4.12-Lvm講解（下）拓展卷組

拓展卷組
查看下卷組信息

[root@evan-01 ~]# vgs
  VG     #PV #LV #SN Attr   VSize   VFree 
  centos   1   2   0 wz--n- <19.00g     0 
  vg1      2   1   0 wz--n-   1.99g <1.70g
[root@evan-01 ~]# 

當邏輯卷持續增大，增大到超過卷組大小的時候，我們就得想辦法來拓展卷組

[root@evan-01 ~]# fdisk -l /dev/sdb

Disk /dev/sdb: 10.7 GB, 10737418240 bytes, 20971520 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x6f975573

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048     2099199     1048576   8e  Linux LVM
/dev/sdb2         2099200     4196351     1048576   8e  Linux LVM
/dev/sdb3         4196352     6293503     1048576   8e  Linux LVM
[root@evan-01 ~]#

我們給 sdb1 和 sbd2 組成了卷組，現在還剩一個 sdb3 ，我們把 sdb3 添加進去

添加到vg1

[root@evan-01 ~]# vgextend vg1 /dev/sdb3
  Volume group "vg1" successfully extended
[root@evan-01 ~]# 

查看下vg1

[root@evan-01 ~]# vgdisplay
  --- Volume group ---
  VG Name               centos
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <19.00 GiB
  PE Size               4.00 MiB
  Total PE              4863
  Alloc PE / Size       4863 / <19.00 GiB
  Free  PE / Size       0 / 0   
  VG UUID               WR4onu-xheI-7NwR-5vW1-y0Ek-eilK-Yil3A2
   
  --- Volume group ---
  VG Name               vg1
  System ID             
  Format                lvm2
  Metadata Areas        3
  Metadata Sequence No  6
  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               <2.99 GiB
  PE Size               4.00 MiB
  Total PE              765
  Alloc PE / Size       75 / 300.00 MiB
  Free  PE / Size       690 / <2.70 GiB
  VG UUID               NqGfri-SPW4-rw52-bQCE-YcxO-i0sH-cJkPfX
   
[root@evan-01 ~]#

用vgs查看

[root@evan-01 ~]# vgs
  VG     #PV #LV #SN Attr   VSize   VFree 
  centos   1   2   0 wz--n- <19.00g     0 
  vg1      3   1   0 wz--n-  <2.99g <2.70g
[root@evan-01 ~]#