metadata Areas 2

Metadata Sequence No 6

VG Access read/write ##VG 访问权限

VG Status resizable

MAX LV 0

Cur LV 4

Open LV 4

Max PV 0

Cur PV 2

Act PV 2

VG Size 49.80 GiB

PE Size 4.活动：慈云数据爆款香港服务器，CTG+CN2高速带宽、快速稳定、平均延迟10+ms 速度快，免备案，每月仅需19元！！点击查看00 MiB

Total PE 12748 ##总的PE个数

Alloc PE / Size 7629 / 29.80 GiB ##已经分配的PE

Free PE开发云主机域名 / Size 5119 / 20.00 GiB ##自由PE数量和大小

VG UUID uSfeH7-09v9-dMRE-E6ex-IQlB-C4QM-3clpUm

6、扩展已有卷的容量（若有 29.9G为剩余可用容量，则可 ,在原有空间上扩容）

[root@oralce10g ~]# lvextend -L 34G -n /dev/mapper/vg_oralce10g-LogVol02 /dev/sdb

Extending logical volume LogVol02 to 34.00 GiB

Logical volume LogVol02 successfully resized

7、以上配置完卷扩容，执行以下命令重新分配磁盘：

[root@oralce10g ~]# resize2fs /dev/mapper/vg_oralce10g-LogVol02

resize2fs 1.41.12 (17-May-2010)

Filesystem at /dev/mapper/vg_oralce10g-LogVol02 is mounted on /u01; on-line resizing required

old desc_blocks = 2, new_desc_blo开发云主机域名cks = 3

Performing an on-line resize of /dev/mapper/vg_oralce10g-LogVol02 to 8912896 (4k) blocks.

The filesystem on /dev/mapper/vg_oralce10g-LogVol02 is now 8912896 blocks long.

[root@oralce10g ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/vg_oralce10g-LogVol03 9.2G 4.6G 4.2G 53% /

tmpfs 863M 72K 863M 1% /dev/shm

/dev/sda1 194M 30M 155M 16% /boot

/dev/mapper/vg_oralce10g-LogVol01 3.9G 72M 3.6G 2% /tmp

/dev/mapper/vg_oralce10g-LogVol02 34G 14G 19G 44% /u01 >lvm已经扩大上述就是小编为大家分享的linux中如何进行LVM扩容了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注开发云行业资讯频道。