LVM : 論理ボリュームのミラーリング2020/02/07 |
|
ミラーリング論理ボリュームの作成方法です。
|
|
| [1] | 例として、物理ボリューム [/dev/sdb1] と [/dev/sdc1] を使用してミラーリングボリュームを作成します。 |
|
# [/dev/sdb1] と [/dev/sdc1] でボリュームグループ [vg_mirror] を作成 [root@dlp ~]# vgcreate vg_mirror /dev/sdb1 /dev/sdc1 Volume group "vg_mirror" successfully created # ミラー論理ボリューム作成 [root@dlp ~]# lvcreate -L 50G -m1 -n lv_mirror vg_mirror [ 2531.959241] raid6: sse2x1 gen() 10359 MB/s [ 2531.976238] raid6: sse2x1 xor() 7939 MB/s [ 2531.993235] raid6: sse2x2 gen() 13230 MB/s [ 2532.010231] raid6: sse2x2 xor() 8603 MB/s [ 2532.027235] raid6: sse2x4 gen() 16101 MB/s [ 2532.044231] raid6: sse2x4 xor() 9671 MB/s [ 2532.061232] raid6: avx2x1 gen() 22093 MB/s [ 2532.078231] raid6: avx2x1 xor() 15058 MB/s [ 2532.095212] raid6: avx2x2 gen() 25875 MB/s [ 2532.112225] raid6: avx2x2 xor() 15529 MB/s [ 2532.129227] raid6: avx2x4 gen() 28554 MB/s [ 2532.146226] raid6: avx2x4 xor() 16769 MB/s [ 2532.146888] raid6: using algorithm avx2x4 gen() 28554 MB/s [ 2532.147712] raid6: .... xor() 16769 MB/s, rmw enabled [ 2532.148476] raid6: using avx2x2 recovery algorithm [ 2532.150492] async_tx: api initialized (async) [ 2532.152735] xor: automatically using best checksumming function avx [ 2532.172850] device-mapper: raid: Loading target version 1.14.0 [ 2543.906914] device-mapper: raid: Superblocks created for new raid set [ 2543.927357] md/raid1:mdX: not clean -- starting background reconstruction [ 2543.928403] md/raid1:mdX: active with 2 out of 2 mirrors [ 2544.042790] mdX: bitmap file is out of date, doing full recovery [ 2544.143245] md: resync of RAID array mdX Logical volume "lv_mirror" created.[root@dlp ~]# lvdisplay /dev/vg_mirror/lv_mirror --- Logical volume --- LV Path /dev/vg_mirror/lv_mirror LV Name lv_mirror VG Name vg_mirror LV UUID coKLtX-CV30-l2Bm-64go-WdSR-or7k-2roKcK LV Write Access read/write LV Creation host, time dlp.srv.world, 2020-02-06 21:02:10 +0900 LV Status available # open 0 LV Size 50.00 GiB Current LE 12800 Mirrored volumes 2 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:6 |
| [2] | すでに稼働中の論理ボリュームをミラー化する場合は以下のように設定します。 |
|
# ボリュームグループ拡張 [root@dlp ~]# vgextend vg_data /dev/sdc1 Volume group "vg_data" successfully extended # 論理ボリュームミラー化 [root@dlp ~]# lvconvert -m1 /dev/vg_data/lv_data /dev/sdc1
Are you sure you want to convert linear LV vg_data/lv_data to raid1 with 2 images enhancing resilience? [y/n]: y
[ 3004.182907] device-mapper: raid: Device 1 specified for rebuild; clearing superblock
[ 3004.184179] device-mapper: raid: Superblocks created for new raid set
[ 3004.198075] md/raid1:mdX: active with 1 out of 2 mirrors
[ 3004.280198] mdX: bitmap file is out of date, doing full recovery
[ 3004.340224] md: recovery of RAID array mdX
Logical volume vg_data/lv_data successfully converted.
# 確認 : [Cpy%Sync] が [100] でデータ同期完了 [root@dlp ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert root cl -wi-ao---- <26.00g swap cl -wi-ao---- 3.00g lv_data vg_data rwi-a-r--- 50.00g 3.95 |
| [3] | 論理ボリュームのミラー化を解除する場合は以下のように設定します。 |
|
# -m0 で解除 [root@dlp ~]# lvconvert -m0 /dev/vg_data/lv_data
Are you sure you want to convert raid1 LV vg_data/lv_data to type linear losing all resilience? [y/n]: y
Logical volume vg_data/lv_data successfully converted.
[root@dlp ~]# lvs -a -o vg_name,name,devices,size VG LV Devices LSize cl root /dev/sda2(768) <26.00g cl swap /dev/sda2(0) 3.00g vg_data lv_data /dev/sdb1(0) 50.00g |
| Sponsored Link |