論理ボリュームの管理2011/05/09 |
| [1] | 論理ボリュームの作成 |
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# 論理ボリューム 'lv_data' を ボリュームグループ 'vg_data' に50Gの容量で作成 [root@dlp ~]# lvcreate -L 50G -n lv_data vg_data Logical volume "lv_data" created |
| [2] | 論理ボリュームの表示 |
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[root@dlp ~]# lvdisplay --- Logical volume --- LV Name /dev/vg_data/lv_data VG Name vg_data LV UUID Am3T89-eeB2-0dOd-ic1H-HDsG-bFJL-DFENt9 LV Write Access read/write LV Status available # open 0 LV Size 50.00 GB Current LE 12800 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:3 |
| [3] | 論理ボリュームの名前変更 |
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[root@dlp ~]# lvrename vg_data lv_data lv_storage # lv_data から lv_storage に変更 Renamed "lv_data" to "lv_storage" in volume group "vg_data" [root@dlp ~]# lvdisplay --- Logical volume --- LV Name /dev/vg_data/lv_storage # 変更された VG Name vg_data LV UUID Am3T89-eeB2-0dOd-ic1H-HDsG-bFJL-DFENt9 LV Write Access read/write LV Status available # open 0 LV Size 50.00 GB Current LE 12800 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:3 |
| [4] | 論理ボリュームのレポート出力 |
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[root@dlp ~]# lvs LV VG Attr LSize Origin Snap% Move Copy% Convert lv_storage vg_data -wi-a- 50.00G lv_home vg_dlp -wi-ao 30.63g lv_root vg_dlp -wi-ao 20.00g lv_swap vg_dlp -wi-ao 5.88g |
| [5] | 論理ボリュームのスキャン |
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[root@dlp ~]# lvscan ACTIVE '/dev/vg_data/lv_storage' [50.00 GiB] inherit ACTIVE '/dev/vg_dlp/lv_home' [30.63 GiB] inherit ACTIVE '/dev/vg_dlp/lv_root' [20.00 GiB] inherit ACTIVE '/dev/vg_dlp/lv_swap' [5.88 GiB] inherit |
| [6] | 論理ボリュームのスナップショット |
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# 'lv_storage' のスナップショットを 'snap-lv_storage' という名前で作成 [root@dlp ~]# lvcreate -s -L 50G -n snap-lv_storage /dev/vg_data/lv_storage Logical volume "snap-lv_storage" created
[root@dlp ~]#
--- Logical volume ---lvdisplay --- Logical volume --- LV Name /dev/vg_data/lv_storage VG Name vg_data LV UUID Am3T89-eeB2-0dOd-ic1H-HDsG-bFJL-DFENt9 LV Write Access read/write LV Status available # open 0 LV Size 50.00 GB Current LE 12800 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:3 LV Name /dev/vg_data/snap-lv_storage VG Name vg_data LV UUID Dy0PCV-izK5-vbC5-qoxP-3w1k-GGvw-atL2lU LV Write Access read/write LV snapshot status active destination for /dev/vg_data/lv_storage LV Status available # open 0 LV Size 50.00 GB Current LE 12800 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:3 |
| [7] | 論理ボリュームの拡張 ― 運用中にマウントしたまま実行できます。 |
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[root@dlp ~]# lvextend -L 100G /dev/vg_data/lv_storage # 100Gに拡張 Extending logical volume lv_storage to 100.00 GiB Logical volume lv_storage successfully resized
[root@dlp ~]#
[root@dlp ~]# lvdisplay --- Logical volume --- LV Name /dev/vg_data/lv_storage VG Name vg_data LV UUID Am3T89-eeB2-0dOd-ic1H-HDsG-bFJL-DFENt9 LV Write Access read/write LV Status available \# open 0 LV Size 100.00 GiB # 変更された Current LE 25600 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:3 resize2fs /dev/vg_data/lv_storage # サイズ変更 resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/VZ/FD3S is mounted on /; on-line resizing required Resizing the filesystem on /dev/vg_data/lv_storage to 39321600 (4k) blocks. The filesystem on /dev/vg_data/lv_storage is now 39321600 blocks long. |
| [8] | 論理ボリュームの縮小 ― この操作はファイルシステムの破壊を伴うため、事前にバックアップの取得が必要です。 |
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[root@dlp ~]# lvreduce -L 50G /dev/vg_data/lv_storage # 50Gに縮小 WARNING: Reducing active logical volume to 50.00 GiB THIS MAY DESTROY YOUR DATA (filesystem etc.) Do you really want to reduce lv_storage? [y/n]: y Reducing logical volume lv_storage to 50.00 GiB Logical volume lv_storage successfully resized [root@dlp ~]# lvdisplay --- Logical volume --- LV Name /dev/vg_data/lv_storage VG Name vg_data LV UUID Am3T89-eeB2-0dOd-ic1H-HDsG-bFJL-DFENt9 LV Write Access read/write LV Status available \# open 0 LV Size 50.00 GB # 変更された Current LE 12800 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:3
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| [9] | 論理ボリュームの削除 ― マウント解除して実行します。 |
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[root@dlp ~]# lvremove /dev/vg_data/lv_storage Do you really want to remove active logical volume lv_storage? [y/n]: y Logical volume "lv_storage" successfully removed |
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