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masteer
Asked: 2024-08-23 18:30:05 +0800 CST

lvextend 没有使用可用空间？

  • 772

我在添加新的存储机柜后尝试增加 pv/vg/lv 的大小，并且创建了 2 个新卷并将其连接到主机。虽然增加 PV 和 VG 效果很好，但 LV 似乎看不到任何可用空间。也许有人可以告诉我为什么这不起作用？

到目前为止所做的工作：

rescan-scsi-bus.sh -r

pvcreate /dev/mapper/mpathe
  Physical volume "/dev/mapper/mpathe" successfully created.
pvcreate /dev/mapper/mpathf
  Physical volume "/dev/mapper/mpathf" successfully created.
vgextend vgall /dev/mapper/mpathe
  Volume group "vgall" successfully extended
vgextend vgall /dev/mapper/mpathf
  Volume group "vgall" successfully extended

但现在 lvextend 显示以下内容：

lvextend -l +100%FREE /dev/vgall/lvol0
  Using stripesize of last segment 4.00 KiB
  Rounding size (152285551 extents) down to stripe boundary size for segment (152285548 extents)
  Size of logical volume vgall/lvol0 changed from 478.39 TiB (125408168 extents) to 478.51 TiB (125439052 extents).
  Logical volume vgall/lvol0 successfully resized.

这基本上没什么，并且后续运行确实显示：

lvextend -l +100%FREE  /dev/vgall/lvol0
  Using stripesize of last segment 4.00 KiB
  Rounding size (152285551 extents) down to stripe boundary size for segment (152285548 extents)
  Size of logical volume vgall/lvol0 unchanged from 478.51 TiB (125439052 extents).
  Command failed with status code 5.

PV/LV/VG输出显示如下：

  --- Physical volume ---
  PV Name               /dev/mapper/mpatha
  VG Name               vgall
  PV Size               <119.60 TiB / not usable 4.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              31352042
  Free PE               0
  Allocated PE          31352042

  --- Physical volume ---
  PV Name               /dev/mapper/mpathb
  VG Name               vgall
  PV Size               <119.63 TiB / not usable 4.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              31359763
  Free PE               0
  Allocated PE          31359763

  --- Physical volume ---
  PV Name               /dev/mapper/mpathc
  VG Name               vgall
  PV Size               <119.60 TiB / not usable 4.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              31352042
  Free PE               0
  Allocated PE          31352042

  --- Physical volume ---
  PV Name               /dev/mapper/mpathd
  VG Name               vgall
  PV Size               <119.63 TiB / not usable 4.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              31359763
  Free PE               0
  Allocated PE          31359763

  --- Physical volume ---
  PV Name               /dev/mapper/mpathe
  VG Name               vgall
  PV Size               <51.27 TiB / not usable 4.00 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              13438976
  Free PE               13431255
  Allocated PE          7721

  --- Physical volume ---
  PV Name               /dev/mapper/mpathf
  VG Name               vgall
  PV Size               51.20 TiB / not usable 4.00 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              13422965
  Free PE               13415244
  Allocated PE          7721


  --- Volume group ---
  VG Name               vgall
  System ID
  Format                lvm2
  Metadata Areas        6
  Metadata Sequence No  5
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                6
  Act PV                6
  VG Size               580.92 TiB
  PE Size               4.00 MiB
  Total PE              152285551
  Alloc PE / Size       125439052 / 478.51 TiB
  Free  PE / Size       26846499 / 102.41 TiB


  --- Logical volume ---
  LV Path                /dev/vgall/lvol0
  LV Name                lvol0
  VG Name                vgall
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                478.51 TiB
  Current LE             125439052
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:6



lvdisplay -m /dev/vgall/lvol0
  --- Logical volume ---
  LV Path                /dev/vgall/lvol0
  LV Name                lvol0
  VG Name                vgall
  LV UUID                MKcUYB-dAoJ-qJq1-hQEy-ArGl-c0bi-WKY0bU
  LV Write Access        read/write
  LV Creation host, time localhost.localdomain, 2023-10-04 20:00:04 +0200
  LV Status              available
  # open                 1
  LV Size                478.51 TiB
  Current LE             125439052
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:6

  --- Segments ---
  Logical extents 0 to 125408167:
    Type                striped
    Stripes             4
    Stripe size         4.00 KiB
    Stripe 0:
      Physical volume   /dev/mapper/mpathb
      Physical extents  0 to 31352041
    Stripe 1:
      Physical volume   /dev/mapper/mpathd
      Physical extents  0 to 31352041
    Stripe 2:
      Physical volume   /dev/mapper/mpatha
      Physical extents  0 to 31352041
    Stripe 3:
      Physical volume   /dev/mapper/mpathc
      Physical extents  0 to 31352041

  Logical extents 125408168 to 125439051:
    Type                striped
    Stripes             4
    Stripe size         4.00 KiB
    Stripe 0:
      Physical volume   /dev/mapper/mpathe
      Physical extents  0 to 7720
    Stripe 1:
      Physical volume   /dev/mapper/mpathf
      Physical extents  0 to 7720
    Stripe 2:
      Physical volume   /dev/mapper/mpathb
      Physical extents  31352042 to 31359762
    Stripe 3:
      Physical volume   /dev/mapper/mpathd
      Physical extents  31352042 to 31359762
lvm

3 个回答

  1. lvextend -l+100%FREE vgall/lvol0从手册页来看，它应该与可选一起使用，以-r同时增加 FS。对我来说，它在 Fedora40 上有效：

    lvextend -l+100%FREE home_vg/New_home -r
    Size of logical volume home_vg/New_home changed from 465,70 GiB (119220 extents) to 465,74 GiB (119230 extents).

    • 0

  2. 请发布输出：

    lvdisplay -m /dev/vgall/lvol0

    如果段类型是“条带化”而不是“线性”，则需要添加第 3 个新磁盘来扩展 LV。

    • 0
  3. Best Answer

    Lv 被创建为“条带化”，跨越 4 个 PV，因此为了扩展它，您需要 4 个具有可用扩展区的 PV。目前您只有 2 个，其他的都已满。

    啊，是的，谢谢你给我指明了正确的方向。LV 最初是同时使用 4 个 PV 创建的，在仅添加 2 个新 PV 后，我必须运行：

    lvextend -l+100%FREE /dev/vgall/lvol0 --stripes 2
    • 0

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