改變 PE 大小 – LV 的 PE 數量

  1. VG vg_mntx 的 PE 大小由 2M 改成 4M 後,LV pubx 的 LE 個數由原來的 12 個自動改成 6 個,總大小不變,一樣是 24M。
    [root@kvm10 ~]# lvdisplay /dev/vg_mntx/pubx 
      --- Logical volume ---
      LV Path                /dev/vg_mntx/pubx
      LV Name                pubx
      VG Name                vg_mntx
      LV UUID                FUbp9Q-jIOJ-rR6r-H2sv-mNqv-rlv5-3jYXEH
      LV Write Access        read/write
      LV Creation host, time kvm10.deyu.wang, 2019-11-11 14:16:55 +0800
      LV Status              available
      # open                 0
      LV Size                24.00 MiB
      Current LE             6
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     8192
      Block device           253:3
    
  2. 修改 LV pubx 的 LE 個數由原來的 6 個改成 50 個。
    [root@kvm10 ~]# lvresize -l 50 -r /dev/vg_mntx/pubx
    fsck from util-linux 2.32.1
    /dev/mapper/vg_mntx-pubx: 11/6144 files (0.0% non-contiguous), 2012/24576 blocks
      Size of logical volume vg_mntx/pubx changed from 24.00 MiB (6 extents) to 200.00 MiB (50 extents).
      Logical volume vg_mntx/pubx successfully resized.
    resize2fs 1.44.3 (10-July-2018)
    Resizing the filesystem on /dev/mapper/vg_mntx-pubx to 204800 (1k) blocks.
    The filesystem on /dev/mapper/vg_mntx-pubx is now 204800 (1k) blocks long.
    
  3. 再查看 LV pubx 的 LE 個數已改成 50 個。
    [root@kvm10 ~]# lvdisplay /dev/vg_mntx/pubx | grep LE
      Current LE             50